Modified polymer slow-release nitro-compound fertilizer and preparation method thereof

A nitro compound fertilizer and polymer technology, applied in the direction of ammonium nitrate fertilizer, layered/coated fertilizer, alkaline orthophosphate fertilizer, etc., can solve the problems of low utilization rate of nitrogen fertilizer, nitrate nitrogen leaching, environmental pollution, etc. problems, to achieve the effect of comprehensive nutrient absorption, low cost, and improved disease resistance

Pending Publication Date: 2021-03-26
NANYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In agricultural production practice, the most common problem in nitrogen fertilizer application is low utilization rate
According to statistics, our country averages about 180kg / hm per year 2 The nitrogen (N) in the soil is lost in the environment through ammonia volatilization, nitrification and denitrification, and the nitrogen accumulated in the soil mainly exists in the form of nitrate nitrogen, which is very easy to cause nitrate nitrogen leaching, which will not only cause economic losses A large amount of loss, but also cause serious pollution to the environment

Method used

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  • Modified polymer slow-release nitro-compound fertilizer and preparation method thereof
  • Modified polymer slow-release nitro-compound fertilizer and preparation method thereof
  • Modified polymer slow-release nitro-compound fertilizer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] Modified macromolecule slow-release nitro compound fertilizer, including the following raw materials: grafted polyacrylamide 5kg, mushroom residue biochar 10kg, polymethylene polyphenyl polyisocyanate 2kg and base fertilizer 83kg;

[0048] Among them, the grafted polyacrylamide is prepared from polyacrylamide, formaldehyde and N,N'methylenebisacrylamide with a mass ratio of 4:0.02:0.1;

[0049] The preparation method of mushroom residue biochar is as follows: put the pre-ground mushroom residue into a tubular muffle furnace, heat up to 350°C at a rate of 10°C / min in a nitrogen atmosphere, then crack for 3 hours, and then cool down to Take it out at 40°C, grind and sieve to obtain biochar of mushroom residue;

[0050] The base fertilizer consists of ammonium nitrate (35% N content) and diammonium phosphate (18% N content, P 2 o 5 content is 35%), potassium chloride (K 2 O content is 50%) and boric acid (B content is 15%) mixed and granulated.

[0051] The preparation...

Embodiment 2

[0058] Modified polymer slow-release nitro compound fertilizer, including raw materials of the following quality: 10kg of grafted polyacrylamide, 15kg of biochar from mushroom residue, 2kg of polymethylene polyphenyl polyisocyanate and 73kg of base fertilizer;

[0059] Among them, the grafted polyacrylamide is prepared from polyacrylamide, formaldehyde and N,N'methylenebisacrylamide with a mass ratio of 5:0.03:0.05;

[0060] The preparation method of mushroom residue biochar is as follows: put the pre-ground mushroom residue into a tubular muffle furnace, heat up to 400°C at a heating rate of 10°C / min in a nitrogen atmosphere, then crack for 4 hours, and then cool down to 50°C, take it out, grind and sieve to get biochar of mushroom residue;

[0061] The base fertilizer consists of ammonium nitrate (N content is 35%), diammonium phosphate (N content is 18%, P 2 o 5 The content is 46%), potassium chloride (K 2 O content is 60%) and boric acid (B content is 17%) mixed and gra...

Embodiment 3

[0069] Modified macromolecule slow-release nitro compound fertilizer, including the following raw materials: grafted polyacrylamide 5kg, mushroom residue biochar 10kg, polymethylene polyphenyl polyisocyanate 5kg and base fertilizer 80kg;

[0070] Among them, the grafted polyacrylamide is prepared from polyacrylamide, formaldehyde and N,N'methylenebisacrylamide with a mass ratio of 7:0.05:0.05;

[0071] The preparation method of shiitake mushroom residue biochar is as follows: put the pre-ground shiitake mushroom residue into a tubular muffle furnace, heat up to 450°C at a heating rate of 12°C / min in a nitrogen atmosphere, crack for 4 hours, and then cool down to 50°C, take it out, grind and sieve to get biochar of mushroom residue;

[0072] The base fertilizer consists of ammonium nitrate (N content is 40%), diammonium phosphate (N content is 20%, P 2 o 5 content is 45%), potassium chloride (K 2 O content is 60%) and boric acid (B content is 17%) mixed and granulated.

[0...

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Abstract

The invention discloses a modified polymer slow-release nitro-compound fertilizer which is prepared from the following raw materials in percentage by mass: 5 percent to 10 percent of grafted polyacrylamide, 10 percent to 15 percent of shiitake mushroom dreg biochar, 2 percent to 5 percent of polymethylene polyphenyl polyisocyanate and 73 percent to 83 percent of base fertilizer. The preparation method comprises the following steps: (1) weighing the raw materials; (2) preparing grafted polyacrylamide; (3) adding the grafted polyacrylamide and the shiitake mushroom dreg biochar into water, uniformly stirring, sealing, heating and drying; (4) adding polymethylene polyphenyl polyisocyanate, heating, and uniformly stirring to obtain a coating solution; and (5) heating the coating liquid, spraying the coating liquid onto the surface of the base fertilizer, drying, and cooling to obtain the product. The compound fertilizer greatly improves the nutrient utilization rate of crops, improves rhizosphere microbial communities, improves the disease resistance of the crops, enables nutrients required by the crops in the growth period to be absorbed more comprehensively, does not cause any pollution, and is green and safe.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, and more specifically relates to a modified polymer slow-release nitro compound fertilizer and a preparation method thereof. Background technique [0002] At present, the increase in world grain production mainly relies on the application of chemical fertilizers. Chemical fertilizers are the "food" of grains and play a decisive role in promoting the further development of agricultural production. After using chemical fertilizers, the yield per unit area of ​​crops increases by 56%-58%, and the total grain output increases by 31%-32%. Therefore, chemical fertilizers are the most critical means of production in agriculture, and have made important contributions to improving farmland soil fertility and ensuring national food security. [0003] In agricultural production practice, the most common problem in nitrogen fertilizer application is low utilization rate. According to statisti...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/40C05G3/80C05G5/30
CPCC05G3/00C05G3/40C05G3/80C05G5/30C05B7/00C05C1/00C05D1/02C05D9/00C05D9/02
Inventor 张君燕志强董鹏姬明飞陈吉宝
Owner NANYANG NORMAL UNIV
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