CN114747446A - Method for mixed planting of corn and soybean - Google Patents
Method for mixed planting of corn and soybean Download PDFInfo
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- CN114747446A CN114747446A CN202210338490.0A CN202210338490A CN114747446A CN 114747446 A CN114747446 A CN 114747446A CN 202210338490 A CN202210338490 A CN 202210338490A CN 114747446 A CN114747446 A CN 114747446A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/40—Fabaceae, e.g. beans or peas
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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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
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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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
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
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Abstract
The invention discloses a method for planting corn and soybean in a mixed mode, and belongs to the technical field of crop planting. According to the method for mixed planting of corn and soybean, the fertilizer is applied only once in the whole growth period, and different fertilizer effects are released in a targeted manner aiming at different growth periods through two layers of particle envelopes, so that the yield of crops is increased.
Description
Technical Field
The invention relates to the technical field of crop planting, in particular to a method for planting corn and soybean in a mixed mode.
Background
With the continuous increase of population and the rigid increase of grain requirements, intercropping planting is more and more emphasized and discussed by agricultural experts at home and abroad. Intercropping is the essence of traditional agriculture in China, has a long history, and makes great contribution in traditional agriculture and agriculture at present. The reasonable intercropping mode can intensively utilize natural resources such as light, heat, fertilizer, water and the like, is one of effective measures for increasing the biological diversity of farmlands, enhances the capability of crops in resisting plant diseases and insect pests and lodging, and improves the productivity of unit land area. However, the problems of unreasonable light and temperature resource matching, un-combination of land cultivation and the like exist in production, particularly in the planting of corns and soybeans, and the sustainable development is not facilitated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, a method for planting corn and soybean in a mixed mode is provided.
In order to solve the technical problem, the technical scheme of the invention is as follows:
a method for mixed planting of corn and soybean comprises the following steps:
(1) carrying out deep rotary tillage on the soil, loosening the soil of a plough layer and a plough bottom layer, crushing, mixing and paving the mixture;
(2) the corn belt, the soybean belt, the corn belt and the alfalfa belt which are sequentially arranged are used as one space, a plurality of spaces are sequentially planted, the corn is planted in four rows as one space, the soybean and the alfalfa are planted in two rows as one space, wherein the row spacing of the corn in the corn belt is 65cm, the row spacing of the soybean in the soybean belt is 30cm, and the row spacing of the alfalfa in the alfalfa belt is 30 cm;
(3) selecting seeds with bright grain color and luster, and regular and consistent grain size and shape for both corn and soybean;
(4) planting alfalfa, corn and soybean in late May days;
(5) harvesting soybeans in the first ten days of September, harvesting corns in the first ten days of October, and not harvesting alfalfa;
(6) in spring ploughing, the alfalfa is turned into a plough layer, and sowing of the alfalfa, the corn and the soybean is repeated.
Preferably, the distance between adjacent corn and soybean is 30cm, the distance between adjacent alfalfa and corn is 30cm, and the width between two webs is 570 cm.
Preferably, the spacing between corn plants in the same row is 14-18 cm, the spacing between soybean plants is 9-15 cm, and the spacing between alfalfa plants is 6-12 cm.
Preferably, a slow release fertilizer is applied during planting, and the slow release fertilizer comprises the following raw materials in parts by weight: 16-20 parts of alfalfa powder, 22-26 parts of soybean stalks, 12-20 parts of dried fish, 40-48 parts of urea, 32-40 parts of monopotassium phosphate, 30-38 parts of diammonium phosphate, 20-27 parts of mineral source humus ultrafine powder and 0.4-1.2 parts of particle coating.
Preferably, the particle coating is a graft copolymer of starch and phenols.
Preferably, preparation method of particle coating in slow release fertilizerComprises the following steps: 50g of distilled water and 5g of starch are gelatinized for 10min at high temperature, the mixture is cooled to room temperature, phosphate buffer solution is added to control the pH of the system to be 7.0, 7g of hydroquinone, 10g of sodium phenolsulfonate and 5mgHRP are added, the constant temperature is kept at 30 ℃, and 5g H is added2O2And stopping the reaction after 4 hours to obtain the starch and phenol graft copolymer.
Preferably, the preparation method of the slow release fertilizer comprises the following steps:
a: dissolving half weight of the granule coating in an organic solvent, placing in an electrostatic spray gun, crushing half weight of potassium dihydrogen phosphate, placing in a granulator, and performing electrostatic spraying to obtain granules 1;
b: adding a half weight of diammonium phosphate into a melter, supplying heat through a steam boiler, melting the diammonium phosphate into slurry 1, pressurizing by a centrifugal pump, atomizing and spraying the slurry 1 onto a material curtain in a rotary drum granulator, and placing the granules 1 in the granulator to obtain granules 2;
C: dissolving the rest half of the particle coating in an organic solvent, placing the solution in an electrostatic spray gun, placing the particles 2 in a rotary receiving device, and obtaining particles 3 through electrostatic spraying;
d: crushing mineral humus at normal temperature and normal pressure by a grinding machine, adjusting by an air current classifier to obtain mineral humus ultrafine powder with the particle size of 1-20 microns, crushing alfalfa powder, soybean stalks and dried fish by the grinding machine, mixing the crushed powder with the mineral humus ultrafine powder to obtain a powder mixed material 1, and forcefully and uniformly mixing the remaining half weight of monopotassium phosphate, the remaining half weight of diammonium phosphate, the half weight of urea powder and the powder mixed material 1 by a mixer to obtain a mixed material;
e: placing the mixed material in the step E in a granulator, continuously adding the rest half of urea by weight into a urea melting device, providing heat through a steam boiler, melting the urea into urea slurry, pressurizing through a centrifugal pump, atomizing the urea slurry, spraying the atomized urea slurry onto a material curtain in a rotary drum granulator, and spraying to obtain spherical particles;
f: and D, conveying the spherical particles obtained in the step E to a rotary dryer, then conveying the spherical particles to a thermal screening machine for screening, conveying the particles with the particle size of 3.0-5.0 mm to a rotary cooler, and cooling by natural cold air or strong cold air to obtain the slow release fertilizer.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the row spacing of the corn is properly increased, so that the soybean can be illuminated sufficiently, and the condition of reducing yield caused by insufficient illumination can be avoided.
2. The higher corns are respectively adjacent to the shorter soybeans and the alfalfa, the illumination effect and the ventilation effect are good, the survival rate of the corns is high, and meanwhile, the finally obtained corns are high in yield.
3. The alfalfa does not need to be harvested, can be covered with soil in winter to play a role in preventing wind erosion, and can be turned into a plough layer to improve the fertility in spring ploughing.
4. The fertility of the slow release fertilizer is divided into three sections which respectively correspond to the seedling stage, the jointing stage and the heading stage of the corn, and the whole process is used for fertilizing once, so that the fertilizing times are greatly reduced, and the cost is saved.
5. The outermost layer of the slow release fertilizer provides required nitrogen, phosphorus and potassium for the seedling stage, the slow release fertilizer takes effect quickly, after 1 and a half months, the first layer of particle coating is damaged, the diammonium phosphate plays a role in supplementing the nitrogen and the phosphorus required in the stage, the second layer of particle coating is damaged in about 3 months, the monopotassium phosphate supplements a potassium fertilizer required in the heading stage, the fertilizer efficiency runs through the whole growth cycle of the corn, and the yield of the corn is improved.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
A method for planting corn and soybean in a mixed mode comprises the following steps:
(1) carrying out deep rotary tillage on the soil, loosening the soil of a plough layer and a plough bottom layer, crushing, mixing and paving the mixture;
(2) the corn belt, the soybean belt, the corn belt and the alfalfa belt which are sequentially arranged are used as one space, a plurality of spaces are sequentially planted, the corn is planted in four rows as one space, the soybean and the alfalfa are planted in two rows as one space, wherein the row spacing of the corn in the corn belt is 65cm, the row spacing of the soybean in the soybean belt is 30cm, and the row spacing of the alfalfa in the alfalfa belt is 30 cm;
(3) selecting seeds with bright grain color and luster, and regular and consistent grain size and shape for both corn and soybean;
(4) simultaneously planting alfalfa, corn and soybean in late May ten days;
(5) harvesting soybeans in the first ten days of September, harvesting corns in the first ten days of October, and not harvesting alfalfa;
(6) in spring ploughing, the alfalfa is turned into a plough layer, and sowing of the alfalfa, the corn and the soybean is repeated.
The distance between adjacent corns and soybeans is 30cm, the distance between adjacent alfalfa and corns is 30cm, and the width between every two adjacent corns is 570 cm.
The plant spacing of the corns in the same row is 14-18 cm, the plant spacing of the soybeans is 9-15 cm, and the plant spacing of the alfalfa is 6-12 cm.
Example 2
In the method for planting corn and soybean in a mixed mode in the embodiment 1, a slow release fertilizer is applied during planting, and the slow release fertilizer comprises the following raw materials in parts by weight: 16 parts of alfalfa powder, 22 parts of soybean stalks, 12 parts of dried fish, 40 parts of urea, 32 parts of monopotassium phosphate, 30 parts of diammonium phosphate, 20 parts of mineral source humus ultrafine powder and 0.4 part of particle coating.
The preparation method of the slow release fertilizer comprises the following steps:
a: dissolving half weight of the granule coating in an organic solvent, placing in an electrostatic spray gun, crushing half weight of potassium dihydrogen phosphate, placing in a granulator, and performing electrostatic spraying to obtain granules 1;
b: adding a half weight of diammonium phosphate into a melter, supplying heat through a steam boiler, melting the diammonium phosphate into slurry 1, pressurizing by a centrifugal pump, atomizing and spraying the slurry 1 onto a material curtain in a rotary drum granulator, and placing the granules 1 in the granulator to obtain granules 2;
c: dissolving the rest half of the particle coating in organic solvent, placing the solution in an electrostatic spray gun, placing the particles 2 in a rotary collecting device, and obtaining particles 3 through electrostatic spraying;
d: crushing mineral humus at normal temperature and normal pressure by a grinder, adjusting by an airflow classifier to obtain mineral humus ultrafine powder with the particle size of 1-20 microns, crushing alfalfa powder, soybean stalks and dried fish by the grinder, mixing the crushed alfalfa powder, the soybean stalks and the dried fish with the mineral humus ultrafine powder to obtain a powder mixed material 1, and intensively and uniformly mixing the remaining half weight of monopotassium phosphate, the remaining half weight of diammonium phosphate, the half weight of urea powder and the powder mixed material 1 by a mixer to obtain a mixed material;
E: placing the mixed material in the step E in a granulator, continuously adding the rest half of urea by weight into a urea melting device, providing heat through a steam boiler, melting the urea into urea slurry, pressurizing through a centrifugal pump, atomizing the urea slurry, spraying the atomized urea slurry onto a material curtain in a rotary drum granulator, and spraying to obtain spherical particles;
f: and E, conveying the spherical particles obtained in the step E to a rotary dryer, then conveying the spherical particles to a thermal screening machine for screening, conveying the particles with the particle size of 3.0-5.0 mm to a rotary cooler, and cooling by natural cold air or strong cold air to obtain the slow release fertilizer.
The preparation method of the particle coating in the slow release fertilizer comprises the following steps: 50g of distilled water and 5g of starch are gelatinized for 10min at high temperature, the mixture is cooled to room temperature, phosphate buffer solution is added to control the pH of the system to be 7.0, 7g of hydroquinone, 10g of sodium phenolsulfonate and 5mgHRP are added, the constant temperature is kept at 30 ℃, and 5g H is added2O2And stopping the reaction after 4 hours to obtain the starch and phenol graft copolymer.
Example 3
In the method for planting corn and soybean in a mixed mode in the embodiment 1, a slow release fertilizer is applied during planting, and the slow release fertilizer comprises the following raw materials in parts by weight: 18 parts of alfalfa meal, 24 parts of soybean stalks, 16 parts of dried fish, 44 parts of urea, 36 parts of monopotassium phosphate, 34 parts of diammonium phosphate, 24 parts of mineral source humus ultrafine powder and 0.8 part of particle coating.
The preparation method of the slow release fertilizer comprises the following steps:
a: dissolving half weight of the granule coating in an organic solvent, placing in an electrostatic spray gun, crushing half weight of potassium dihydrogen phosphate, placing in a granulator, and performing electrostatic spraying to obtain granules 1;
b: adding a half weight of diammonium phosphate into a melter, supplying heat through a steam boiler, melting the diammonium phosphate into slurry 1, pressurizing by a centrifugal pump, atomizing and spraying the slurry 1 onto a material curtain in a rotary drum granulator, and placing the granules 1 in the granulator to obtain granules 2;
c: dissolving the rest half of the particle coating in organic solvent, placing the solution in an electrostatic spray gun, placing the particles 2 in a rotary collecting device, and obtaining particles 3 through electrostatic spraying;
d: crushing mineral humus at normal temperature and normal pressure by a grinder, adjusting by an airflow classifier to obtain mineral humus ultrafine powder with the particle size of 1-20 microns, crushing alfalfa powder, soybean stalks and dried fish by the grinder, mixing the crushed alfalfa powder, the soybean stalks and the dried fish with the mineral humus ultrafine powder to obtain a powder mixed material 1, and intensively and uniformly mixing the remaining half weight of monopotassium phosphate, the remaining half weight of diammonium phosphate, the half weight of urea powder and the powder mixed material 1 by a mixer to obtain a mixed material;
E: placing the mixed material in the step E in a granulator, continuously adding the rest half of urea by weight into a urea melter, providing heat through a steam boiler, melting the urea into urea slurry, pressurizing the urea slurry through a centrifugal pump, atomizing the urea slurry and spraying the urea slurry onto a material curtain in a drum granulator, and spraying to obtain spherical particles;
f: and D, conveying the spherical particles obtained in the step E to a rotary dryer, then conveying the spherical particles to a thermal screening machine for screening, conveying the particles with the particle size of 3.0-5.0 mm to a rotary cooler, and cooling by natural cold air or strong cold air to obtain the slow release fertilizer.
The preparation method of the particle coating in the slow release fertilizer comprises the following steps: 50g of distilled water and 5g of starch are gelatinized for 10min at high temperature, the mixture is cooled to room temperature, phosphate buffer solution is added to control the pH of the system to be 7.0, then 7g of hydroquinone, 10g of sodium phenolsulfonate and 5mgHRP are added, the constant temperature is kept at 30 ℃, and 5g H is added2O2And stopping the reaction after 4 hours to obtain the starch and phenol graft copolymer.
Example 4
In the method for planting corn and soybean in a mixed mode in the embodiment 1, a slow release fertilizer is applied during planting, and the slow release fertilizer comprises the following raw materials in parts by weight: 20 parts of alfalfa powder, 26 parts of soybean stalks, 20 parts of dried fish, 48 parts of urea, 40 parts of monopotassium phosphate, 38 parts of diammonium phosphate, 27 parts of mineral source humus ultrafine powder and 1.2 parts of particle coating.
The preparation method of the slow release fertilizer comprises the following steps:
a: dissolving half weight of the granule coating in an organic solvent, placing in an electrostatic spray gun, crushing half weight of potassium dihydrogen phosphate, placing in a granulator, and performing electrostatic spraying to obtain granules 1;
b: adding a half weight of diammonium phosphate into a melter, supplying heat through a steam boiler, melting the diammonium phosphate into slurry 1, pressurizing by a centrifugal pump, atomizing and spraying the slurry 1 onto a material curtain in a rotary drum granulator, and placing the granules 1 in the granulator to obtain granules 2;
c: dissolving the rest half of the particle coating in organic solvent, placing the solution in an electrostatic spray gun, placing the particles 2 in a rotary collecting device, and obtaining particles 3 through electrostatic spraying;
d: crushing mineral humus at normal temperature and normal pressure by a grinder, adjusting by an airflow classifier to obtain mineral humus ultrafine powder with the particle size of 1-20 microns, crushing alfalfa powder, soybean stalks and dried fish by the grinder, mixing the crushed alfalfa powder, the soybean stalks and the dried fish with the mineral humus ultrafine powder to obtain a powder mixed material 1, and intensively and uniformly mixing the remaining half weight of monopotassium phosphate, the remaining half weight of diammonium phosphate, the half weight of urea powder and the powder mixed material 1 by a mixer to obtain a mixed material;
E: placing the mixed material in the step E in a granulator, continuously adding the rest half of urea by weight into a urea melter, providing heat through a steam boiler, melting the urea into urea slurry, pressurizing the urea slurry through a centrifugal pump, atomizing the urea slurry and spraying the urea slurry onto a material curtain in a drum granulator, and spraying to obtain spherical particles;
f: and D, conveying the spherical particles obtained in the step E to a rotary dryer, then conveying the spherical particles to a thermal screening machine for screening, conveying the particles with the particle size of 3.0-5.0 mm to a rotary cooler, and cooling by natural cold air or strong cold air to obtain the slow release fertilizer.
The preparation method of the particle coating in the slow release fertilizer comprises the following steps: 50g of distilled water and 5g of starch are gelatinized for 10min at high temperature, the mixture is cooled to room temperature, phosphate buffer solution is added to control the pH of the system to be 7.0, then 7g of hydroquinone, 10g of sodium phenolsulfonate and 5mgHRP are added, the constant temperature is kept at 30 ℃, and 5g H is added2O2And stopping the reaction after 4 hours to obtain the starch and phenol graft copolymer.
Selecting an experimental field of a Tokyo village in Togao village of Tokyo district in Beijing, and planting corn, soybean and alfalfa according to the method in the embodiment 1, wherein the corn varieties are as follows: dongdui 6531, soybean variety: the rice spring soybeans. The test field was divided into four portions, three of which were applied with the slow release fertilizers of examples 2-4, respectively, at an application rate of 60 kg/acre, all applied 20 days after corn sowing. And fourthly, applying the neutralized urea produced by Yangtze coal plain chemical industry Co., Ltd at 20 days after the corn is sowed, wherein the application rate is 40 kg/mu, performing topdressing at the heading stage, applying the potassium dihydrogen phosphate fertilizer produced by Shandong Xin Ruijie biological technology Co., Ltd, and the application rate is 20 kg/mu, and taking the fourth test field as a comparative example to obtain the following results through the examples and the comparative example:
TABLE 1
As can be seen from the table, compared with the common fertilization mode, the corn and soybean mixed planting method and the slow release fertilizer of the invention have the advantages that the corn and soybean yield is higher, the whole growth period only needs one fertilization, and the labor force is saved.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention can be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the claims appended to the present application.
Claims (7)
1. A method for planting corn and soybeans in a mixed mode is characterized by comprising the following steps:
(1) carrying out deep rotary tillage on the soil, loosening the soil of a plough layer and a plough bottom layer, crushing, mixing and paving the mixture;
(2) the corn belt, the soybean belt, the corn belt and the alfalfa belt which are sequentially arranged are used as one space, a plurality of spaces are sequentially planted, the corn is planted in four rows as one space, the soybean and the alfalfa are planted in two rows as one space, wherein the row spacing of the corn in the corn belt is 65cm, the row spacing of the soybean in the soybean belt is 30cm, and the row spacing of the alfalfa in the alfalfa belt is 30 cm;
(3) Selecting seeds with bright grain color and luster, and regular and consistent grain size and grain shape for both the corn and the soybean;
(4) planting alfalfa, corn and soybean in late May days;
(5) harvesting soybeans in the first ten days of September, harvesting corns in the first ten days of October, and not harvesting alfalfa;
(6) in spring ploughing, the alfalfa is turned into a plough layer, and sowing of the alfalfa, the corn and the soybean is repeated.
2. The method for mixed planting of corn and soybean as claimed in claim 1, wherein: the distance between adjacent corns and soybeans is 30cm, the distance between adjacent alfalfa and corns is 30cm, and the width between every two adjacent corns is 570 cm.
3. The method for mixed planting of corn and soybean as claimed in claim 1, wherein: the plant spacing of the corns in the same row is 14-18 cm, the plant spacing of the soybeans is 9-15 cm, and the plant spacing of the alfalfa is 6-12 cm.
4. The method for mixed planting of corn and soybean according to claim 1, wherein the slow release fertilizer is applied during planting, and the slow release fertilizer comprises the following raw materials in parts by weight: 16-20 parts of alfalfa powder, 22-26 parts of soybean stalks, 12-20 parts of dried fish, 40-48 parts of urea, 32-40 parts of monopotassium phosphate, 30-38 parts of diammonium phosphate, 20-27 parts of mineral source humus ultrafine powder and 0.4-1.2 parts of particle coating.
5. The method for mixed planting of corn and soybean according to claim 4, wherein: the particle coating is a graft copolymer of starch and phenols.
6. The method for mixed planting of corn and soybean according to claim 5, wherein the preparation method of the particle coating in the slow release fertilizer comprises the following steps: 50g of distilled water and 5g of starch are gelatinized for 10min at high temperature, the mixture is cooled to room temperature, phosphate buffer solution is added to control the pH of the system to be 7.0, then 7g of hydroquinone, 10g of sodium phenolsulfonate and 5mgHRP are added, the constant temperature is kept at 30 ℃, and 5g H is added2O2And stopping the reaction after 4 hours to obtain the starch and phenol graft copolymer.
7. The method for mixed planting of corn and soybean according to claim 4, wherein the slow release fertilizer is prepared by the following steps:
a: dissolving half weight of the granule coating in an organic solvent, placing in an electrostatic spray gun, crushing half weight of potassium dihydrogen phosphate, placing in a granulator, and performing electrostatic spraying to obtain granules 1;
b: adding a half weight of diammonium phosphate into a melter, supplying heat through a steam boiler, melting the diammonium phosphate into slurry 1, pressurizing by a centrifugal pump, atomizing and spraying the slurry 1 onto a material curtain in a rotary drum granulator, and placing the granules 1 in the granulator to obtain granules 2;
C: dissolving the rest half of the particle coating in an organic solvent, placing the solution in an electrostatic spray gun, placing the particles 2 in a rotary receiving device, and obtaining particles 3 through electrostatic spraying;
d: crushing mineral humus at normal temperature and normal pressure by a grinder, adjusting by an airflow classifier to obtain mineral humus ultrafine powder with the particle size of 1-20 microns, crushing alfalfa powder, soybean stalks and dried fish by the grinder, mixing the crushed alfalfa powder, the soybean stalks and the dried fish with the mineral humus ultrafine powder to obtain a powder mixed material 1, and intensively and uniformly mixing the remaining half weight of monopotassium phosphate, the remaining half weight of diammonium phosphate, the half weight of urea powder and the powder mixed material 1 by a mixer to obtain a mixed material;
e: placing the mixed material in the step E in a granulator, continuously adding the rest half of urea by weight into a urea melting device, providing heat through a steam boiler, melting the urea into urea slurry, pressurizing through a centrifugal pump, atomizing the urea slurry, spraying the atomized urea slurry onto a material curtain in a rotary drum granulator, and spraying to obtain spherical particles;
f: and E, conveying the spherical particles obtained in the step E to a rotary dryer, then conveying the spherical particles to a thermal screening machine for screening, conveying the particles with the particle size of 3.0-5.0 mm to a rotary cooler, and cooling by natural cold air or strong cold air to obtain the slow release fertilizer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115250847A (en) * | 2022-08-30 | 2022-11-01 | 巴中市巴州区农业技术推广中心 | Method for planting soybeans between konjak sleeved with corn |
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| CN1646451A (en) * | 2002-03-26 | 2005-07-27 | 佐治亚-太平洋树脂公司 | Slow release nitrogen fertilizer |
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