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Preparation method of polyglutamic acid biochar-based organic fertilizer

A technology of polyglutamic acid and biochar, applied in the direction of organic fertilizers, fertilizers made of biological waste, fertilization equipment, etc., can solve the problems of unclear contributions, achieve the effect of rich pores, simple production methods, and less sewage

Active Publication Date: 2020-09-08
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contribution of biochar alone to crop yields is not well understood

Method used

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  • Preparation method of polyglutamic acid biochar-based organic fertilizer
  • Preparation method of polyglutamic acid biochar-based organic fertilizer
  • Preparation method of polyglutamic acid biochar-based organic fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of polyglutamic acid biochar-based organic fertilizer, comprising the steps of:

[0028] (1) Preparation of biochar from Lycium barbarum branches

[0029] After testing, the main components and contents of Lycium barbarum branches are 31.49% lignin, 28.97% cellulose, 17.05% hemicellulose, and 9.51% ash content, which is a good biomass material for preparing biochar. As a material for the preparation of biochar.

[0030] Adopt natural air-drying to make the water content of the wolfberry branches lower than 10% (mass fraction by weight), and trim them into particles with a length of about 1 centimeter (cm) after crushing.

[0031] Lycium barbarum branch biochar was prepared by high-temperature calcination, and the anoxic condition in the reaction system was maintained by feeding inert gas (nitrogen).

[0032] The parameters such as temperature, heating rate, and time for preparing biochar from Lycium barbarum branches were optimized, and the techno...

Embodiment 2

[0045] In the pot experiment, each pot was filled with 10kg of soil, and 6 corn seeds were sown in each pot. When the corn had 4 true leaves, 4 plants were planted and harvested after 30 days. During the experiment, each treatment group was artificially set to a low irrigation level, and a total of seven treatments were set up in the experiment, namely

[0046] TR1:CF(fertilizer);

[0047] TR2: 0.5% PGA (organic fertilizer containing γ-PGA through solid fermentation of C1 strain);

[0048] TR3: 0.5% BC-PGA (mixed polyglutamic acid biochar-based organic fertilizer);

[0049] TR4: 1.0% PGA;

[0050] TR5: 1.0% BC-PGA;

[0051] TR6: 1.5% PGA;

[0052] TR7: 1.5% BC-PGA;

[0053] Repeat 5 times. Each treatment was supplemented with urea, superphosphate and potassium chloride to the same N, P and K levels, organic fertilizer was applied as base fertilizer once, and chemical fertilizer was applied twice.

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Abstract

The invention discloses a preparation method of a polyglutamic acid biochar-based organic fertilizer. According to the method, Chinese wolfberry branches are selected as main raw materials to preparecharcoal, agricultural solid organic waste is directly used as a raw material to produce an organic fertilizer containing polyglutamic acid through solid fermentation, and the organic fertilizer containing polyglutamic acid is compounded with charcoal to obtain the charcoal-based organic fertilizer containing polyglutamic acid, so that resource utilization of agricultural waste is achieved while environmental pollution of agricultural waste is solved, and both environmental and economic benefits are achieved. The compound organic fertilizer prepared by the method can promote nutrient absorption of crops, improve physical and chemical properties of soil and increase the utilization rate of the fertilizer.

Description

technical field [0001] The invention belongs to the technical field of functional fertilizer production, and in particular relates to a preparation method of a polyglutamic acid biochar-based organic fertilizer that can promote crop nutrient absorption and improve fertilizer utilization. Background technique [0002] Low fertilizer utilization rate is a major bottleneck restricting the development of my country's agriculture. According to the data, in 2011, the amount of nitrogen fertilizer applied in my country was 24 million tons, and the loss due to over-volatility, leaching and runoff was huge, and the direct loss of fertilizer was about 10 million tons, equivalent to about 34 billion yuan. At the same time, it will bring about the decline of soil fertility, the reduction of crop quality, and serious environmental pollution. Therefore, increasing the utilization rate of fertilizers and reducing the loss of fertilizers has received extensive attention from agricultural w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80
CPCC05D9/00C05G3/80C05F3/00C05F5/002C05F5/006C05F11/00C05F11/08
Inventor 雍晓雨唐晨周俊安巍王亚军梁晓婕王孝
Owner NANJING TECH UNIV
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