CN106916003A - Amount type Macroelement water-soluble suspension liquid fertilizer and preparation method in organic-inorganic - Google Patents
Amount type Macroelement water-soluble suspension liquid fertilizer and preparation method in organic-inorganic Download PDFInfo
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- CN106916003A CN106916003A CN201510994997.1A CN201510994997A CN106916003A CN 106916003 A CN106916003 A CN 106916003A CN 201510994997 A CN201510994997 A CN 201510994997A CN 106916003 A CN106916003 A CN 106916003A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/40—Fertilisers incorporated into a matrix
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
- C05G5/27—Dispersions, e.g. suspensions or emulsions
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Abstract
The invention discloses amount type Macroelement water-soluble suspension liquid fertilizer and preparation method thereof in a kind of organic-inorganic.Amount type Macroelement water-soluble suspension liquid fertilizer refers to and the following components by weight percent containing in the organic solution after concentration in unit volume suspension liquid fertilizer in organic-inorganic：84 ~ 104kg/L of potassium dihydrogen phosphate, 220 ~ 240kg/L of diammonium hydrogen phosphate, 102 ~ 122kg/L of potassium sulfate, 140 ~ 160kg/L of potassium nitrate, 210 ~ 230kg/L of urea, 100 ~ 150kg/L of calcium disodium chelate, 50 ~ 100kg/L of ethylenediamine tetraacetic acid disodium magnesium salt, compound auxiliary 0.026kg/L.A great number of elements content is not less than 500g/L in suspension liquid fertilizer obtained by the present invention, and moderate-element content is not less than 10g/L.The suspension liquid fertilizer is used as a kind of broad spectrum type fertilizer, and good water solubility is easy to use, the double effectses with culture fertility and increase crop yield.
Description
Technical field
The present invention relates to agriculture suspension liquid technical field of fertilizer production, and in particular to amount type Macroelement water-soluble suspension liquid fertilizer and preparation method thereof in a kind of organic-inorganic.
Background technology
Nutrient composition content is high in macroelement fertilizer, wherein the content summation of a great number of elements is no less than 50%, it is a kind of nutrition that can be completely soluble more comprehensive, Water soluble fertilizer of instant effect, can be used to fertigation, foliage dressing, can also be used to carry out soilless culture etc..
Calcium constituent, as the moderate-element needed for plant, vital effect is played to growing for plant with magnesium elements.Plant calcium deficiency can make plant growth be obstructed, and branches and leaves excessive growth occur, and quality softens, the tip of a root or growing point and tender tissue necrosis, for the plant that bears fruit, calcium deficiency can cause the hardness of fruit to decline, influence fruit sucrose accumulation, poor taste has had a strong impact on the outward appearance and interior quality of agricultural product.Magnesium elements as Chlorophyll synthesis essential elements, be also the activator of many enzymes, once lacking, photosynthesis will be hindered to carry out, blade occur lose green, the symptom such as plant growth is abnormal；Magnesium deficiency can also influence the synthesis of the various materials such as vitamin simultaneously, cause fruit and vegetables quality to decline.
Suspension liquid fertilizer belongs to one kind of liquid fertilizer, and it has the advantages that nutrient content is high, water-soluble strong, formula is easy and adjusts.Its total nutrient content can be up to 45% ~ 50%, much larger than conventional clear liquid fertilizer.And in production practices, can combine crop regulation of fertilizer requirement, and locality soil fertility situation, adjust nutrient formula, be highly suitable for mechanized application, such as drip irrigation and sprinkling irrigation.At present, liquid fertilizer has obtained relatively broad application abroad, and such as in the U.S., liquid fertilizer accounts for 30% or so of chemical fertilizer total amount.In China, liquid fertilizer production has started to starting, and China improves constantly as a large agricultural country, agrotechnical level, and modernizing mechanical fertilizer application condition is also progressively improving, and conditions above provides wide space for the development of suspension liquid fertilizer.
Fertilizer commonly used in the prior art has organic fertilizer and inorganic fertilizer, and wherein nutrient content is low in organic fertilizer, causes amount of application significantly larger than inorganic fertilizer.Inorganic fertilizer nutrient content is high, fertilizer efficiency fast, compared with organic fertilizer, can play obvious effect of increasing production.But its fertilizer efficiency is short, crop utilization rate of fertilizer is low, and applying can also cause soil aciditiy change, soil hardening for a long time, and soil property is degenerated, and badly influences crop quality.In order to improve crop yield, generally also organic fertilizer and inorganic fertilizer are combined and are used, if but use simultaneously, due to the presence of moderate-element, formed suspension liquid fertilizer when, it is easy to other chemical substances occur chemical reaction generation insoluble matter, cause fertilizer poor fluidity, caking precipitation the problems such as, so as to reduce fertilizer efficiency, influence is used.
The content of the invention
Present invention aim at amount type Macroelement water-soluble suspension liquid fertilizer in a kind of organic-inorganic is provided, nutritional ingredient is high, good fluidity, without caking without deposited phenomenon.
To reach above-mentioned purpose, the invention provides following technical scheme.
Amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic provided by the present invention, refers to containing the organic solution after concentration, and following components by weight percent material in unit volume suspension liquid fertilizer：84 ~ 104kg/L of potassium dihydrogen phosphate, 220 ~ 240kg/L of diammonium hydrogen phosphate, the kg/L of potassium sulfate 102 ~ 122, the kg/L of potassium nitrate 140 ~ 160, the kg/L of urea 210 ~ 230, the kg/L of calcium disodium chelate 100 ~ 150, the kg/L of ethylenediamine tetraacetic acid disodium magnesium salt 50 ~ 100, compound auxiliary 0.026kg/L.
Wherein organic solution is to take the feces of livestock and poultry that water content is 70% ~ 85% to be prepared by organic fertilizer fermentation common process.
Compound auxiliary of the present invention is thickener, suspending agent, dispersant, wetting agent, surfactant according to mass ratio 4：7：6：6：3 are mixed to prepare.Wherein thickener is xanthans, and suspending agent is aluminium-magnesium silicate and sodium bentonite in mass ratio 1：1 mixture being mixed to prepare, dispersant is NNO and polycarboxylate in mass ratio 2：1 mixture being mixed to prepare, wetting agent is organosilicon wetting agent, and surfactant is Phosphate of Polyoxyethylene Isooctyl Ether.
Second purpose of the invention is to provide the preparation method of amount type Macroelement water-soluble suspension liquid fertilizer in the organic-inorganic, specifically includes following several steps：
（1）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh 84 ~ 104kg of potassium dihydrogen phosphate, 220 ~ 240kg of diammonium hydrogen phosphate, the kg of potassium sulfate 102 ~ 122, the kg of potassium nitrate 140 ~ 160, the kg of urea 210 ~ 230, the kg of calcium disodium chelate 100 ~ 120, the kg of ethylenediamine tetraacetic acid disodium magnesium salt 50 ~ 100, after well mixed, it is put into beating crusher, it is ground into powder, it is standby；
（2）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh xanthans 4g, the g of aluminium-magnesium silicate 3.5, sodium bentonite 3.5 g, NNO
After 4g, polycarboxylate 2g, organosilicon wetting agent 6g, Phosphate of Polyoxyethylene Isooctyl Ether 3g are well mixed, as compound auxiliary；
（3）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, measure 450 ~ 600 milliliters of organic solution after sterilizing and be added in compound auxiliary, stirred；
（4）By step（3）The mixed liquor of gained is added to step（1）The solid mixture of middle gained, stirs, and obtains brown liquid；
（5）To step（4）It is the organic solution after the sterilizing of 1L that the brown liquid of middle gained adds volume, after stirring, it is put into heat collecting type constant-temperature heating magnetic stirring apparatus, it is 65 DEG C to control heating-up temperature, 1300 turns/min ~ 2600 turn of rotor speed/min, until mixed liquor cumulative volume is 1L, that is, amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic is obtained.
Using technical scheme disclosed in this invention, with advantages below：
1）A great number of elements content nutrient content in the fertilizer that the present invention is obtained（N+P2O5+K2O）About 500g/L, moderate-element content（Ca+Mg））About 10g/L, meets People's Republic of China (PRC) agricultural industry criteria NY1107-2010《A great number of elements water-soluble fertilizer moderate-element type》；
2）The fertilizer that the present invention is obtained is a kind of broad spectrum type fertilizer, applied widely, wherein a great number of elements N：P2O5：K2O≈17：17：17；
3）Dissolubility is good in the fertilizer that the present invention is obtained, and does not have fine grain and precipitation, easy to use, organic principle therein, the effect with culture fertility and improvement crop quality, can improve grain yield, improves product quality；
4）Magnesium elements and calcium constituent in the fertilizer that the present invention is obtained exist in Chelating state form, stable chemical nature, it is easy to be absorbed and used by plants, and improve utilization rate of fertilizer, chelating agent can natural degradation, environment will not be impacted.
Specific embodiment
Below by case study on implementation, the present invention will be further described, its object is to be best understood from present disclosure.
Embodiment 1
（1）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh potassium dihydrogen phosphate 94kg, diammonium hydrogen phosphate 230kg, the kg of potassium sulfate 112, the kg of potassium nitrate 150, the kg of urea 220, the kg of calcium disodium chelate 150, the kg of ethylenediamine tetraacetic acid disodium magnesium salt 50, after well mixed, it is put into beating crusher, it is ground into powder, it is standby.
（2）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh xanthans 4g, the g of aluminium-magnesium silicate 3.5, sodium bentonite 3.5 g, NNO
After 4g, polycarboxylate 2g, organosilicon wetting agent 6g, Phosphate of Polyoxyethylene Isooctyl Ether 3g are well mixed, as compound auxiliary.
（3）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, measure 450 milliliters of organic solution after sterilizing and be added in compound auxiliary, stirred.
（4）By step（3）The mixed liquor of gained is added to step（1）The solid mixture of middle gained, stirs, and obtains brown liquid；
（5）To step（4）It is the organic solution after the sterilizing of 1L that the brown liquid of middle gained adds volume, after stirring, it is put into heat collecting type constant-temperature heating magnetic stirring apparatus, it is 65 DEG C to control heating-up temperature, 1300 turns/min of rotor speed, until mixed liquor cumulative volume is 1L, that is, amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic is obtained.
Embodiment 2
（1）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh potassium dihydrogen phosphate 100kg, diammonium hydrogen phosphate 225kg, the kg of potassium sulfate 110, the kg of potassium nitrate 145, the kg of urea 225, the kg of calcium disodium chelate 145, the kg of ethylenediamine tetraacetic acid disodium magnesium salt 110, after well mixed, it is put into beating crusher, it is ground into powder, it is standby.
（2）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh xanthans 4g, the g of aluminium-magnesium silicate 3.5, sodium bentonite 3.5 g, NNO
After 4g, polycarboxylate 2g, organosilicon wetting agent 6g, Phosphate of Polyoxyethylene Isooctyl Ether 3g are well mixed, as compound auxiliary.
（3）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, measure 500 milliliters of organic solution after sterilizing and be added in compound auxiliary, stirred.
（4）By step（3）The mixed liquor of gained is added to step（1）The solid mixture of middle gained, stirs, and obtains brown liquid；
（5）To step（4）It is the organic solution after the sterilizing of 1L that the brown liquid of middle gained adds volume, after stirring, it is put into heat collecting type constant-temperature heating magnetic stirring apparatus, it is 65 DEG C to control heating-up temperature, 1500 turns/min of rotor speed, until mixed liquor cumulative volume is 1L, that is, amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic is obtained.
Embodiment 3
（1）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh potassium dihydrogen phosphate 84kg, diammonium hydrogen phosphate 240kg, potassium sulfate 108kg, potassium nitrate
160 kg, the kg of urea 212, calcium disodium chelate 125
Kg, ethylenediamine tetraacetic acid disodium magnesium salt 75kg, after being well mixed, are put into beating crusher, are ground into powder, standby.
（2）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh xanthans 4g, the g of aluminium-magnesium silicate 3.5, sodium bentonite 3.5 g, NNO
After 4g, polycarboxylate 2g, organosilicon wetting agent 6g, Phosphate of Polyoxyethylene Isooctyl Ether 3g are well mixed, as compound auxiliary.
（3）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, measure 550 milliliters of organic solution after sterilizing and be added in compound auxiliary, stirred.
（4）By step（3）The mixed liquor of gained is added to step（1）The solid mixture of middle gained, stirs, and obtains brown liquid；
（5）To step（4）It is the organic solution after the sterilizing of 1L that the brown liquid of middle gained adds volume, after stirring, it is put into heat collecting type constant-temperature heating magnetic stirring apparatus, it is 65 DEG C to control heating-up temperature, 2000 turns/min of rotor speed, until mixed liquor cumulative volume is 1L, that is, amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic is obtained.
Embodiment 4
（1）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh potassium dihydrogen phosphate 104kg, diammonium hydrogen phosphate 220kg, potassium sulfate 105kg, potassium nitrate
150 kg, the kg of urea 230, calcium disodium chelate 120
Kg, the kg of ethylenediamine tetraacetic acid disodium magnesium salt 90, after being well mixed, are put into beating crusher, are ground into powder, standby.
（2）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh xanthans 4g, the g of aluminium-magnesium silicate 3.5, sodium bentonite 3.5 g, NNO
After 4g, polycarboxylate 2g, organosilicon wetting agent 6g, Phosphate of Polyoxyethylene Isooctyl Ether 3g are well mixed, as compound auxiliary.
（3）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, measure 450 milliliters of organic solution after sterilizing and be added in compound auxiliary, stirred.
（4）By step（3）The mixed liquor of gained is added to step（1）The solid mixture of middle gained, stirs, and obtains brown liquid；
（5）To step（4）It is the organic solution after the sterilizing of 1L that the brown liquid of middle gained adds volume, after stirring, it is put into heat collecting type constant-temperature heating magnetic stirring apparatus, it is 65 DEG C to control heating-up temperature, 2600 turns/min of rotor speed, until mixed liquor cumulative volume is 1L, that is, amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic is obtained.
Amount type Macroelement water-soluble suspension liquid fertilizer performance detection in the organic-inorganic that 1 ~ embodiment of embodiment 4 is prepared：
1. N, P in the organic-inorganic that 1 ~ embodiment of detection embodiment 4 is prepared respectively in amount type Macroelement water-soluble suspension liquid fertilizer2O5、K2The content of O, Ca, Mg, as a result as shown in table 1.
Table 1 N, P2O5、K2The content of O, Ca, Mg
2. the suspension liquid fertilizer for being obtained in pair embodiment 1 ~ 4 carries out study on the stability, observes crystal precipitation is whether there is within 30 days, 60 days, 150 days under the conditions of being positioned over 4 DEG C after it is prepared respectively.
The study on the stability of table 2
| Sample | 0 day | 30 days | 60 days | 150 days |
| Embodiment 1 | Without crystal | Without crystal | Without crystal | Without crystal |
| Embodiment 2 | Without crystal | Without crystal | Without crystal | Without crystal |
| Embodiment 3 | Without crystal | Without crystal | Without crystal | Without crystal |
| Embodiment 4 | Without crystal | Without crystal | Without crystal | Without crystal |
Result as shown in table 2, was observed by the experimental results of 150 days, in embodiment 1 ~ 4, was configured according to thickener, suspending agent, dispersant, wetting agent, proportion of surfactant in composite assistant, and resulting suspension liquid fertilizer has good stability.
3. amount type Macroelement water-soluble suspension liquid fertilizer application is clear water in control group on crops capsicum in the organic-inorganic that embodiment 1 ~ 4 is prepared（CK）On the premise of, the amount type Macroelement water-soluble suspension liquid fertilizer in the organic-inorganic for applying embodiment 1 ~ 4 draws following experimental result and phenomenon.
Application process according to Liquid Fertilizer is applied on green vegetables after the suspension liquid fertilizer obtained in clear water, and embodiment 1 ~ 4 is diluted according to a certain percentage respectively.Its fertilizer efficiency is considered by the ultimate output and chlorophyll content of green vegetables, as a result such as table 3.
Table 3
Effect of increasing production
| Group | Clear water group | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Capsicum units increased in production（%） | - | 27.3% | 26.9% | 28.5% | 25.7% |
| Capsicum Vc content（%） | - | 20.3% | 19.9% | 21.8% | 18.6% |
Conclusion：Compared with clear water control group, amount type a great number of elements suspension liquid fertilizer has obvious volume increase advantage in a kind of organic-inorganic of the invention.Embodiment 1 ~ 4 is on the premise of national standard is met, and effect of increasing production is similar.In the presence of moderate-element calcium, magnesium, in detection crops capsicum during Vc content, compared with clear water group, embodiment 1 ~ 4 has different degrees of Vc content increase.Amount type a great number of elements suspension liquid fertilizer has certain volume increase and quality improving function to crops capsicum in illustrating organic-inorganic of the present invention.
The announcement and teaching of book according to the above description, the technical staff of relevant art can also be changed and be changed to above-mentioned implementation method.In the case of without departing substantially from spirit of the invention and its essence, these change and deform accordingly should all belong to protection scope of the present invention.
Claims (9)
1. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic, it is characterised in that refer to containing the organic solution after concentration, and following components by weight percent material in unit volume suspension liquid fertilizer：84 ~ 104kg/L of potassium dihydrogen phosphate, 220 ~ 240kg/L of diammonium hydrogen phosphate, the kg/L of potassium sulfate 102 ~ 122, the kg/L of potassium nitrate 140 ~ 160, the kg/L of urea 210 ~ 230, the kg/L of calcium disodium chelate 100 ~ 150, the kg/L of ethylenediamine tetraacetic acid disodium magnesium salt 50 ~ 100, compound auxiliary 0.026kg/L.
2. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 1, it is characterised in that the organic solution is to take the feces of livestock and poultry that water content is 70% ~ 85% to be prepared by series of process fermentation.
3. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 1, it is characterised in that described compound auxiliary is thickener, suspending agent, dispersant, wetting agent, surfactant according to mass ratio 4：7：6：6：3 are mixed to prepare.
4. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 3, it is characterised in that the thickener is xanthans.
5. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 3, it is characterised in that suspending agent is aluminium-magnesium silicate and sodium bentonite in mass ratio 1：1 mixture being mixed to prepare.
6. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 3, it is characterised in that dispersant is NNO and polycarboxylate in mass ratio 2：1 mixture being mixed to prepare.
7. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 3, it is characterised in that wetting agent is organosilicon wetting agent.
8. amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic according to claim 3, it is characterised in that surfactant is Phosphate of Polyoxyethylene Isooctyl Ether.
9. the preparation method of suspension liquid fertilizer described in any one of claim 1-8, it is characterised in that including following several steps：
（1）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh 84 ~ 104kg of potassium dihydrogen phosphate, 220 ~ 240kg of diammonium hydrogen phosphate, the kg of potassium sulfate 102 ~ 122, the kg of potassium nitrate 140 ~ 160, the kg of urea 210 ~ 230, the kg of calcium disodium chelate 100 ~ 120, the kg of ethylenediamine tetraacetic acid disodium magnesium salt 50 ~ 100, after well mixed, it is put into beating crusher, it is ground into powder, it is standby；
（2）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, weigh xanthans 4g, the g of aluminium-magnesium silicate 3.5, sodium bentonite 3.5
After g, NNO 4g, polycarboxylate 2g, organosilicon wetting agent 6g, Phosphate of Polyoxyethylene Isooctyl Ether 3g are well mixed, as compound auxiliary；
（3）Calculated by amount type Macroelement water-soluble suspension liquid fertilizer in configuration 1L organic-inorganics, measure 450 ~ 600 milliliters of organic solution after sterilizing and be added in compound auxiliary, stirred；
（4）By step（3）The mixed liquor of gained is added to step（1）The solid mixture of middle gained, stirs, and obtains brown liquid；
（5）To step（4）It is the organic solution after the sterilizing of 1L that the brown liquid of middle gained adds volume, after stirring, it is put into heat collecting type constant-temperature heating magnetic stirring apparatus, it is 65 DEG C to control heating-up temperature, 1300 turns/min ~ 2600 turn of rotor speed/min, until mixed liquor cumulative volume is 1L, that is, amount type Macroelement water-soluble suspension liquid fertilizer in organic-inorganic is obtained.
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| CN110498710A (en) * | 2019-09-27 | 2019-11-26 | 汤秋华 | The formula and preparation method of a kind of concentrated type organic liquid compound fertilizer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107285927A (en) * | 2017-08-15 | 2017-10-24 | 清远市美村生物技术有限公司 | A kind of composite fertilizer with trace elements and preparation method thereof |
| CN110498710A (en) * | 2019-09-27 | 2019-11-26 | 汤秋华 | The formula and preparation method of a kind of concentrated type organic liquid compound fertilizer |
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