Preparation method of multilayer-coated slow release fertilizer for wheat

A technology of coated slow-release and wheat, which is applied in the preparation of organic fertilizers, layered/coated fertilizers, nitrogen fertilizers, etc., can solve the problems of difficult degradation of coated materials, restrictions on large-scale use, and expensive coated fertilizers. Facilitate absorption, improve soil nutrient status, prevent premature aging and defertilization

Inactive Publication Date: 2017-02-08
ANHUI SIERTE FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In response to these problems, a variety of coated slow-release fertilizers have been developed at home and abroad. Although the release of nutrient elements can be controlled to a cert

Method used

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  • Preparation method of multilayer-coated slow release fertilizer for wheat

Examples

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Comparison scheme
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Example Embodiment

[0023] Example 1

[0024] In this embodiment, a method for preparing a wheat multi-layer coated slow-release fertilizer includes the following steps:

[0025] S1. Mix nitrogen fertilizer, 2-chloro-6-trichloromethyl pyridine, diammonium phosphate, potassium sulfate, middle and trace element fertilizer, kaolin and modified cassava flour, and send them to a granulator for production after crushing. Granules to obtain core granules;

[0026] S2. The concentrated sulfuric acid, phosphoric acid and liquid ammonia are subjected to a maturation reaction to obtain a slurry, the slurry is sprayed into a granulator, and the core particles obtained by adding S1 are granulated to obtain particles with an inner coating layer, and then Dry, sieving to a particle size of 3-4mm;

[0027] S3. After humidifying the particles with the inner coating layer obtained in S2, they are sent to the granulator, and the outer coating material is added for granulation to obtain the particles with the outer coating...

Example Embodiment

[0033] Example 2

[0034] In this embodiment, a preparation method of a wheat multilayer coated slow-release fertilizer includes the following steps:

[0035] S1. Mix nitrogen fertilizer, nitrogen fertilizer synergist, phosphate fertilizer, potash fertilizer, medium and trace element fertilizer, auxiliary materials and modified cassava flour, crush them and send them to a granulator for granulation to obtain core particles;

[0036] S2. The concentrated sulfuric acid, phosphoric acid and liquid ammonia are subjected to a maturation reaction to obtain a slurry, the slurry is sprayed into a granulator, and the core particles obtained by adding S1 are granulated to obtain particles with an inner coating layer, and then Dry and sieving to a particle size of 3-4mm;

[0037] S3. After humidifying the particles with the inner coating layer obtained in S2, they are sent to the granulator, and the outer coating material is added for granulation to obtain the particles with the outer coating la...

Example Embodiment

[0043] Example 3

[0044] In this embodiment, a method for preparing a wheat multi-layer coated slow-release fertilizer includes the following steps:

[0045] S1. Mix organic nitrogen fertilizer, inorganic nitrogen fertilizer, nitrogen fertilizer synergist, phosphate fertilizer, potash fertilizer, middle and trace element fertilizer, auxiliary materials and modified cassava flour, crush them and send them to a granulator for granulation to obtain core particles ;

[0046] S2. The concentrated sulfuric acid, phosphoric acid and liquid ammonia are subjected to a maturation reaction to obtain a slurry, the slurry is sprayed into a granulator, and the core particles obtained by adding S1 are granulated to obtain particles with an inner coating layer, and then Dry, sieving to a particle size of 3-4mm;

[0047] S3. After humidifying the particles with the inner coating layer obtained in S2, they are sent to the granulator, and the outer coating material is added for granulation to obtain t...

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Abstract

The invention discloses a preparation method of a multilayer-coated slow release fertilizer for wheat. The preparation method comprises the following steps: uniformly mixing a nitrogen fertilizer, a nitrogenous fertilizer synergist, a phosphate fertilizer, a potash fertilizer, medium trace element fertilizer and auxiliary materials, adding modified cassava powder as a binder, crushing, and granulating to obtain core particles; carrying out aging reaction on concentrated sulfuric acid, phosphoric acid and liquefied ammonia to obtain slurry, coating the core particles with the slurry as an internal coating material so as to form particles with the internal coating layer; humidifying the particles with the internal coating layer, adding an external coating material to uniformly coat the particles with the internal coating layer so as to obtain particles with an external coating layer, drying, polishing, and sieving to obtain the multilayer-coated slow release fertilizer for wheat. The multilayer-coated slow release fertilizer for wheat can fully supply wheat with nutrients. The supply of nutrients is lasting and harmonious, and release of nutrient elements can be controlled. Topdressing is not required by one-time fertilization. By the use of the fertilizer, quality and yield of wheat are remarkably enhanced.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a preparation method of wheat multilayer-coated slow-release fertilizer. Background technique [0002] Wheat is one of the most important food crops in the world. It is rich in starch, protein and fat, and is also an important source of energy for the human body. About one-third of the world's population uses wheat as a staple food. Countries with high wheat yield per unit area in the world include France, Germany, the United Kingdom, the Netherlands, Denmark, etc., with a yield level of 6500-8200kg.hm2, which is about 2.5-3.0% of the world's average yield times. [0003] In my country, wheat is the second largest food crop after rice. According to the region and production layout, the main production areas are divided into northeast spring wheat area, northwest wheat area, north China winter wheat area, winter wheat area in the middle and lower reaches of the Yangtze River ...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/00C05G3/80
CPCC05B7/00C05F5/006C05G3/00C05G3/80C05G5/30C05C3/00C05C9/00C05D1/02C05D3/00C05D5/00C05D9/00C05D9/02C05F9/04C05F11/00C05F11/02C05F5/008C05F17/00
Inventor 金政辉董慧徐为宁宋先懿
Owner ANHUI SIERTE FERTILIZER IND
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