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A kind of organic-inorganic compound fertilizer of long-acting slow-release P and preparation method thereof

A compound fertilizer and slow-release technology, which is applied to inorganic fertilizers, organic fertilizers, and fertilizers made from biological wastes, can solve problems such as nutritional imbalances in compound fertilizers, improve quality, increase crop yields, and avoid threats Effect

Active Publication Date: 2019-03-05
GUIZHOU RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot make the nitrogen, phosphorus, and potassium elements in agricultural fertilizers achieve long-term effects, resulting in nutritional imbalances in compound fertilizers, making the fertilization effect a serious test for the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment Embodiment 1

[0034] Get 10g of polyglutamic acid, 100g of ammonium polyphosphate, 10kg of compound fertilizer sold by "Sa Kefu" of Qinhuangdao Zhong'a Chemical Fertilizer Company, the nutrient composition in this compound fertilizer is N-P2O5-K2O is 15-15-15; and The above-mentioned raw materials taken out are prepared according to the following method for the organic-inorganic compound fertilizer of long-acting slow-release P, which specifically includes the following steps:

[0035] (1) ammonium polyphosphate is placed in melting furnace, and it is processed to molten state, stand-by;

[0036] (2) Heating the γ-polyglutamic acid to a temperature of 210° C., and keeping it at a constant temperature for 1 minute, then adding the molten ammonium polyphosphate in step (1), and stirring for 10 minutes to obtain a mixture;

[0037] (3) melting the fertilizer, and taking 1 / 2 of the molten fertilizer for granulation, cooling, and passing through a 30-mesh sieve to obtain the sieve bottom materia...

experiment Embodiment 2

[0042] Get 15g of polyglutamic acid, 150g of ammonium polyphosphate, 30kg of bio-organic fertilizers sold under the brand of "Fusid"; and prepare the organic-inorganic compound fertilizer of long-acting slow-release P from the above-mentioned raw materials according to the following method, specifically Include the following steps:

[0043] (1) ammonium polyphosphate is placed in melting furnace, and it is processed to molten state, stand-by;

[0044] (2) Heating the γ-polyglutamic acid to a temperature of 225° C., and keeping it at a constant temperature for 3 minutes, then adding the molten ammonium polyphosphate in step (1), and stirring for 20 minutes to obtain a mixture;

[0045] (3) melting the fertilizer, and taking 1 / 2 of the molten fertilizer for granulation, cooling, and passing through a 30-mesh sieve to obtain the sieve bottom material; then passing the sieve bottom material through a 60-mesh sieve to obtain the sieve surface;

[0046] (4) The mixture obtained in ...

experiment Embodiment 3

[0050] The organic-inorganic compound fertilizer of long-acting slow-release P, its raw material components by weight are 3kg of γ-polyglutamic acid, 13kg of ammonium polyphosphate, 2000kg of fertilizer, 500kg of organic matter, and 500kg of inorganic matter. The organic matter is arbitrarily mixed with corncobs, straw powder, livestock and poultry manure, and traditional Chinese medicine dregs. The inorganic matter is any mixture of plant ash and bentonite. The fertilizer is any mixture of phosphorus fertilizer, potassium fertilizer, medium element fertilizer, trace element fertilizer, nitrogen, phosphorus and potassium compound fertilizer, and bio-organic fertilizer. The phosphate fertilizer is any mixture of potassium dihydrogen phosphate, ammonium phosphate, calcium hydrogen phosphate, calcium metaphosphate, steel slag phosphate fertilizer or active phosphate rock powder. The potassium fertilizer is selected from any mixture of potassium chloride, potassium sulfate, potas...

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Abstract

The invention relates to the field of compound fertilizers and relates to a long-acting organic-inorganic compound fertilizer slowly releasing P and a preparation method thereof. Organic-inorganic compound fertilizer materials are prepared into the compound fertilizer with a multilayer structure by designing raw material proportioning and limiting processing technology steps and technology parameters, fertilizer nutrients are released with decomposition and release of each layer of the structure, and nitrogen and phosphorus elements are simultaneously obtained and released in a long-acting mode by adopting gamma-polyglutamic acid and ammonium polyphosphate proportioning design. The phosphorus element can be also provided for crops while the nitrogen element can be provided for the crops, balanced nutrient absorption of crops is promoted, and soil pollution is reduced. The metal ions or ammonium ions and the like left in soil are chelated and the ammonium ions in ammonium polyphosphate can be exchanged with the metal ions left in the soil by adopting gamma-polyglutamic acid, so that the soil is remarkably improved, soil quality is improved, the using amount of the fertilizer is decreased, the utilization rate of the fertilizer is improved, and the production cost of the crops is reduced.

Description

technical field [0001] The invention relates to the technical field of organic-inorganic compound fertilizers, in particular to a long-acting slow-release organic-inorganic compound fertilizer and a preparation method thereof. Background technique [0002] With the continuous development of the agricultural industry, and the impact of the agricultural industry on the environment is getting worse, especially agricultural fertilization, agricultural pesticide application, etc. have brought a severe test to the coordinated development of the environment and the agricultural industry, making the agricultural use The quality requirements of fertilizers and agricultural chemicals are getting higher and higher. [0003] γ-polyglutamic acid is a water-soluble polyamino acid produced by microbial fermentation. It is a high molecular polymer in which glutamic acid units form peptide bonds through α-amino and γ-carboxyl groups. The molecular weight distribution is 100kDa-10000kDa. It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
CPCC05B13/06C05G3/00C05D1/00C05D9/00C05F3/00C05F5/00C05F11/00
Inventor 田娟王瑶陈思帆杨杰陈文兴周昌平虞江
Owner GUIZHOU RES INST OF CHEM IND
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