Slowly-soluble fertilizer and preparation method thereof

A slow-dissolving and preparation technology, applied in fertilization equipment, fertilizer mixture, application, etc., can solve the problems of complex production process, high cost, low utilization rate, etc., achieve simple and controllable process flow, improve utilization rate, and high production efficiency Effect

Active Publication Date: 2015-06-10
河北润泽致民农业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of my country's agriculture, chemical fertilizers play an increasingly important role in agriculture. There are two main problems in the use of chemical fertilizers: one is the large amount of fertilizer application and low utilization rate, and the other is pollution to the soil.
Although this method can achieve controlled release of fertilizers, the production process is complicated and the cost is high, which is not conducive to popularization
[0007] According to the above, my country's slow-control fertilizers mainly have unstable fertilizer release cycles, and the fertilizer release rate cannot match the crop growth cycle, which reduces the utilization rate of fertilizers, and the production process is complicated, and it is easy to cause secondary pollution to the soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of slow-dissolving fertilizer, its component ratio is as follows, and each component is weight part:

[0035] 40% urea, 30% ammonium hydrogen phosphate, 20% polyvinyl alcohol 1799, 5% anionic polyurethane resin, 4% tamarind polysaccharide gum, 1% zeolite.

[0036] The preparation method steps are as follows:

[0037] (1) Refining 1% of the permeability control agent zeolite into 400-800 mesh particles for later use;

[0038] (2) Add the refined zeolite particles of the permeability control agent obtained in step (1) into the closed stirred reactor, then add 40% urea, 30% ammonium monohydrogen phosphate, 20% polyvinyl alcohol 1799, 5 % anionic polyurethane resin, 4% tamarind polysaccharide gum, add 10%~20% water, set the temperature and keep it at 70°C~100°C, the stirring speed is 200r / min~300r / min, and the stirring time is 50min~120min Bring the mixture to a molten state;

[0039] (3) Send the mixture in step (2) into a granulator for spray granulation, dry an...

Embodiment 2

[0043] A kind of slow-dissolving fertilizer, its component ratio is as follows, and each component is weight part:

[0044] 65% ammonium dihydrogen phosphate, 25% polyvinyl alcohol 1799, 5% anionic polyurethane resin, 4% tamarind polysaccharide glue, 1% attapulgite.

[0045] The preparation method steps are as follows:

[0046] (1) Thin 1% attapulgite of the permeability control agent into 400-800 mesh particles for later use;

[0047] (2) Add the refined attapulgite of the permeability control agent obtained in step (1) into the closed stirring reactor, then add 65% ammonium dihydrogen phosphate, 25% polyvinyl alcohol 1799, 5% anionic polyurethane Resin, 4% tamarind polysaccharide gum, add 10%~20% water, set the temperature and keep it at 70℃~100℃, the stirring speed is 200r / min~300r / min, and the stirring time is 50min~120min to make the mixture reach melting state;

[0048] (3) Send the mixture in step (2) into a granulator for spray granulation, dry and cool to obtain a sl...

Embodiment 3

[0052] A kind of slow-dissolving fertilizer, its component ratio is as follows, and each component is weight part:

[0053] 40% urea, 20% ammonium hydrogen phosphate, 10% potassium chloride, 20% polyvinyl alcohol 1799, 5% polyurethane resin, 3% tamarind polysaccharide gum, 2% diatomaceous earth.

[0054] The preparation method steps are as follows:

[0055] (1) Finely refine 2% of the permeability control agent diatomaceous earth into 400-800 mesh particles for later use;

[0056] (2) Add diatomaceous earth, a refined permeability control agent obtained in step (1), into a closed stirred reactor, and then add 40% urea, 20% ammonium monohydrogen phosphate, 10% potassium chloride, 20 % polyvinyl alcohol 1799, 5% anionic polyurethane resin, 3% tamarind polysaccharide glue, add 10%~20% water, set the temperature and keep it at 70°C~100°C, and the stirring speed is 200r / min~300r / min , the stirring time is 50min~120min to make the mixture reach a molten state;

[0057] (3) Send t...

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Abstract

The invention discloses a slowly-soluble fertilizer, belongs to the field of crop fertilizers and specifically relates to a fertilizer capable of being slowly dissolved in water and soil to achieve a controlled release purpose. The slowly-soluble fertilizer consists of nutrient elements and materials in different dissolution rates. Furthermore, the invention provides a preparation method of the slowly-soluble fertilizer, wherein the method comprises the steps of fusing, dispersing, guniting and pelletizing the nutrient elements, the materials in different dissolution rates and a permeation control agent. The slowly-soluble fertilizer utilizes the materials in different dissolution rates and the permeation control agent to slowly release the fertilizer, so that the controlled release purpose is achieved. The slowly-soluble fertilizer disclosed by the invention has an easily controllable preparation process, low cost, and stable fertilizer effect and controlled release, can be adaptive to the crop growth rule, so that utilization rate of the fertilizer is improved, and market promotion value is achieved.

Description

technical field [0001] The invention belongs to the field of fertilizers for crops, and more precisely relates to a slow-dissolving fertilizer. Background technique [0002] With the rapid development of my country's agriculture, chemical fertilizers play an increasingly important role in agriculture. There are two main problems in the use of chemical fertilizers: one is the large amount of fertilizer application and low utilization rate, and the other is pollution to the soil. . In this way, solving the problems of fertilizer utilization rate and soil pollution has become an important object of fertilizer research. [0003] At present, the domestic solution to the above problems is mainly the use of solid long-acting slow-control fertilizers. There are many types of solid long-acting slow-control fertilizers in my country, but most of these products have large particle size and uncertain release time, which cannot be fully utilized, reducing the utilization rate. For examp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 陈庆张芝媛
Owner 河北润泽致民农业科技股份有限公司
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