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Preparation method of water-retention and nitrogen-fixation slow release water-soluble fertilizer

A nitrogen-fixing and water-soluble technology, applied in the chemical industry, can solve problems such as excessive fertilization and hazards, and achieve the effects of promoting crop growth and development, increasing crop yield, improving permeability and drought resistance

Inactive Publication Date: 2016-11-09
周保东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual operation, people simply increase the amount of fertilizer in order to increase food production will inevitably lead to the problem of excessive fertilization, which will lead to some harmful results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the present embodiment provides a kind of preparation method of water-retaining nitrogen-fixing slow-release water-soluble fertilizer, comprises the following steps: (1) firstly nitrogen fertilizer, macromolecule material, water-retaining agent and filling material are stirred and preliminarily mixed to obtain nitrogen fertilizer mixture a, which One step can be simplified, directly mixing the nitrogen fertilizer, polymer material, water retaining agent and filler without stirring; (2) Then add the nitrogen fertilizer mixture a into the solid-liquid mixer and continue stirring and mixing, controlling the stirring speed Add water and additives under changing conditions for preliminary kneading to obtain semi-dry powder granular material b. The order in which water and additives are added is indifferent, they can be added at the same time or separately. (3) Then add the semi-dry powder granular material b into the extrusion kneading device, add water to knea...

Embodiment 2

[0024] Embodiment 2, the present embodiment provides a kind of preparation method of water-retaining, nitrogen-fixing, slow-release water-soluble fertilizer, comprising the following steps: (1) first, nitrogen fertilizer, macromolecule material, water-retaining agent and filling material are stirred and preliminarily mixed to obtain nitrogen fertilizer mixture a, which One step can be simplified, directly mixing the nitrogen fertilizer, polymer material, water retaining agent and filler without stirring; (2) Then add the nitrogen fertilizer mixture a into the solid-liquid mixer and continue stirring and mixing, controlling the stirring speed Add water and additives under changing conditions for preliminary kneading to obtain semi-dry powder granular material b. The order in which water and additives are added is indifferent, they can be added at the same time or separately. (3) Then add the semi-dry powder granular material b into the extrusion kneading device, add water to kn...

Embodiment 3

[0026] Embodiment 3, the present embodiment provides a kind of preparation method of water-retaining nitrogen-fixing slow-release water-soluble fertilizer, comprises the following steps: (1) firstly nitrogen fertilizer, macromolecule material, water-retaining agent and filling material are stirred and preliminarily mixed to obtain nitrogen fertilizer mixture a, which One step can be simplified, directly mixing the nitrogen fertilizer, polymer material, water retaining agent and filler without stirring; (2) Then add the nitrogen fertilizer mixture a into the solid-liquid mixer and continue stirring and mixing, controlling the stirring speed Add water and additives under changing conditions for preliminary kneading to obtain semi-dry powder granular material b. The order in which water and additives are added is indifferent, they can be added at the same time or separately. (3) Then add the semi-dry powder granular material b into the extrusion kneading device, add water to knea...

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Abstract

The invention belongs to the field of chemical engineering, and relates to a preparation method of a water-retention and nitrogen-fixation slow release water-soluble fertilizer. The method comprises the following steps: preliminarily mixing a nitrogen fertilizer, a high-molecular material, a water retaining agent and a filler, adding above preliminarily mixed materials to a solid-liquid mixer, continuously stirring and mixing the preliminarily mixed materials, adding water and auxiliary agents at a constant stirring rate, carrying out preliminary kneading, adding the above obtained mixture to an extruding and kneading device, adding water, carrying out secondary kneading to prepare a paste, continuously sending the paste to a granulator, granulating the paste, drying prepared granules, sieving the dried granules, and packaging the sieved granules to obtain the final water-retention and nitrogen-fixation slow release water-soluble fertilizer. The high-molecular material polyacrylamide is effectively added to a chemical fertilizer in order to reduce soil erosion and effectively improve the soil structure, so the total porosity and the capillary porosity of the soil are increased, and the soil capacity is reduced, thereby soil granules and the pore structure keep stable. Polypropionamide substantially inhibits the loss of the nitrogen element and improves the nitrogen fertilizer utilization rate.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a method for preparing chemical fertilizers, in particular to a method for preparing water-retaining, nitrogen-fixing, slow-release water-soluble fertilizers. Background technique [0002] For a long time, the fertilizers used in agricultural production, especially chemical fertilizers, are all water-soluble fertilizers, and water-soluble fertilizers are all quick-acting fertilizers, especially urea nitrogen fertilizers. In actual application, it is easy to cause environmental pollution due to the influence of the product's own performance and the ambient temperature and humidity. [0003] Nitrogen fertilizer is a chemical fertilizer containing the crop nutrient element nitrogen. The element nitrogen plays a very important role in the growth of crops. It is a component of amino acids in plants, a component of protein, and a component of chlorophyll that plays a decisive role in pho...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/04C05G3/00C05G3/80C05G3/90
CPCC05C1/00C05C3/00C05C9/00C05G3/00C05G3/80C05G3/90C05G5/12C05D9/00
Inventor 周保东孙文国周传焯
Owner 周保东
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