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Application of polymalic acid or/and salt to preparation of fertilizer, product prepared from polymalic acid or/and salt and preparation method

A polymalic acid and malate technology, applied in the agricultural field, can solve the problems of secondary soil pollution, polluted soil environment, poor degradability of organic polymer materials, etc., and achieve the advantages of increasing economic benefits, reducing input costs and improving utilization rate Effect

Active Publication Date: 2014-03-26
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the continuous increase in the amount of chemical fertilizers, their utilization rate and utilization efficiency have gradually declined. Improving the utilization efficiency of fertilizers is an urgent need for increasing agricultural income. Among them, the development of slow and controlled release fertilizers is currently an effective way. However, the application of slow and controlled release fertilizers The wrapped polymer materials are difficult to degrade, pollute the soil environment and other problems
Slow and controlled release fertilizers are generally added by adding polymer materials, but organic polymer materials have poor degradability in soil and will cause secondary pollution to the soil
Polymalic acid is a new type of biodegradable polymer produced by microbial fermentation. It has the characteristics of high safety and complete degradability. A report on the use of acid in the preparation of fertilizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The polymalic acid fertilizer consists of 5kg of polymalic acid solution with a pH value of 3 and a weight percentage of 0.5% and 45kg of compound fertilizer (the weight ratio of nitrogen, phosphorus pentoxide, and potassium oxide is 15:15:15).

[0022] The preparation method of polymalic acid fertilizer is to spray the polymalic acid solution on the surface of the compound fertilizer (N-P-K=15:15:15) particles for coating under the condition of 80°C, and the spraying amount is based on the polymalic acid aqueous solution and the compound fertilizer. The weight ratio of fertilizer is 1:9 to get polymalic acid fertilizer.

[0023] The weight percentage of polymalic acid in the polymalic acid fertilizer prepared in this example is 0.05%. During the preparation process, the polymalic acid solution is sprayed on the surface of the compound fertilizer at 80°C to form a film between the polymalic acid solution and the compound fertilizer. , so as to prolong the fertilizer rel...

Embodiment 2

[0027] Polymalic acid fertilizer consists of 10kg of polymalic acid solution with a pH of 6 and a weight percentage of 50% and 40kg of compound fertilizer (the weight ratio of nitrogen, phosphorus pentoxide, and potassium oxide is 15:15:15).

[0028] The preparation method of polymalic acid fertilizer is to spray the polymalic acid solution on the surface of the compound fertilizer (N-P-K=15:15:15) particles for coating under the condition of 50 ℃, and the spraying amount is based on the polymalic acid aqueous solution and the compound fertilizer. The weight ratio of fertilizer is 1:9 to get polymalic acid fertilizer.

[0029] The weight percentage of polymalic acid in the polymalic acid fertilizer prepared in this example is 10%. During the preparation process, the polymalic acid solution is sprayed on the surface of the compound fertilizer at 80°C, so that the polymalic acid solution can be complexed with the compound fertilizer. Forming a film, thereby prolonging the fertil...

Embodiment 3

[0033] Polymalic acid fertilizer consists of 5kg of polymalic acid solution with a pH of 6 and a weight percentage of 20% and 45kg of compound fertilizer (the weight ratio of nitrogen, phosphorus pentoxide, and potassium oxide is 15:15:15).

[0034] The preparation method of polymalic acid fertilizer is to spray the polymalic acid solution on the surface of the compound fertilizer (N-P-K=15:15:15) particles for coating under the condition of 100°C, and the spraying amount is based on the polymalic acid aqueous solution and the compound fertilizer. The weight ratio of fertilizer is 1:9 to get polymalic acid fertilizer.

[0035] The weight percentage of polymalic acid in the polymalic acid fertilizer prepared in this example is 2%. During the preparation process, the polymalic acid solution is sprayed on the surface of the compound fertilizer at 80°C, so that the polymalic acid solution can be complexed with the compound fertilizer. Forming a film, thereby prolonging the fertili...

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Abstract

The invention discloses application of polymalic acid or / and salt to preparation of fertilizer, a product prepared from polymalic acid or / and salt and a preparation method. Application ranges of the polymalic acid and salt are broadened by using the polymalic acid and salt to prepare fertilizer, and polymalic acid and salt can be absorbed by crops, cause no secondary contamination to soil, have higher affinity for numerous nutrient elements in fertilizer, can accelerate the formation of root systems of crops, reduce the application quantity of fertilizer, improve the utilization rate of fertilizer and the yield and property of crops, and have a broad application prospect.

Description

technical field [0001] The invention belongs to the field of agriculture, and in particular relates to the application of polymalic acid or / and salt in preparing fertilizers, and also relates to the fertilizer prepared from polymalic acid or / and salt and the preparation method of the fertilizer. Background technique [0002] In recent years, with the continuous increase in the amount of chemical fertilizers, their utilization rate and utilization efficiency have gradually declined. Improving the utilization efficiency of fertilizers is an urgent need for increasing agricultural income. Among them, the development of slow and controlled release fertilizers is an effective way at present. However, the application of slow and controlled release fertilizers The wrapped polymer materials have problems such as refractory degradation and pollution of the soil environment. Slow and controlled-release fertilizers are generally added by adding polymer materials, but organic polymer ma...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 邹祥涂光伟陈力
Owner SOUTHWEST UNIVERSITY
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