CN111875447B - High-concentration formula fertilizer for rubber trees and preparation method thereof - Google Patents
High-concentration formula fertilizer for rubber trees and preparation method thereof Download PDFInfo
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- CN111875447B CN111875447B CN202010750796.8A CN202010750796A CN111875447B CN 111875447 B CN111875447 B CN 111875447B CN 202010750796 A CN202010750796 A CN 202010750796A CN 111875447 B CN111875447 B CN 111875447B
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- C05—FERTILISERS; MANUFACTURE THEREOF
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- 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
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Abstract
The invention provides a high-concentration formula fertilizer for rubber trees and a preparation method thereof, wherein the formula fertilizer comprises 90-95% of inorganic fertilizer and 5-10% of composite gain fertilizer by weight percentage; n, P in the inorganic fertilizer2O5And K2Mass of OThe percentage is 20-23%: 10-12%: 13-15% of N + P in inorganic fertilizer2O5+K2The mass percentage content of the total O nutrient is 43-50%; the compound gain fertilizer comprises the following components in parts by mass: 1-3 parts of nitro humic acid calcium fertilizer, 1-2 parts of humic acid silicon fertilizer, 1-2 parts of nitro humic acid magnesium fertilizer, 10-15 parts of attapulgite and 6-12 parts of red sandstone; the high-concentration formula fertilizer for the rubber trees prepared by the invention can effectively improve the absorption and utilization rate of the fertilizer, increase the yield of the rubber trees per unit area, improve the soil structure, promote the nutrient balance of the soil, fully accelerate the growth and thickening of medium and small seedlings and improve the growth rate of the rubber trees.
Description
Technical Field
The invention relates to the technical field of agricultural fertilizers, in particular to a high-concentration formula fertilizer for rubber trees and a preparation method thereof.
Background
The land resources suitable for planting rubber trees in China are limited, the potential of improving the production capacity by expanding the planting area and expanding the scale in the natural rubber industry is smaller and smaller, and the continuous and deep research on the research and application technology of the formula fertilizer of the rubber trees has important significance for improving the yield of the cut trees in unit area and realizing the rapid growth of medium and small seedlings.
In the planting and production of rubber, because the absorption and utilization rate of rubber trees to fertilizers is limited, the current rubber formula fertilizers are mostly limited to low-concentration fertilizers, the total nutrient content is usually below 30%, but under the fertilizing condition of the low-concentration fertilizers, the defects of poor fertilizing effect, slow growth of medium and small seedlings, low yield per unit area of the rubber trees and the like exist; in addition, the planting of the rubber garden is mostly in hilly areas, and the application technology of the low-concentration fertilizer is easy to cause the problems of increased transportation cost, increased fertilization labor cost and the like. On the research of high-concentration fertilizer effect, the research relates to high-concentration compound fertilizers of economic crops such as rice, vegetables and the like, for example, the fertilizer supply performance of 5 high-concentration compound fertilizers on rice by the Wangkuan is compared; experiments and the like of influence of high-concentration water-soluble fertilizer Prhoduo on tomato yield, tomato quality and soil are carried out in Huangqing and the like, but relevant reports on trial production of high-concentration fertilizer and application effect conditions of the fertilizer are not found at present. Therefore, for further adjustment and upgrading of the rubber tree formula fertilizer, a novel rubber tree high-concentration formula fertilizer is developed, the absorption and utilization rate of the fertilizer is improved, the soil structure of a rubber garden is improved, the growth and thickening of medium and small seedlings are accelerated, the high and stable yield of the cut tree is realized, and an important basis is provided for the wide application of the high-concentration rubber formula fertilizer in the natural rubber industry.
Disclosure of Invention
In view of the above, the invention provides a high-concentration formula fertilizer for rubber trees and a preparation method thereof.
The technical scheme of the invention is realized as follows:
the invention provides a high-concentration formula fertilizer for rubber trees
The high-concentration formula fertilizer for the rubber trees comprises 90-95% of inorganic fertilizer and 5-10% of compound gain fertilizer by weight percentage; n, P in the inorganic fertilizer2O5And K2The mass percentage of O is 20-23%: 10-12%: 13-15% of N + P in inorganic fertilizer2O5+K2The mass percentage content of the total O nutrient is 43-50%; the compound gain fertilizer comprises the following components in parts by mass: 1-3 parts of nitro humic acid calcium fertilizer, 1-2 parts of humic acid silicon fertilizer, 1-2 parts of nitro humic acid magnesium fertilizer, 10-15 parts of attapulgite and 6-12 parts of red sandstone. The novel high-concentration formula fertilizer for the rubber trees is prepared, so that the absorption and utilization rate of the fertilizer is improved, the growth and thickening of medium and small seedlings are accelerated, the unit area yield of the rubber trees is increased, the soil structure is improved, and the nutrient balance of soil is promoted.
Further explaining, the composite gain fertilizer comprises the following components in parts by mass: 2 parts of nitro humic acid calcium fertilizer, 1.5 parts of humic acid silicon fertilizer, 1.5 parts of nitro humic acid magnesium fertilizer, 13 parts of attapulgite and 9 parts of red sandstone. The compound gain fertilizer is formed by mixing and compounding the medium element calcium humate silicon magnesium fertilizer, the attapulgite and the red sandstone in a certain mass proportion, so that a more stable slow release carrier is provided for the high-concentration nitrogen, phosphorus and potassium fertilizer, the nutrient balance in soil is maintained, the growth and thickening of medium and small seedlings are accelerated, and the unit area yield of rubber trees is improved.
Further explaining, the inorganic fertilizer comprises a nitrogenous fertilizer, a phosphate fertilizer and a potash fertilizer; n, P in the inorganic fertilizer2O5And K2The mass percent of O is 21%: 10.5%: 13.5 percent. The adjustment and control of the proportion of the nitrogen, phosphorus and potassium fertilizers are more beneficial to the nutrition balance of the rubber trees.
Further, the nitrogen fertilizer in the inorganic fertilizer is any one or a mixture of more of urea, monoammonium phosphate and diammonium phosphate.
Further, the phosphate fertilizer in the inorganic fertilizer is one or a mixture of more of monoammonium phosphate, diammonium phosphate and calcium magnesium phosphate.
Further, the potassium fertilizer in the inorganic fertilizer is potassium chloride.
A preparation method of a high-concentration formula fertilizer for rubber trees comprises the following steps:
(1) taking the raw materials of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer according to the proportion, mixing and crushing the raw materials, putting the raw materials into a stirrer for stirring, and uniformly mixing to prepare inorganic fertilizer powder materials;
(2) adding inorganic fertilizer powder materials into a dissolving tank containing 4-6 kg/t of water, and heating and dissolving at 90-100 ℃ to obtain inorganic fertilizer mixed liquid;
(3) mixing powdery nitro humic acid calcium fertilizer, humic acid silicon fertilizer and nitro humic acid magnesium fertilizer with attapulgite and red sandstone according to a ratio, uniformly stirring at a high speed of 1500-1800 r/min to obtain a composite gain fertilizer mixture, and sieving by a sieve of 10-20 meshes;
(4) and adding the inorganic fertilizer mixed solution into the composite gain fertilizer mixed solution, mixing uniformly at the speed of 80-100 r/min, and performing extrusion granulation, throwing, drying, cooling and sieving to obtain the high-concentration formula fertilizer for the rubber trees.
Further explaining, the step (3) also comprises pretreatment of the red sandstone, and the red sandstone is taken and added with water to be finely ground until the grain diameter is 0.05-0.1 mm, so that the red sandstone powder is obtained. The red sandstone in the high-concentration formula fertilizer for the rubber trees is more uniformly distributed, so that the red sandstone is effectively combined with the attapulgite, and the nutrient balance in the soil is promoted.
Further explaining, in the step (3), the stirring speed of the compound gain fertilizer mixture is 1600 r/min.
Further explaining, in the step (4), the granularity of the high-concentration formula fertilizer for the rubber trees is 3.5-5.5 mm.
Compared with the prior art, the invention has the advantages that the nitrogen-phosphorus-potassium fertilizer of the rubber tree formula fertilizer is further adjusted and upgraded, the total nutrient content of nitrogen, phosphorus and potassium can be improved to 43-50% on the basis of reasonably controlling the proportion among the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer, meanwhile, the high-concentration nitrogen-phosphorus-potassium fertilizer is combined with the compound gain fertilizer formed by mixing the nitro calcium humate fertilizer, the humic acid silicon fertilizer, the nitro magnesium humate fertilizer, the attapulgite and the red sandstone according to a certain proportion, so that effective interaction is formed between the compound gain fertilizer and the high-concentration nitrogen-phosphorus-potassium fertilizer, the nitrogen, phosphorus and potassium elements are fully and uniformly slowly released, the utilization rate of the rubber tree to the chemical fertilizer is fully improved, the unit area yield of the rubber tree is increased, the high and stable yield of the rubber tree is realized, the soil structure is improved, the influence of high-concentration fertilizer on the soil is reduced, and the nutrient balance of the soil is promoted, so that the root growth of the seedlings in the rubber and the absorption of nutrients are facilitated, and the growth and thickening of the seedlings in the rubber are accelerated. In addition, the high-concentration formula fertilizer developed by the invention can be applied to rubber planting, so that the fertilizing frequency can be reduced, the manual transportation and labor cost of fertilization in a rubber garden can be reduced, and the time and the labor are saved.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1AThe high-concentration formula fertilizer for the rubber trees comprises 90% of inorganic fertilizer and 10% of compound gain fertilizer in percentage by weight; n, P in the inorganic fertilizer2O5And K2The mass percentage of O is 20%: 10%: 13% of N + P in inorganic fertilizer2O5+K2The mass percentage content of the total O nutrient is 43 percent; the compound gain fertilizer comprises the following components in parts by mass: 1 part of nitro humic acid calcium fertilizer, 1 part of humic acid silicon fertilizer, 1 part of nitro humic acid magnesium fertilizer, 10 parts of attapulgite and 6 parts of red sandstone;
the nitrogen fertilizer in the inorganic fertilizer is mixed with urea and monoammonium phosphate in a mass ratio of 1: 1; the phosphate fertilizer is monoammonium phosphate; the potash fertilizer is potassium chloride.
Example 2-a high concentration formulated fertilizer for rubber trees, comprising, in weight percent, 95% inorganic fertilizer and 5% compound gain fertilizer; n, P in the inorganic fertilizer2O5And K2The mass percent of O is 23%: 12%: 15% of N + P in inorganic fertilizer2O5+K2The mass percentage content of the total O nutrient is 50 percent; the compound gain fertilizer comprises the following components in parts by mass: 3 parts of nitro humic acid calcium fertilizer, 2 parts of humic acid silicon fertilizer, 2 parts of nitro humic acid magnesium fertilizer, 15 parts of attapulgite and 12 parts of red sandstone;
the nitrogen fertilizer in the inorganic fertilizer is urea and monoammonium phosphate mixed according to the mass ratio of 1: 1; the phosphate fertilizer is monoammonium phosphate; the potash fertilizer is potassium chloride.
Example 3-a high concentration formulated fertilizer for rubber trees, comprising, in weight percent, 90% inorganic fertilizer and 10% compound benefit fertilizer; n, P in the inorganic fertilizer2O5And K2The mass percent of O is 21%: 10.5%: 13.5 percent of N + P in inorganic fertilizer2O5+K2The mass percentage content of the total O nutrient is 45 percent; the compound gain fertilizer comprises the following components in parts by mass: 2 parts of nitro humic acid calcium fertilizer, 1.5 parts of humic acid silicon fertilizer, 1.5 parts of nitro humic acid magnesium fertilizer, 13 parts of attapulgite and 9 parts of red sandstone;
the nitrogen fertilizer in the inorganic fertilizer is urea and monoammonium phosphate mixed according to the mass ratio of 1: 1; the phosphate fertilizer is monoammonium phosphate; the potash fertilizer is potassium chloride.
The preparation method of the rubber tree high-concentration formula fertilizer of the embodiments 1 to 3 includes the following steps:
(1) taking the raw materials of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer according to the proportion, mixing and crushing the raw materials, putting the raw materials into a stirrer for stirring, and uniformly mixing to prepare inorganic fertilizer powder materials;
(2) adding inorganic fertilizer powder materials into a dissolving tank containing 4kg/t of water, and heating and dissolving at 90 ℃ to obtain inorganic fertilizer mixed solution;
(3) mixing powdery nitro humic acid calcium fertilizer, humic acid silicon fertilizer and nitro humic acid magnesium fertilizer with attapulgite and red sandstone according to a proportion, uniformly stirring at a high speed of 1500r/min to obtain a composite gain fertilizer mixture, and sieving with a 10-mesh sieve;
(4) and adding the inorganic fertilizer mixed solution into the compound gain fertilizer mixed solution, uniformly stirring at 80r/min, and performing extrusion granulation, round throwing, drying, cooling and sieving to obtain the high-concentration formula fertilizer for the rubber trees, wherein the granularity of the high-concentration formula fertilizer is 3.5 mm.
Embodiment 4-a method for preparing a high concentration formulated fertilizer for rubber trees, comprising the steps of:
(1) according to the raw material proportion of the formula fertilizer in the embodiment 3, the raw materials of the nitrogenous fertilizer, the phosphatic fertilizer and the potash fertilizer are taken according to the proportion, mixed and crushed, and put into a stirrer to be stirred, and the inorganic fertilizer powder material is prepared after the mixture is uniformly mixed;
(2) adding inorganic fertilizer powder materials into a dissolving tank containing 6kg/t of water, and heating and dissolving at 100 ℃ to obtain inorganic fertilizer mixed solution;
(3) in the step (3), firstly, pretreating the red sandstone, taking the red sandstone according to a proportion, adding water, finely grinding the red sandstone until the grain diameter is 0.05mm to obtain red sandstone powder, mixing the red sandstone powder with the nitro humic acid calcium fertilizer, the humic acid silicon fertilizer, the nitro humic acid magnesium fertilizer and the attapulgite according to the proportion, uniformly stirring at a high speed of 1800r/min to obtain a composite gain fertilizer mixture, and sieving by a 20-mesh sieve;
(4) and adding the inorganic fertilizer mixed solution into the compound gain fertilizer mixed solution, mixing uniformly at 100r/min, and performing extrusion granulation, round throwing, drying, cooling and sieving to obtain the high-concentration formula fertilizer for the rubber trees, wherein the granularity of the high-concentration formula fertilizer is 5.5 mm.
Example 5-method for preparing a high concentration formulated fertilizer for rubber trees according to example 4, with the following differences: in the step (3), adding water into the red sandstone, and finely grinding the red sandstone until the grain diameter is 0.1 mm; and the red sandstone powder, the nitro humic acid calcium fertilizer, the humic acid silicon fertilizer, the nitro humic acid magnesium fertilizer and the attapulgite are uniformly stirred at a high speed under 1600r/min, and the other steps and parameters are the same as those of the embodiment 4.
Comparative example 1-method for preparing a high concentration formulated fertilizer for rubber trees according to example 4, with the difference that: the compound gain fertilizer in the formula fertilizer raw materials comprises the following components in parts by mass: 3 parts of nitro humic acid calcium fertilizer, 2 parts of humic acid silicon fertilizer, 2 parts of nitro humic acid magnesium fertilizer and 25 parts of attapulgite.
Comparative example 2-method for preparing a high concentration formulated fertilizer for rubber trees according to example 4, with the difference that: the compound gain fertilizer in the formula fertilizer raw materials comprises the following components in parts by mass: 3 parts of nitro humic acid calcium fertilizer, 2 parts of humic acid silicon fertilizer, 2 parts of nitro humic acid magnesium fertilizer, 15 parts of attapulgite and 12 parts of diatomite.
Comparative example 3-method for preparing a high concentration formulated fertilizer for rubber trees according to example 4, with the difference that: the compound gain fertilizer in the formula fertilizer raw materials comprises the following components in parts by mass: 3 parts of nitro humic acid calcium fertilizer, 2 parts of humic acid silicon fertilizer, 2 parts of nitro humic acid magnesium fertilizer, 13 parts of attapulgite and 20 parts of red sandstone.
Rubber planting experiments were performed on the rubber tree high-concentration formula fertilizers respectively prepared in examples 1 to 5 and comparative examples 1 to 3. Examples 1 to 5 were used as experimental groups; the rubber tree high-concentration fertilizer which is prepared in comparative examples 1-3 and by the preparation method of example 4 and contains 45% of nitrogen, phosphorus and potassium of pure inorganic fertilizer is used as a control group 1-4;
the test method comprises the following steps: the production type contrast method is adopted for arrangement test, and the test is continuously carried out for 3 years. Fertilizing according to a nutrient equivalent principle, digging a shallow trench for 30-40 centimeters in a stable period of the leaf canopy of the rubber tree, covering soil after fertilizing, applying the fertilizer for 3 times all the year around, applying 1.33kg of fertilizer to each plant of the cut tree, and applying 0.67kg of fertilizer to each plant of the medium and small seedlings; after the test arrangement, the yield condition of the tree cutting in 3 years and the thickening condition of the stem circumference of the medium and small seedlings in 3 years are continuously measured, the control management measures of rubber cutting, plant diseases and insect pests and the like in the rubber garden are uniformly executed according to the high standard of the production unit, and the results are as follows:
as can be seen from the above table, the rubber tree high-concentration formula fertilizer prepared in the embodiments 1-5 of the invention is applied to rubber cutting trees and planting of medium and small seedlings in rubber, the yield of the rubber tree cutting trees in 3 years is obviously improved, and the stem circumference thickening amount of the medium and small seedlings in 3 years is increased, wherein the application effect of the rubber tree high-concentration formula fertilizer of the experimental group 5 is the best, and is obviously superior to the fertilizing effect of the rubber tree high-concentration fertilizer of the control group 4, which uses a pure inorganic fertilizer and has a total nutrient content of nitrogen, phosphorus and potassium of 45%, so that the invention shows that the compound gain fertilizer is formed by mixing the high-concentration nitrogen, phosphorus and potassium fertilizers with the nitro calcium humate fertilizer, the humic acid silicon fertilizer, the nitro magnesium humate fertilizer, the attapulgite and the red sandstone in a certain proportion, the compound gain fertilizer and the high-concentration nitrogen, phosphorus and potassium fertilizer form effective interaction, and the utilization rate of the rubber trees is fully improved, the yield per unit area of the rubber cutting trees is increased, the root growth of the seedlings in the rubber and the absorption of nutrients are facilitated, and the purposes of accelerating the growth and thickening of the seedlings and improving the growth rate of the rubber trees are achieved. In addition, as can be seen from comparison between the experimental group 3 and the experimental groups 4-5, in the preparation process of the formula fertilizer, the pretreatment of the red sandstone is beneficial to fully improving the more uniform distribution of the red sandstone in the high-concentration fertilizer of the rubber tree, so that the red sandstone is effectively combined with the attapulgite, the nutrient balance in the soil is promoted, and the growth rate of the rubber tree is improved.
The comparison between the experimental group 4 and the control groups 1-2 shows that the yield per unit area and the stem circumference thickening amount of the medium and small saplings in the control groups 1-2 are reduced, which shows that the invention adopts the mixing and compounding of the attapulgite and the red sandstone, has obvious synergistic effect, can fully improve the utilization rate of the rubber tree in the high-concentration formula fertilizer, and promote the growth rate of the medium and small saplings. According to the experimental group 4 and the control group 3, the compound gain fertilizer is formed by mixing and compounding the medium element calcium humate silicon magnesium fertilizer, the attapulgite and the red sandstone in a certain mass proportion, so that a more stable slow release carrier is provided for the high-concentration nitrogen, phosphorus and potassium fertilizer, the nutrient balance in soil is maintained, the growth and thickening of medium and small seedlings are fully accelerated, and the growth rate of rubber trees is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A high-concentration formula fertilizer for rubber trees is characterized in that: the formula fertilizer comprises 90-95% of inorganic fertilizer and 5-10% of composite gain fertilizer by weight percentage; the inorganic fertilizer is a mixture of a nitrogenous fertilizer, a phosphate fertilizer and a potash fertilizer; the nitrogen fertilizer in the inorganic fertilizer is any one or mixture of urea, monoammonium phosphate and diammonium phosphate; the phosphate fertilizer in the inorganic fertilizer is one or a mixture of more of monoammonium phosphate, diammonium phosphate and calcium magnesium phosphate fertilizer; the potash fertilizer in the inorganic fertilizer is potassium chloride;
n, P in the inorganic fertilizer2O5And K2The mass percentage of O is 20-23%: 10-12%: 13-15% of N + P in inorganic fertilizer2O5+K2The mass percentage content of the total O nutrient is 43-50%; the compound gain fertilizer comprises the following components in parts by mass: 1-3 parts of nitro humic acid calcium fertilizer, 1-2 parts of humic acid silicon fertilizer, 1-2 parts of nitro humic acid magnesium fertilizer, 10-15 parts of attapulgite and 6-12 parts of red sandstone; the red sandstone is red sandstone powder which is prepared by adding water into the red sandstone and finely grinding the red sandstone to the grain diameter of 0.05-0.1 mm.
2. The high-concentration formula fertilizer for rubber trees as claimed in claim 1, wherein the formula fertilizer comprises the following components: the compound gain fertilizer comprises the following components in parts by mass: 2 parts of nitro humic acid calcium fertilizer, 1.5 parts of humic acid silicon fertilizer, 1.5 parts of nitro humic acid magnesium fertilizer, 13 parts of attapulgite and 9 parts of red sandstone.
3. According to claim1, the high-concentration formula fertilizer for the rubber trees is characterized in that: n, P in the inorganic fertilizer2O5And K2The mass percent of O is 21%: 10.5%: 13.5 percent.
4. A preparation method of the rubber tree high-concentration formula fertilizer as claimed in any one of claims 1 to 3, characterized by comprising the following steps: the method comprises the following steps:
(1) taking the raw materials of the nitrogenous fertilizer, the phosphate fertilizer and the potash fertilizer according to the proportion, mixing and crushing the raw materials, putting the raw materials into a stirrer for stirring, and uniformly mixing to prepare inorganic fertilizer powder materials;
(2) adding inorganic fertilizer powder materials into a dissolving tank containing 4-6 kg/t of water, and heating and dissolving at 90-100 ℃ to obtain inorganic fertilizer mixed liquid;
(3) mixing powdery nitro humic acid calcium fertilizer, humic acid silicon fertilizer and nitro humic acid magnesium fertilizer with attapulgite and red sandstone according to a ratio, uniformly stirring at a high speed of 1500-1800 r/min to obtain a composite gain fertilizer mixture, and sieving by a sieve of 10-20 meshes;
(4) and adding the inorganic fertilizer mixed solution into the composite gain fertilizer mixed solution, mixing uniformly at the speed of 80-100 r/min, and performing extrusion granulation, throwing, drying, cooling and sieving to obtain the high-concentration formula fertilizer for the rubber trees.
5. The preparation method of the high-concentration formula fertilizer for the rubber trees, according to claim 4, is characterized in that: and (3) pretreating the red sandstone, namely adding water into the red sandstone, and finely grinding the red sandstone until the grain diameter is 0.05-0.1 mm to obtain red sandstone powder.
6. The preparation method of the high-concentration formula fertilizer for the rubber trees, according to claim 4, is characterized in that: in the step (3), the stirring speed of the compound gain fertilizer mixture is 1600 r/min.
7. The preparation method of the high-concentration formula fertilizer for the rubber trees, according to claim 4, is characterized in that: in the step (4), the granularity of the high-concentration formula fertilizer for the rubber trees is 3.5-5.5 mm.
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| CN102531794B (en) * | 2012-02-28 | 2013-11-06 | 范永强 | Multifunctional soil improved sustained-release environment-friendly fertilizer and preparation method thereof |
| CN103408384B (en) * | 2013-07-05 | 2014-12-31 | 海南赣***业有限公司 | Long-lasting special fertilizer for rubber tree and preparation method thereof |
| CN103664399B (en) * | 2013-12-16 | 2015-12-30 | 天津丰润园精细化工科技有限公司 | A kind of pear tree special slow release fertilizer and preparation method thereof |
| CN103819252B (en) * | 2014-03-11 | 2015-09-23 | 湖北中化东方肥料有限公司 | A kind of rubber tree dedicated fertilizer and preparation method thereof |
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| CN111196745A (en) * | 2018-10-31 | 2020-05-26 | 山东省花生研究所 | Humic acid peanut special fertilizer with combination of nutrients and balanced nutrients |
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