NL2026346B1 - Method and kit for improving plant growth - Google Patents

Abstract

The invention relates to a method, use, combination and kit for improving plant growth. With the present invention the inventor aims to improve plant strength so that plants are strong enough to withstand pests and diseases and be capable of outgrowing weeds, so that the need for pesticides is strongly reduced or even prevented.

Description

Method and kit for improving plant growth The invention relates to a method, use kit and combination for improving plant growth. Introduction In order to protect crops and plants from pests, dis- eases and weeds often pesticides are used. These are often harmful for the environment and health. Summary of the invention With the present invention the inventor aims to improve plant strength so that plants are strong enough to withstand pests and diseases and be capable of outgrowing weeds, so that the need for pesticides is strongly reduced or even prevented.

The present invention relates in a first aspect to a kit for improving plant growth, comprising: a first agueous dispersion, wherein the first dispersion comprises humic acids, a sulphate salt, a nitrate salt, and a phosphate salt; a second aqueous dispersion, wherein the second aque- ous dispersion comprises calcium salt, a chelating agent, ; wherein the first aqueous dispersion and/or the second aque- ous dispersion comprises trace elements; and wherein the first aqueous dispersion and/or the second aqueous disper- sion comprises an algae extract.

The invention relates in a second aspect to a combina- tion of humic acids, sulphate salt, nitrate salt, phosphate salt; calcium salt, a chelating agent, an algae extract and trace elements, for application on a plant’s canopy.

The invention relates in a third aspect to a method of improving plant growth, wherein the method comprises: providing the kit of the first aspect; combining the first aqueous dispersion with the second agueous dispersion; and applying the combined aqueous dispersion on the canopy of the plant.

The invention relates in a fourth aspect to the use of the combination of the second aspect for obtaining enhanced plant strength so that plants are strong enough to withstand pests and diseases and to outgrow weeds, wherein the combi- nation 1s applied to the plant’s canopy.

With the provision of the above defined invention the need for using pesticides is strongly reduced or even pre- vented. Moreover, the kit and method of the present inven- tion are safe in use with regard to health and environment.

Short description of the drawings Figure 1A shows rose leaves which are not treated ac- cording to the method of the invention.

Figure 1B shows rose leaves which are treated according to the method of the invention.

Figure ZA shows a rose leaf that contains mildew and wherein the leaf is not treated according to the method of the invention.

Figure 2B shows a rose leaf that has no mildew and wherein the leaf is treated according to method of the in- vention.

Figure 3A shows a rose leaf that contains a fungal disease and wherein the leaf is not treated according to the method of invention.

Figure 3B shows a rose leaf that has no fungal disease and wherein the leaf is treated according to the method of the invention.

Figure 4A shows a rose bush which is not treated ac- cording to the method of the invention.

Figure 4B shows the same bush as in Figure 4A a few weeks later, wherein the bush is treated once according to the method of the invention.

Detailed description of the invention The present invention relates to a method and kit and combination for improving plant growth and is based on the finding that a combination of humic acids, sulphate salt,

nitrate salt, phosphate salt; calcium salt, a chelating agent, an algae extract and trace elements, when applied to the plant’s canopy leads to enhanced plant strength so that plants are strong enough to withstand pests and diseases and to outgrow weeds, so that the need for pesticides is strongly reduced or even prevented. The ingredients are provided in two separate aqueous dispersions, which are combined and optionally diluted to the desired concentrations short be- fore application to the plant’s canopy. The inventor has found that this results in optimal uptake by the plant, especially by the leaves. As a result, the present invention allows the use of a relatively low amount of the aqueous dispersion by spraying the plants from above. This way only low amounts of valuable nutrients will leach out in the soil. In this respect loss of valuable nutrients is pre- vented by the provision of the present invention. The in- vention herewith provides a strong advantage compared to compositions that promote plant strength that are applied on the soil.

Further, the inventor has found that the quality of the plant can be increased if treated with the kit, combination and method of the invention in particular with regard to color, firmness, volume, size and shape of the plant and also the produce of the plant.

The inventor has found that combining the first and second dispersion as short as possible before applying the combined dispersion to the plant’s canopy leads to optimal uptake of the ingredients by the plant. It is therefore preferred that the combined dispersion is applied to the plant's canopy directly after combining the first and second dispersion. An optional step of dilution may take place before application.

The first agqueous dispersion and the second aqueous dispersion are combined such that the combined adueous dis- persion is formed. This can be done by conventional mixing technidues.

The first and second dispersions may be in the form of a concentrate. This allows easy shipment and storage. In order to obtain the desired concentrations of ingredients to be applied on the plants, a dilution step may take place before application onto the plant’s canopy. Dilution may take place before or after combining the first and second dispersions. The dilution step preferably takes place before combining the dispersions. In this case the concentrates are diluted and subsequently mixed to obtain the combined aque- ous dispersion.

A concentrate of the first and second aqueous disper- sion may suitably be 750 x — 2500 x concentrated with regard to the eventual combined dispersion that is applied on the plant’s canopy. For instance a first concentrated dispersion may be diluted 1000 x, while also the second concentrated dispersion is diluted 1000 x, so that in the combined dis- persion the ingredients of the first and second dispersions are diluted with a total factor of 2000 x.

Dilution suitably takes place with water.

The invention relates in particular to plants culti- vated on land, such as soil cultivated plants. The combined dispersion is applied on the plant’s canopy, rather than on the soil. The canopy of the plant is the portion of the plant which is above the ground and comprises leaves, stems, fruits, and/or flowers. In accordance with the invention the combined dispersion is applied such that it contacts in particular the leaves, because contacting the leaves results in the strongest advantageous effects.

The aqueous dispersion in the context of the present invention may be in the form of a suspension or a solution. In a preferred embodiment the aqueous dispersion is a solu- tion, since the solution can be better absorbed by the canopy of the plant than the suspension. This way only low amounts of the combined dispersion will be lost by leaching out in the soil and the strongest advantageous effects are ob- tained.

The first aqueous dispersion comprises humic acids. Humic acids are organic acids that develop in humus because there is insufficient oxygen to fully degrade organic mol- ecules in the humus. Humic acids are a mixture of many 5 different long-chain molecules, wherein the long-chain mol- ecules comprise many aromatic rings, a linear carbon chain, and many functional groups such as carboxyl and alcohol groups. The inventor has surprisingly found that the inclu- sion of humic acids in the first aqueous suspension forms an important contribution to the achievement of the advan- tageous effects of the kit and method of the invention as mentioned above.

In a preferred embodiment the concentration of humic acid in the first dispersion is chosen such that upon com- bination with the second dispersion and optional dilution with water the concentration of humic acids to which the plants are exposed is in the range of 0,00006 g/L to 00,0007 g/L of the combined dispersion applied on the plant, pref- erably in the range of 0,00013 g/L to 0,00053 g/L of the combined dispersion applied on the plant. The inventor sur- prisingly found that these amounts contribute to an optimal plant yield and improved quality of the plant.

In a preferred exemplary embodiment the product Humi- first is used as a source of humic acids. This product can be commercially obtained from Tradecorp. Humifirst is a liq- uid that contains humic acids (13,2% w/v), a humus extract (16,5% w/v), and fulvo acids (3,3% w/v).

In this sense the first aqueous dispersion may in ad- dition also contain fulvo acids and/or humus extract in addition to humic acids.

Humifirst may be present in the first dispersion in the range of 1 mL to 10 mL in 2000 L of the combined dispersion applied on the plant, preferably in the range of 2 mL to 6 mL in 2000 L of the combined dispersion applied on the plant, more preferably 4 mL in 2000 L of the combined dispersion applied on the plant.

The first aqueous dispersion further comprises a sul- phate salt. The inventor has found that the addition of a sulphate salt in the dispersion also forms an important contribution to improved plant growth and strength, result- ing in healthy strong stems that can support leaves.

In an embodiment the sulphate salt is magnesium sul- phate, potassium sulphate, or a combination thereof. These compounds dissolve well in the aqueous solution so that the sulphates are taken up very well by the leaves of the plants.

The inventor has found that the addition of magnesium sul- phate contributes to an improved color of the leaves. In particular less pale, yellow or yellowish-white leaves are observed. This way leaves can have an excellent green color which is probably caused by the high presence of chloro- phylls which convert carbon dioxide and water, using sun- light, into oxygen and glucose. Therefore, optimal photo- synthesis can take place, which further contributes to strength, vigor and production of the plant.

Excellent results in this respect are obtained for plants that are sensitive to chlorosis when the magnesium sulphate in the first dispersion is chosen such that upon combination with the second dispersion and optional dilution with water the concentration of magnesium sulphate to which the plants are exposed is in the range of 0,05 g/L to 0,10 g/L of the combined dispersion applied on the plant, pref- erably in the range of 0,06 g/L to 0,09 g/L of the combined dispersion applied on the plant, more preferably in the range of 0,07 g/L to 0,08 g/L of the combined dispersion applied on the plant. When these ratios were used, an optimal effect in prevention of chlorosis was observed. Chlorosis can cause leaves to turn pale, yellow, or yellow-white. This can indicate that leaves produce insufficient chlorophyll which is responsible for the green color of leaves. Excel- lent green leaves were observed instead, allowing optimal photosynthesis.

Alternatively or in addition the sulphate salt is po- tassium sulphate. The inventor has found that addition of potassium sulphate in the dispersion contributes to improved stems. In particular, thick and strong stems are observed.

These stems are able to support large leaves, heavy fruits, and/or large flowers. Further, the inventor has found that thick and strong stems contribute to a certain disease re- sistance. This results in an increased plant yield compared to a plant that is not treated with potassium sulphate.

In an embodiment the concentration of potassium sul- phate in the first dispersion is chosen such that upon com- bination with the second dispersion and optional dilution with water the concentration of potassium sulphate to which the plants are exposed is in the range of 0,135 g/L to 0,185 g/L of the combined dispersion applied on the plant, pref- erably in the range of 0,150 g/L to 0,170 g/L of the combined dispersion applied on the plant, more preferably in the range of 0,155 g/L to 0,165 g/L of the combined dispersion applied on the plant. With these concentrations particularly thick and strong stems are observed.

In a preferred embodiment the first dispersion com- prises magnesium sulphate and potassium sulphate. The in- ventor has found that the inclusion of magnesium sulphate and potassium sulphate in the first aqueous suspension forms a particular advantageous contribution to the achievement of thick and strong stems as well as improved color of the leaves.

The first aqueous dispersion further comprises a ni- trate salt. The inventor has found that the addition of nitrate in the dispersion contributes to an increased sur- face area of a leaf. This way more light can be absorbed such that a faster rate of photosynthesis may take place. Moreover, the inventor has found that nitrate improves plant growth, leading to earlier maturation compared to a plant that 1s not treated with the nitrate salt. This leads to earlier harvest compared to a plant that is not treated with the nitrate salt, which is economically advantageous.

In an embodiment the nitrate salt is potassium nitrate which dissolves well in the agqueous solution so that the nitrates are taken up very well by the leaves of the plants. The inventor has found that addition of potassium nitrate in the dispersion contributes to an increased surface area of a leaf, larger fruits and/or flowers compared to the surface area of a leaf, fruits and/or flowers of a plant that is not treated with potassium nitrate.

In an embodiment the concentration of potassium nitrate in the first dispersion is chosen such that upon combination with the second dispersion and optional dilution with water the concentration of potassium nitrate to which the plants are exposed is in the range of 0,075 g/L to 0,125 g/L of the combined dispersion applied on the plant, preferably in the range of 0,090 g/L to 0,110 g/L of the combined dispersion applied on the plant, more preferably in the range of 0,095 g/L to 0,15 g/L of the combined dispersion applied on the plant. The inventor has found that these concentrations re- sult in optimal result with regard to an increased surface area of leaves as well as an increased volume of the fruits and/or increased size of the flowers.

The first agueous dispersion further comprises a phos- phate salt. The inventor has found that the addition of a phosphate salt in the dispersion contributes to improved root growth, which further contributes to a better plant yield compared to a plant that is not treated with phosphate salt. In a preferred embodiment the phosphate salt is po- tassium phosphate. Potassium phosphate dissolves well in the aqueous solution so that the phosphates are taken up very well by the leaves of the plants.

Excellent results in this respect are obtained when the potassium phosphate concentration in the first dispersion is chosen such that upon combination with the second dis- persion and optional dilution with water the concentration of potassium phosphate to which the plants are exposed is in the range of 0,025 g/L to 0,075 g/L of the combined dispersion applied on the plant, more preferably in the range of 0,035 g/L to 0,065 g/L of the combined dispersion applied on the plant, more preferably in the range of 0,045 g/L to 0,055 g/L. The second aqueous dispersion on its turn comprises a calcium salt. The inventor has surprisingly found that the inclusion of a calcium salt forms an important contribution to improved fruit quality. The fruit is from a better quality compared to a fruit from a plant that is not treated with the calcium salt. In a preferred embodiment the calcium salt is a calcium nitrate. Calcium nitrate dissolves well in the aqueous solution so that calcium and nitrates are taken up very well by the leaves of the plants. The inventor has found that the inclusion of a calcium nitrate contributes to an improved color, firmness, size and/or shape of the fruit.

Excellent results in this respect are obtained when the calcium nitrate concentration in the second dispersion is chosen such that upon combination with the first dispersion and optional dilution with water the concentration of cal- cium nitrate to which the plants are exposed is in the range of 0,175 g/L to 0,225 g/L of the combined dispersion applied on the plant, preferably in the range of 0,190 g/L to 0,215 g/L of the combined dispersion applied on the plant, more preferably in the range of 0,195 g/L to 0,210 g/L of the combined dispersion applied on the plant. When these amounts were used, fruits with a particularly excellent color, firm- ness, size and/or shape are obtained, resulting in a high quality of the fruit.

The first or second aqueous dispersion further com- prises an algae extract. It is also possible that both com- prise an algae extract. These extracts include various bi- omolecules, such as amino acids, vitamins, and polysaccha- rides. The inventor surprisingly found that the algae ex- tract contributes to plant development. In a preferred em- bodiment the algae extract is based on Ascophyllum nodosum.

Asceophylliym nodosum includes plant hormones, amino acids, carbohydrates, and trace elements. The inventor has found that the algae extract based on Ascophyllum nodosum con- tributes to plant development and growth, leading to earlier maturation. The leaves, fruits, and/or flowers of the plant are earlier formed. This leads to earlier harvest compared to a plant that is not treated with Ascophyllum nodosum, which is economically advantageous.

In an embodiment the dry matter algal content based on Ascophyilym nodosum in the combined dispersion as applied on the plant is in the range of 0,0001 g/L to 0,003 g/L, preferably in the range of 0,00015 g/L to 0,002 g/L, more preferably 0,0012 g/L. The inventor has surprisingly found that these amounts result in plant development and growth, resulting in earlier maturation compared to a plant that is not treated with the algae extract based on Ascophyllum nodosum.

As an exemplary algae extract the product Algan may be used in the first and/or second aqueous dispersion as an exemplary algae extract. Algan is an algae extract based on Ascophyllum nodosum with a dry matter content of 30 wt.% and can be commercially obtained from Royal Brinkman. It in- cludes plant hormones, amino acids, carbohydrates, and trace elements. Algan may suitably be dispersed in the first and/or second dispersion such that the amount of applied on the plant is in the range of 1 mL to 10 mL in 2000 L of the combined dispersion applied on the plant, preferably in the range of 2 mL to 8 mL in 2000 L of the combined dispersion applied on the plant, more preferably 4 mL in 2000 L of the combined dispersion applied on the plant. The inventor has found that with these amounts particular improvements in plant development and growth occur.

The second aqueous dispersion further comprises a che- lating agent. The inventor has found that addition of a chelating agent contributes to an improved health of a plant. The inventor has found that the chelating agent con- tributes to improved nutrient uptake of the plant. Without wishing to be bound by theory the inventor further believes that chelating agents may ‘/trap’’ these nutrients that oth- erwise these nutrients cannot be absorbed by the plant The plant may not be capable of absorbing these nutrients be- cause of their positive charge and the plant’s negative charge. However, when the chelating agents ‘ trap’’ these nutrients a neutral or slightly negatively charged complex may be formed. The plant may then be capable of absorbing the formed complex. This way nutrient uptake of the plant will be improved.

In a preferred embodiment the chelating agent is EDTA, DTPA, or a combinations thereof. The inventor has found that ethylene diamine tetra acetic acid (EDTA) and diethylene triamine penta acetic acid (DTPA) in the dispersion forms an important contribution to healthier plants. The inventor has found that these agents improve nutrient uptake of the plant.

In practice the chelating agent in the context of the invention is in the form of a metal-chelate complex, pref- erably in the form of a chelated trace element.

In a preferred embodiment the second aqueous dispersion comprises EDTA and/or DTPA and chelated with elements se- lected from the group of iron, zinc, manganese and copper. The inventor has found that addition of iron and further EDTA and/or DTPA in the dispersion contributes to an im- proved color of the leaves. These leaves are excellent green compared to the leaves of a plant that is not treated with EDTA and/or DPTA chelates. Therefore the chelates in the context of the invention preferably contain at least iron chelates, such as Fe-DTPA.

The inventor believes that EDTA and/or DTPA may ‘trap’ ’ metals such that a metal-EDTA complex and/or metal- DTPA complex is formed, wherein the formed metal-EDTA com- plex and/or metal-DTPA is absorbed by the canopy of the plant.

In a preferred exemplary embodiment the chelates com- prise iron-DIPA, zinc-EDTA, manganese-EDTA and copper-EDTA,

preferably in an ratio based on the elementary metal ele- ments in weight of 20-30 Fe/ 1-3 Zn/ 10-16 Mn/ 1-3 Cu.

In an embodiment the concentration of chelating agents in the second dispersion is chosen such that upon combina- tion with the first dispersion and optional dilution with water the concentration chelating agents to which the plants are exposed is in the trace element range based on the elemental chelated metals, i.e. an average concentration of less than 100 parts per million (ppm) measured in the atomic count or less than 100 milligrams based on each che- lated metal species per liter of the combined dispersion to which the plants are exposed. In this respect the chelated metals may also be considered as chelated trace elements. These amounts result in excellent green leaves, allowing optimal photosynthesis.

It is important that either in the first dispersion or in the second dispersion, or in both, trace elements are included; that is trace elements other than chelated trace elements. In an embodiment the first or second dispersion comprises these unchelated trace elements, wherein the trace elements comprise boron, iron, manganese, copper, molyb- denum, and zinc. The inventor has found that addition of boron (B) derived from the trace elements in the dispersion contributes to an increased flower, fruit and/or seed pro- duction. The inventor has found that addition of iron (Fe) derived from the trace elements in the dispersion contrib- utes to an improved color of the leaves compared to a plant that is not treated with iron. The inventor has found that addition of manganese (Mn) derived from the trace elements in the dispersion contributes to an improved plant growth and development compared to a plant that is not treated with manganese. The inventor has found that addition of copper (Cu) derived from the trace elements in the dispersion con- tributes to an improved color of the leaves compared to a plant that is not treated with copper. The inventor has found that addition of molybdenum (Mo) derived from the trace elements in the dispersion contributes to an improved color of the leaves compared to a plant that is not treated with molybdenum. The inventor has found that addition of zinc (Zn) derived from the trace elements in the dispersion contributes to an improved plant growth compared to a plant that is not treated with zinc.

In an embodiment the trace elements in the first or second dispersion is chosen such that upon combination with the first dispersion or second dispersion the combined aque- ous dispersion comprises boron, iron, manganese, copper, and molybdenum. The amounts of trace elements in the combined dispersion as applied on the plant suitably have an average concentration of less than 100 parts per million (ppm) meas- ured in the atomic count or less than 100 micrograms per gram.

Iron, manganese, copper and zinc are preferably present as chelated trace elements in the second dispersion.

In a highly preferred embodiment a first aqueous dis- persion comprises humic acids, magnesium sulphate, potassium sulphate, potassium nitrate, potassium phosphate; and a sec- ond aqueous dispersion comprises calcium nitrate, a chelat- ing agent, and an algae extract; wherein the first aqueous dispersion and/or the second aqueous dispersion comprises trace elements. The inventor has found that this particular combination of humic acids, magnesium sulphate, potassium sulphate, potassium nitrate, potassium phosphate, calcium nitrate, a chelating agent, algae extract and trace ele- ments, when applied to the plant’s canopy leads to very good results with respect to improved plant growth. In addition, the inventor observed that these plants were very strong and capable to withstand pests and diseases and outgrow weeds, resulting in healthier plants and improved plant yield com- pared to a plant that is not exposed to this combination.

In an embodiment hereof the combined aqueous dispersion as applied on the plant comprises: humic acid in the range of 0,00006 g/L to 00,0007 g/L, magnesium sulphate in the range of 0,05 g/L to 0,10 g/L;

potassium sulphate in the range of and 0,135 g/L to 0,185 g/L; potassium nitrate in the range of 0,075 g/L to 0,125 g/L; potassium phosphate in the range of 0,025 g/L to 0,075 g/L; calcium nitrate in the range of 0,175 g/L to 0,225 g/L; algae extract based on Ascophyllum nodosum in the range of 0,0001 g/L to 0,003 g/L based on dry algae matter; and trace elements, wherein the trace elements comprise boron, iron, manganese, copper, molybdenum, and zinc, pref- erably in the amounts specified above.

The inventor has found that these concentrations result optimal plant growth, resulting in earlier maturation.

This leads to earlier harvest compared to a plant that is not treated with the first aqueous dispersion and second aqueous dispersion, which is economically advantageous.

Moreover, the inventor has found that these concentrations result high quality of the plant.

In particular, the fruits, flowers, seeds, leaves, roots and stems are improved compared to fruits, flowers, seeds, leaves, roots and stems from a plant that is not treated with the first and seconds aqueous dis- persion.

The fruits and flowers have a better color, firm- ness, volume, size and/or shape.

The stems are thick and strong such that they support the heavy fruits, large flow- ers and/or the large, green leaves.

The roots are also thick and strong such that they form an excellent anchor that supports the canopy of the plant.

In addition, the inventor has found that the plant is strong enough to withstand pests and diseases and outgrow weeds.

This results in increased plant yield and a healthier plants compared to a plant that is not treated with the first and second aqueous dispersion.

Depending on the weather conditions, type of plant, and the soil, the amount of humic acid, magnesium sulphate, potassium sulphate, potassium nitrate, potassium phosphate, and calcium nitrate, chelating agent and algae extract may be adjusted to obtain optimal plant growth.

The plant is exposed to different weather conditions during a summer period than during a winter period.

Summers are hotter, drier, and sunnier than the winter period.

A plant therefore needs higher concentrations of humic acids, sulphate salt, nitrate salt, phosphate salt, calcium salt, chelating agents, algae extract and trace elements during the summer period than during the winter period.

In an embodiment a first aqueous dispersion and a sec- ond agueous dispersion are used during a summer period, wherein the combined aqueous dispersion as applied on the plant comprises: humic acids in a range of 0,00026 g/L to 0,00067 g/L, preferably in the range from 0,00040 g/L to 0,00067 g/L; magnesium sulphate in the range of 0,07 g/L to 0,10 g/L, preferably in the range of 0,08 g/L to 0,10 g/L potassium sulphate in the range of 0,16 g/L to 0,185 g/L, preferably in the range of 0,170 g/L to 0,185 g/L; potassium nitrate in the range of 0,10 g/L to 0,125 g/L, preferably in the range of 0,110 g/L to 0,125 g/L; potassium phosphate in the range of 0,05 g/L to 0,075 g/L, preferably in the range of 0,065 g/L to 0,075 g/L; calcium nitrate in the range of 0,20 g/L to 0,225 g/L, preferably in the range of 0,215 g/L to 0,225 g/L; algae extract based on Ascophyllum nodosum in the range of 0,00015 g/L to 0,003 g/L based on dry algae matter; and trace elements, chelated and unchelated, wherein the trace elements are preferably as specified above and in the above identified preferred amounts.

In particular, the yield and quality of the fruit and vegetables which are produced by the plant during the summer period is increased with these amounts.

Examples of these summer fruits are strawberries, cherry’s, and blueberries and examples of these summer veg- etables are tomatoes, cucumbers, and paprika.

In practice, to obtain these concentrations a first concentrate is used that can be further diluted by a factor 1000 to 2000 such that the above mentioned concentrations are obtained. For example, in this case the first aqueous dispersion may comprise: humic acids in a range of 0,0528 g/L to 0,132 g/L of the first aqueous dispersion, preferably in the range from 0,0792 g/L to 0,132 g/L of the first agueous dispersion; magnesium sulphate in the range of 15 g/L to 20 g/L of the first combined aqueous dispersion, preferably in the range of 17 g/L to 20 g/L of the first aqueous dispersion; potassium sulphate in the range of 32 g/L to 37 g/L of the first aqueous dispersion, preferably in the range of 35 g/L to 37 g/L of the first aqueous dispersion; potassium nitrate in the range of 20 g/L to 25 g/L of the first aqueous dispersion, preferably in the range of 23 g/L to 25 g/L of the first agueous dispersion; potassium phosphate in the range of 10 g/L to 15 g/L of the first aqueous dispersion, preferably in the range of 12 g/L to 15 g/L of the first aqueous dispersion.

The concentrations of the first agueous dispersion can be further diluted such that upon combination with the sec- ond dispersion the concentrations are obtained to which the plants are exposed.

A second concentrated dispersion in this respect that can be further diluted by a factor 1000 to 2000 such that the above mentioned concentrations as applied on the plant in the summer are obtained may comprise: calcium nitrate in the range of 40 g/L to 45 g/L of the second aqueous dispersion, preferably in the range of 42 g/L to 45 g/L of the second aqueous dispersion; chelated trace elements; algae extract based on Ascophyllum nodosum in the range of 0,2 g/L to 6 g/L based on dry algal matter of the second dispersion. Either the first or the second concentrate or both contain unchelated trace elements. Only the second con- centrate contains chelated trace elements, andin the above specified trace amounts.

In an embodiment a first agueous dispersion and a sec- ond aqueous dispersion are used during a winter period,

wherein the combined dispersion as applied on the plant comprises: humic acids in a range of 0,00006 g/L to 0,00026 9/L, preferably in the range of 0,00006 g/L to 0,00013 g/L; magnesium sulphate in the range of 0,05 g/L to 0,07 g/L, preferably in the range of 0,05 g/L to 0,06 g/L; potassium sulphate in the range of 0,135 g/L to 0,155 g/L, preferably in the range of 0,135 g/L to 0,150 g/L; potassium nitrate in the range of 0,075 g/L to 0,095 g/L, preferably in the range of 0,075 g/L to 0,090 g/L; potassium phosphate in the range of 0,025 g/L to 0,045 g/L, preferably in the range of 0,025 g/L to 0,035 g/L; calcium nitrate in the range of 0,175 g/L to 0,195 g/L, preferably in the range of 0,175 g/L to 0,195 g/L; algae extract based on Ascophyllum nodosum in the range 0,0001 g/L to 0,002 g/L; and trace elements, chelated and unchelated, wherein the trace elements are preferably as specified above and in the above identified preferred amounts.. In particular, the yield and quality of the vegetables which are produced by the plant during the winter period is increased using these concentrations. This way the leaves are still able to per- form photosynthesis, despite the minimum amount of sun hours during the winter period. Examples of these winter vegeta- bles are onions, carrots, and kale.

In addition, the plants are less susceptible to dis- eases and infestations that are typically during the winter period. For example, rusts.

In practice, to obtain these concentrations of the com- bined aqueous dispersion for use in the winter a first con- centrated dispersion may be used that can be further diluted by a factor 1000 - 2000 such that the above mentioned con- centrations are obtained. For example, such a concentrated first aqueous dispersion may comprise: humic acids in a range of 0,0132 g/L to 0,0528 g/L of the first aqueous dispersion, preferably in the range from 0,0264 g/L to 0,0132 g/L of the first aqueous dispersion;

magnesium sulphate in the range of 10 g/L to 15 g/L of the first combined aqueous dispersion, preferably in the range of 12 g/L to 15 g/L of the first aqueous dispersion; potassium sulphate in the range of 27 g/L to 32 g/L of the first aqueous dispersion, preferably in the range of 27 g/L to 30 g/L of the first agueous dispersion; potassium nitrate in the range of 15 g/L to 20 g/L of the first aqueous dispersion, preferably in the range of 15 g/L to 18 g/L of the first aqueous dispersion; potassium phosphate in the range of 5 g/L to 10 g/L of the first aqueous dispersion, preferably in the range of 5 g/L to 7 g/L of the first aqueous dispersion.

As a second concentrated dispersion that can be further diluted by a factor 1000 - 2000 such that the above mentioned concentrations are obtained a concentrated second aqueous dispersion may comprise: calcium nitrate in the range of 35 g/L to 40 g/L of the second aqueous dispersion, preferably in the range of 35 g/L to 38 g/L of the second aqueous dispersion; chelated trace elements; algae extract based on Ascophylium nodosum in the range of 0,2 g/L to 4 g/L of the second dispersion.

Either the first or the second concentrate or both contain trace elements, wherein only the second concentrate may contain chelated trace elements.

The trace elements are in the above identified preferred amounts.

In a preferred embodiment the combined and optionally diluted agueous dispersion has a pH value in the range of 5,5 to 7,5, preferably from 6,0 to 7,0. The inventor has found that these pH values contribute to optimal absorption of the combined dispersion, resulting in an improved plant growth.

In a preferred embodiment applying the combined dis- persion to the plant is performed by spraying.

The inventor has found that spraying contributes to optimal absorption of the combined dispersion by the canopy of the plant.

The combined dispersion may be sprayed onto the plant from be- low. However, it is preferred that spraying occurs from above the plant, so that the whole surface of the canopy is covered by the combined dispersion, more preferably wherein the whole surface of the leaves that functions in photosyn- thesis is covered by the combined dispersion. This results in optimal contacting of the leaves with the spray. In order to facilitate spraying sprinklers may be used.

In an embodiment droplets of the combined dispersion are sprayed on the canopy of the plant. The inventor has found that the droplets contribute to the removal of dust and dirt, resulting in clean leaves of the plant. The clean leaves are exposed to sunlight such that optimal photosyn- thesis takes place.

In an embodiment mist of the combined dispersion is sprayed on the canopy of the plant. The inventor has found that mist contributes to humidity of a plant, resulting in optimal photosynthesis.

It is preferred that the combined aqueous dispersion is applied on the canopy of the plant at least every week. This results in optimal growth of the plant.

In a further preferred embodiment the combined agueous dispersion is applied twice a week. Depending on the results and the season it may be preferred that the dispersion is applied every three to four days, resulting in optimal plant growth.

is the plant may be an ornamental plant. An ornamental plant is a plant for decorative purposes, such as for example decorating landscapes or gardens. These plants can be trees, garden plants, or cut flowers.

The ornamental plant that is treated according to the method of the invention has an improved plant growth com- pared to an ornamental plant that is not treated according to the method of the invention. An example of an ornamental plant is a hydrangea. The inventor has observed that a hy- drangea treated in accordance with the method of the inven- tion has larger flowers, stronger stems, stronger roots, and greener leaves than a hydrangea that is not treated accord- ing to the method of the invention. Thus, the treated hy- drangea is healthier and has a better quality than the un- treated hydrangea. In addition, the inventor has found that the treated hydrangea is strong enough to withstand pests and diseases and outgrow weeds.

Another example of an ornamental plant is a rose. The inventor has found that a rose that is treated according to the method of the invention grows faster than a rose that is not treated according to the method of the invention. The treated rose can be pruned after 4 to 5 weeks, while a rose which is not treated according to the method of the invention can only be pruned after 6 to 7 weeks. Therefore, a breeder produces more roses when using the method according to the invention. In addition, the inventor has found that the treated roses are strong enough to withstand pests and dis- eases.

In another embodiment the plant is a crop plant. The crop plant is a plant that ís cultivated for agriculture purposes. The crop plant produces food, such as for example cereals, fruits, and vegetables.

The crop plant that is treated according to the method of the invention has an improved plant growth and yield compared to a crop plant that 1s not treated according to the method of the invention.

An example of a crop plant in the context of the in- vention is a tomato plant. The inventor has found that a tomato plant that is treated according to the method of the invention produces up to 40% more tomatoes compared to a tomato plant that is not treated according to the method of the invention. In addition, a treated tomato plant produces larger tomatoes compared to an untreated tomato plant. These large tomatoes have a better color, firmness, and shape compared to a tomato from an untreated tomato plant. Thus, the treated tomato plant produces high quality tomatces. The inventor further observed that a treated tomato plant is strong enough to withstand pests and diseases and outgrow weeds which further contributes to a higher yield of toma- toes. Examples The invention will now be further elucidated in the following examples. The following explanation is meant to illustrate and explain the invention and not to limit the claims.

Example 1: Kit according to the invention for a summer pe- In this example a first aqueous dispersion for a summer period is prepared by mixing together: — 180 gram magnesium sulphate, — 350 gram potassium sulphate — 230 gram potassium nitrate, — 130 gram potassium phosphate, and — 6 mL of Humifirst. Afterwards, 10 L water including trace elements is added.

After preparing the first aqueous dispersion, the second aqueous dispersion is prepared. The second aqueous disper- sion is prepared by mixing together: — 430 gram calcium nitrate, — 5,28 gram chelates containing iron-DTPA, zinc-EDTA, manganese-EDTA and copper-EDTA in a ratio based on the el- ementary metal elements in weight of 20-30 Fe/ 1-3 Zn/ 10- 16 Mn/ 1-3 Cu, and - 6 mL of Algan. Afterwards, 10 L water including trace elements is added..

The prepared first aqueous dispersion is diluted with 1000 L water and the prepared second agueous dispersion is also diluted with 1000 L. The diluted first aqueous disper- sion and diluted second aqueous dispersion are combined to obtain a total amount of 2000 L and mixed.

2000 L of the combined aqueous dispersion is then sprayed on one hectare of roses. The canopy of the roses is covered with a mist of the diluted combined dispersion. Application takes place once every week Figure 1A shows a part of a rose 1 which was not treated according this combined dispersion. The rose has a main stem 2 and two side stems 3. To one of the two side stems (not visible) four leaves 4 are attached. The leaves are drooping and the edges 5 of the leaves are curled. Droopy leaves can be caused by several different factors, such as watering issues, diseases, and pests.

Figure 1B shows a part of a rose 10 which is from the same plant species as rose 1 in Figure 1A. Rose 1 and 10 are present in the same greenhouse and exposed to the same con- ditions such as temperature, humidity and type of soil. The only difference between rose 1 and rose 10 is that rose 10 is treated according to the method of the invention. Figure 1B shows the results four weeks after spraying the combined aqueous dispersion as described in this example for the first time on the canopy of rose 10.

Figure 1B shows a main stem 11 and a side stem 12 of rose 10. Side stem 12 supports seven leaves 13. The stem 12 contains more leaves than the stem in Figure 1A. In addition, the leaves are excellent green, not curled, and not droop- ing. This results in high quality of the rose.

Example 2: Kit according to the invention for a winter pe- riod.

In this example a first aqueous dispersion for a winter period is prepared by mixing together: — 100 gram magnesium sulphate, — 270 gram potassium sulphate, — 150 gram potassium nitrate, — 50 gram potassium phosphate, and — 2 mL of Humifirst. Afterwards, 10 L water containing trace elements is added.

After preparing the first aqueous dispersion, the second aqueous dispersion is prepared. The second aqueous disper- sion is prepared by mixing together:

~ 350 gram calcium nitrate, — 3,28 gram chelates containing iron-DTPA, zinc-EDTA, manganese-EDTA and copper-EDTA in a ratio based on the el- ementary metal elements in weight of 20-30 Fe/ 1-3 Zn/ 10- 16 Mn/ 1-3 Cu, and — 2 mL of Algan.

Afterwards, 10 L water containing trace elements is added. The prepared first aqueous dispersion is diluted with 1000 L water and the prepared second aqueous dispersion is also diluted with 1000 L.

The diluted first aqueous dispersion and diluted second aqueous dispersion are combined and the obtained 2000 L is sprayed on one hectare of roses. The canopy of the roses is covered with a mist of the diluted combined dispersion.

Application takes place once every week.

Figure ZA shows a leaf 20 of a rose which is not treated with the combined dispersion disclosed herein. The mid rib 21 divides the leaf in two parts, wherein the left and right side of the mid rib contains mildew spots 22. The mildew is located between two veins 23. Mildew is a fungal disease that affects a wide range of plants. Usually, mildew is not fatal to a plant. However, when not treated, mildew can remove nutrients from the plant. This can lead to wither and yellow leaves and to a decrease of photosynthesis.

Figure 2B shows a leaf 24 of a rose. The leaf is from a rose which is from the same plant species as the leaf from the rose in Figure 2A. Moreover, the leaves 20 and 24 were present in the same greenhouse, thus the leaves were exposed to the same temperatures, humidity and type of soil. The only difference between leaf 20 and leaf 24 is that leaf 24 was treated according to the method of the invention. Figure 2B shows the results four weeks after spraying the combined aqueous dispersion as described in this example for the first time on the canopy of the rose.

The leaf 24 in Figure 2B has a mid rib 25 that divides the leaf 24 in two parts, wherein the left and right side of the mid rib has no mildew spots. This results that the plant treated according to the method of the invention is strong enough to withstand mildew, leading to healthy plants.

It should be noted that the roses in Figure 1A and 1B are cultivated during the summer period and the roses in Figure 2A and 2B are cultivated during the winter period. Therefore, slightly higher concentrations are used of mag- nesium sulphate, potassium sulphate, potassium nitrate, po- tassium phosphate, Humifirst, calcium nitrate, chelates and Algan during the summer period than during the winter pe- riod. Example 3: Kit according to the invention. In this example a first aqueous dispersion was prepared by mixing together: — 150 gram magnesium sulphate, ~ 320 gram potassium sulphate — 200 gram potassium nitrate, — 100 gram potassium phosphate, and — 4 mL of Humifirst. Afterwards, 10 L water including trace elements is added. After preparing the first aqueous dispersion, the second aqueous dispersion was prepared. The second aqueous disper- sion was prepared by adding together: — 400 gram calcium nitrate, — 4,4 gram chelates containing iron-DTPA, zinc-EDTA, manganese-EDTA and copper-EDTA in an ratio based on the elementary metal elements in weight of 20-30 Fe/ 1-3 Zn/ 10- 16 Mn/ 1-3 Cu, and — 4 mL of Algan. Afterwards, 10 L water including trace elements are added. The prepared first aqueous dispersion was diluted with 1000 L water and the prepared second aqueous dispersion was also diluted with 1000 L. The diluted first aqueous dispersion and diluted second aqueous dispersion are combined to obtain a mixture of 2000 L, which is then applied on one hectare of plants. The canopy of the plants is covered with a mist of the diluted combined dispersion.

Application takes place once every week.

Figure 3A shows a leaf 30 of a rose which is not treated with the method according to the invention.

The mid rib 31 divides the leaf in two parts, wherein at the left and right side of the mid rib several brown spots 32 are present.

These brown spots are caused by a rust disease which is a common fungal disease.

The fungal disease affects a wide range of plants.

In general, the fungal disease rarely kills plants.

However, it reduces the health of a plant, flower production, and/or yield reduction.

Further, it can easily spread to other plants.

Figure 3B shows a leaf 33 of a rose.

The leaf is from the rose which is from the same rose species as the leaf from the rose in Figure 3A.

The leaves 30 and 33 were present in the same greenhouse and exposed to the same conditions.

The only difference between leaf 30 and 33 is that leaf 33 was treated according to the method of the invention.

The inventor sprays the combined aqueous dispersion as prepared in this example on the leaf 24 of the plant.

Figure 3B shows the results four weeks after the first time spraying the combined aguecus dispersion on the canopy of the plant.

Leaf 33 has a mid rib which divides the leaf in two parts.

The left and right side of the mid rib shows no brown spots.

This results that the plant treated according to the method of the invention is strong enough to withstand fungal dis- ease, leading to healthy plants.

Figure 4A shows a rose bush 40 that is not treated with the method according to the invention.

The bush contains leaves 41 which are small and have a dark colour.

The in- ventor sprays the combined aqueous dispersion as prepared in this example on the canopy of that bush.

The bush is only spraved once.

Figure 4B shows the results seven days later The bush 40’ has bigger leaves 41’ compared to leaves 41. In addition, the leaves treated in accordance with the in- vention have an excellent green colour, leading to optimal photosynthesis which further contributes to strength, vigor and production of the bush.

Example 4: Kit according to the invention.

In this example a first aqueous dispersion was prepared by mixing together: — 100 gram magnesium sulphate, — 320 gram potassium sulphate — 150 gram potassium nitrate, — 20 gram potassium phosphate, and — 4 mL of Humifirst. — 4 mL of Algan Afterwards, 10 L water including trace elements is added.

After preparing the first aqueous dispersion, the second aqueous dispersion was prepared.

The second aqueous disper- sion was prepared by adding together: — 400 gram calcium nitrate, — 4,4 gram chelates containing iron-DTPA, zinc-EDTA, manganese-EDTA and copper-EDTA in an ratio based on the elementary metal elements in weight of 20-30 Fe/ 1-3 Zn/ 10- 16 Mn/ 1-3 Cu., 10 L water including trace elements are added.

The prepared first aqueous dispersion was diluted with 1000 L water and the prepared second aqueous dispersion was also diluted with 1000 L.

The diluted first aqueous dispersion and diluted second aqueous dispersion are com- bined to obtain a mixture of 2000 L, which is then applied on one hectare of plants to obtain the advantageous effects in accordance with the invention.

Claims (26)

CONCLUSIESCONCLUSIONS 1. Kit voor het verbeteren van plantengroei, omvat- tende: een eerste waterige dispersie, waarbij de eerste dis- persie humuszuren, een sulfaatzout, een nitraatzout, en een fosfaatzout omvat; een tweede waterige dispersie, waarbij de tweede wate- rige dispersie calciumionen en een chelaatvormer omvat; waarbij de eerste waterige dispersie en/of de tweede waterige dispersie spoorelementen omvat; en waarbij de eerste waterige dispersie en/of de tweede waterige dispersie een algenextract omvat.A plant growth enhancing kit comprising: a first aqueous dispersion, the first dispersion comprising humic acids, a sulfate salt, a nitrate salt, and a phosphate salt; a second aqueous dispersion, wherein the second aqueous dispersion comprises calcium ions and a chelating agent; wherein the first aqueous dispersion and/or the second aqueous dispersion comprises trace elements; and wherein the first aqueous dispersion and/or the second aqueous dispersion comprises an algae extract. 2. Kit volgens conclusie 1, waarbij het sulfaatzout magnesiumsulfaat, kaliumsulfaat, of een combinatie daarvan is.The kit of claim 1, wherein the sulfate salt is magnesium sulfate, potassium sulfate, or a combination thereof. 3. Kit volgens één van de voorgaande conclusies, waarbij het nitraatzout kaliumnitraat is.A kit according to any one of the preceding claims, wherein the nitrate salt is potassium nitrate. 4. Kit volgens één van de voorgaande conclusies, waarbij het fosfaatzout kaliumfosfaat is.A kit according to any one of the preceding claims, wherein the phosphate salt is potassium phosphate. 5. Kit volgens één van de voorgaande conclusies, waarbij de chelaatvormer EDTA, DTPA, of een combinatie daar- wan is.A kit according to any one of the preceding claims, wherein the chelating agent is EDTA, DTPA, or a combination thereof. 6. Kit volgens één van de voorgaande conclusies, waarbij het algenextract op Ascophyllum nodosum gebaseerd is.Kit according to any one of the preceding claims, wherein the algae extract is based on Ascophyllum nodosum. 7. Kit volgens één van de voorgaande conclusies, waarbij het calciumzout een calciumnitraat is.A kit according to any one of the preceding claims, wherein the calcium salt is a calcium nitrate. 8. Kit volgens één van de voorgaande conclusies, waarbij de eerste waterige dispersie humuszuren, magnesium- sulfaat, kaliumsulfaat, kaliumnitraat, kaliumfosfaat omvat; en waarbij de tweede waterige dispersie calciumionen, een chelaatvormer, en een algenextract omvat; waarbij de eerste waterige dispersie en/of de tweede waterige dispersie spoorelementen omvat.A kit according to any one of the preceding claims, wherein the first aqueous dispersion comprises humic acids, magnesium sulfate, potassium sulfate, potassium nitrate, potassium phosphate; and wherein the second aqueous dispersion comprises calcium ions, a chelating agent, and an algae extract; wherein the first aqueous dispersion and/or the second aqueous dispersion comprises trace elements. 9, Combinatie van humuszuren, sulfaatzout, nitraat- zout, fosfaatzout; calciumzout, een chelaatvormer, een al- genextract, en spoorelementen, voor toepassing op een bo- vengronds gedeelte van een plant.9, Combination of humic acids, sulfate salt, nitrate salt, phosphate salt; calcium salt, a chelating agent, an algae extract, and trace elements, for application to an above-ground portion of a plant. 10. Combinatie volgens conclusie 9, waarbij de humus- zuren, het sulfaatzout, het nitraatzout, het fosfaatzout; het calciumzout, een chelaatvormer, een algenextract en spoorelementen zijn zoals gedefinieerd één van de conclusies 2-7,The combination of claim 9, wherein the humic acids, the sulfate salt, the nitrate salt, the phosphate salt; the calcium salt, a chelating agent, an algae extract and trace elements are as defined in any one of claims 2-7, 11. Werkwijze voor het verbeteren van plantengroei, waarbij de werkwijze omvat: het verschaffen van de kit volgens één van de conclu- sies 1 - 8; het combineren van de eerste waterige dispersie met de tweede waterige dispersie; het aanbrengen van de gecombineerde waterige dispersie op het bovengrondse gedeelte van de plant.A method for improving plant growth, the method comprising: providing the kit according to any one of claims 1-8; combining the first aqueous dispersion with the second aqueous dispersion; applying the combined aqueous dispersion to the above-ground portion of the plant. 12. Werkwijze volgens conclusie 10, waarbij de eerste waterige dispersie, tweede waterige dispersie, en/of gecom- bineerde dispersie verdund wordt voordat de gecombineerde dispersie op het bovengrondse gedeelte van de plant aange- bracht wordt.The method of claim 10, wherein the first aqueous dispersion, second aqueous dispersion, and/or combined dispersion is diluted before the combined dispersion is applied to the above-ground portion of the plant. 13. Werkwijze volgens één van de conclusies 11 of 12, waarbij het magnesiumsulfaat in het traject van 0,05 g/L tot 0,10 g/L van de gecombineerde dispersie is die op het bo- vengrondse gedeelte van de plant aangebracht wordt, bij voorkeur in het traject van 0,06 g/L tot 0,09 g/L, met meer voorkeur in het traject van 0,07 g/L tot 0,08 g/L.A method according to any one of claims 11 or 12, wherein the magnesium sulfate is in the range of 0.05 g/L to 0.10 g/L of the combined dispersion applied to the above-ground portion of the plant, preferably in the range of 0.06 g/L to 0.09 g/L, more preferably in the range of 0.07 g/L to 0.08 g/L. 14. Werkwijze volgens één van de conclusies 11 - 13, waarbij het kaliumsulfaat in het traject van 0,135 g/L tot 0,185 g/L van de gecombineerde dispersie is die op het bo- vengrondse gedeelte van de plant aangebracht wordt, bij voorkeur in het traject van 0,150 g/L tot 0,170 g/L, met meer voorkeur in het traject van 0,155 g/L tot 0,165 g/L.A method according to any one of claims 11 to 13, wherein the potassium sulfate is in the range of 0.135 g/L to 0.185 g/L of the combined dispersion applied to the above-ground portion of the plant, preferably in the range from 0.150 g/L to 0.170 g/L, more preferably in the range from 0.155 g/L to 0.165 g/L. 15. Werkwijze volgens één van de conclusies 11 -14, waarbij het kaliumnitraat in het traject van 0,075 g/L tot 0,125 g/L van de gecombineerde dispersie is die op het bo- vengrondse gedeelte van de plant aangebracht wordt, bij voorkeur in het traject van 0,090 g/L tot 0,110 g/L, met meer voorkeur in het traject van 0,095 g/L tot 0,15 g/L.A method according to any one of claims 11 to 14, wherein the potassium nitrate is in the range of 0.075 g/L to 0.125 g/L of the combined dispersion applied to the aboveground portion of the plant, preferably in the range from 0.090 g/L to 0.110 g/L, more preferably in the range from 0.095 g/L to 0.15 g/L. 16. Werkwijze volgens één van de conclusies 11 - 15, waarbij het kaliumfosfaat in het traject van 0,025 g/L tot 0,075 g/L van de gecombineerde dispersie is die op het bo- vengrondse gedeelte van de plant aangebracht wordt, bij voorkeur in het traject van 0,035 g/L tot 0,065 g/L, met meer voorkeur in het traject van 0,045 g/L tot 0,055 g/L.A method according to any one of claims 11 to 15, wherein the potassium phosphate is in the range of 0.025 g/L to 0.075 g/L of the combined dispersion applied to the aboveground portion of the plant, preferably in the range from 0.035 g/L to 0.065 g/L, more preferably in the range from 0.045 g/L to 0.055 g/L. 17. Werkwijze volgens één van de conclusies 11 - 16, waarbij het calciumnitraat in het traject van 0,175 g/L tot 0,225 g/L van de gecombineerde dispersie is die op het bo- vengrondse gedeelte van de plant aangebracht wordt, bij voorkeur in het traject van 0,190 g/L tot 0,215 g/L, met meer voorkeur in het traject van 0,195 g/L tot 0,210 g/L.A method according to any one of claims 11 to 16, wherein the calcium nitrate is in the range of 0.175 g/L to 0.225 g/L of the combined dispersion applied to the aboveground portion of the plant, preferably in the range from 0.190 g/L to 0.215 g/L, more preferably in the range from 0.195 g/L to 0.210 g/L. 18. Werkwijze volgens één van de conclusies 11 - 17, waarbij algenextract in een traject van 0,0001 g/L tot 0,003 g/L gedispergeerd wordt, gebaseerd op drooggewicht van het algenextract van de gecombineerde dispersie die op het bo- vengrondse gedeelte van de plant aangebracht wordt.A method according to any one of claims 11 to 17, wherein algae extract is dispersed in a range from 0.0001 g/L to 0.003 g/L, based on dry weight of the algae extract of the combined dispersion applied to the aboveground portion of the plant is applied. 19. Werkwijze volgens één van de conclusies 11 - 18, waarbij humuszuren in een traject van 0,00006 g/L tot 0,0007 g/L van de gecombineerde dispersie gedispergeerd worden die op het bovengrondse gedeelte van de plant aangebracht wordt, bij voorkeur in het traject van 0,00026 g/L tot 0,00053 g/L.A method according to any one of claims 11 to 18, wherein humic acids are dispersed in a range from 0.00006 g/L to 0.0007 g/L of the combined dispersion applied to the above-ground part of the plant, preferably in the range of 0.00026 g/L to 0.00053 g/L. 20. Werkwijze volgens één van de conclusies 11 - 19, waarbij: humuszuren in het traject van 0,00006 g/L tot 0,0007 g/L van de gecombineerde dispersie zijn die op het boven- grondse gedeelte van de plant aangebracht wordt; magnesiumsulfaat in het traject van 0,05 g/L tot 0,10 g/L van de gecombineerde dispersie is die op het boven- grondse gedeelte van de plant aangebracht wordt; kaliumsulfaat in het traject van 0,135 g/L tot 0,185 g/L van de gecombineerde dispersie is die op het boven- grondse gedeelte van de plant aangebracht wordt; kaliumnitraat in het traject van 0,075 g/L tot 0,125 g/L van de gecombineerde dispersie is die op het boven- grondse gedeelte van de plant aangebracht wordt; kaliumfosfaat in het traject van 0,025 g/L tot 0,075 g/L van de gecombineerde dispersie is die op het boven- grondse gedeelte van de plant aangebracht wordt; calciumnitraat in het traject van 0,175 g/L tot 0,225 g/L van de gecombineerde dispersie is die op het boven- grondse gedeelte van de plant aangebracht wordt.The method of any one of claims 11 to 19, wherein: humic acids are in the range of 0.00006 g/L to 0.0007 g/L of the combined dispersion applied to the above-ground portion of the plant; magnesium sulfate is in the range of 0.05 g/L to 0.10 g/L of the combined dispersion applied to the above-ground portion of the plant; potassium sulfate is in the range of 0.135 g/L to 0.185 g/L of the combined dispersion applied to the above-ground portion of the plant; potassium nitrate is in the range of 0.075 g/L to 0.125 g/L of the combined dispersion applied to the above-ground portion of the plant; potassium phosphate is in the range of 0.025 g/L to 0.075 g/L of the combined dispersion applied to the above-ground portion of the plant; calcium nitrate is in the range of 0.175 g/L to 0.225 g/L of the combined dispersion applied to the above-ground portion of the plant. 21. Werkwijze volgens één van de conclusies 11 - 20, waarbij het aanbrengen door sproeien uitgevoerd wordt.A method according to any one of claims 11 to 20, wherein the application is carried out by spraying. 22. Werkwijze volgens één van de conclusies 11 - 21, waarbij de plant een sierplant of een gewas is.A method according to any one of claims 11 to 21, wherein the plant is an ornamental plant or a crop. 23. Werkwijze volgens conclusie 22, waarbij de sier- plant een roos is.The method of claim 22, wherein the ornamental plant is a rose. 24. Werkwijze volgens conclusie 22, waarbij het gewas een tomatenplant is.The method of claim 22, wherein the crop is a tomato plant. 25. Combinatie volgens conclusie 9 of 10, waarbij de hoeveelheden van humuszuren, sulfaatzout, nitraatzout, fos- Faatzout; calciumzout, een chelaatvormer, een algenextract en spoorelementen in één van de conclusies gedefinieerd zijn.A combination according to claim 9 or 10, wherein the amounts of humic acids, sulfate salt, nitrate salt, phosphate salt; calcium salt, a chelating agent, an algae extract and trace elements are defined in any one of the claims. 26. Gebruik van de combinatie volgens één van de con- clusies 9, 10, 25 voor het verkrijgen van een verbeterde plantsterkte waardoor planten sterk genoeg zijn om onge- dierte en ziekten te weerstaan en onkruid te ontgroeien, waarbij de combinatie op het bovengrondse gedeelte van de plant aangebracht wordt.Use of the combination according to any one of claims 9, 10, 25 to achieve improved plant strength whereby plants are strong enough to withstand pests and diseases and outgrow weeds, wherein the combination is on the aerial portion of the plant is applied. -0-0-0--0-0-0-0-