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Poly-gama-glutamic acid building fertilizer

A glutamic acid and fertilizer technology, applied in the form of fertilizer, fertilizer mixture, fertilization device, etc., can solve the problems of inconvenient application process, loose fertilizer combination, and reduce the use efficiency of poly-γ-glutamic acid, so as to achieve fertilizer utilization rate Improve, save fertilizer, improve activity and the effect of plant root vitality

Inactive Publication Date: 2008-02-06
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, applying poly-γ-glutamic acid alone is not only inconvenient in the application process, but also reduces the efficacy of poly-γ-glutamic acid due to its loose combination with fertilizers.

Method used

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  • Poly-gama-glutamic acid building fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The synergistic urea in the molten state is added at a constant rate (2.5kg / hour, 3.75kg / hour and 4.25kg / hour) by a metering pump in the urea pilot plant with an annual output of 12,000 tons before granulation The poly-γ-glutamic acid fermentation broth with a weight concentration of 1% is mixed with molten urea to make synergistic urea with a diameter of 2.0 to 3.0 mm in a prilling tower. The specifications of the obtained urea are shown in the table below;

Embodiment 2

[0042] The production of coated synergistic urea is to use a spray device to spray the aqueous solution containing poly-γ-glutamic acid with a weight concentration percentage of 1% and a pH of 3.5 on the surface of urea particles under the condition of 80°C. Poly-γ-glutamic acid or its salt solution is transported into the nozzle through a peristaltic pump, and sprayed on the surface of the finished urea granules to make it fully coated. According to the concentration and volume of the sprayed poly-γ-glutamic acid or its salt, Coated urea can be produced with different concentrations of poly-gamma-glutamic acid or its salts. The content of poly-γ-glutamic acid is 0.025%, 0.05%, 0.075% and 0.1% coated urea by weight, and the urea concentration released into the environment is measured by an ultraviolet spectrophotometer, and the stripping rate of urea is calculated to make its slow release curve (Figure 1, Figure 2). The release time of the coated urea with a poly-γ-glutamic a...

Embodiment 3

[0044] Coated synergistic compound fertilizer is to use a spray device to spray the sodium salt solution of poly-γ-glutamic acid with a weight concentration of 2% and a pH of 3.0 on the surface of the compound fertilizer particles under the condition of 80°C. The compound fertilizer comprises potassium sulfate compound fertilizer, N-P-K content weight ratio is the inorganic compound fertilizer of 15: 15: 15, and N-P-K content 15: 15: 15, the high concentration organic-inorganic compound fertilizer of organic matter content 20% and N-P-K content 9: 7:9, low-concentration organic-inorganic compound fertilizer with an organic matter content of 15%. Poly-γ-glutamic acid or its salt solution is transported into the nozzle through a peristaltic pump, sprayed on the surface of the compound fertilizer particles to make it fully coated, according to the concentration and volume of the sprayed poly-γ-glutamic acid or its salt solution Different, coated compound fertilizers containing di...

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Abstract

The invention relates to a poly-gamma-glutamic acid synergistic fertilizer for strengthening fertilizer effect, which belongs to the fertilizer field. The invention comprises graininess fertilizer which comprises the poly-gamma-glutamic acid. The contents of the poly-gamma-glutamic acid and fertilizer in weight are as follows: 0.01 to 1 percent of the poly-gamma-glutamic acid and the remained content is fertilizer. The contents of poly-gamma-glutamic acid of the invention are strictly controlled and the poly-gamma-glutamic acid can be conveniently fertilized. The poly-gamma-glutamic acid is combined with to make full use of the feature as absorption promoter of fertilizer of the poly-gamma-glutamic acid, therefore, crops output is further raised. The fertilizer is released slowly and prolonged by around 4 times compared with the traditional fertilizer in soil. The invention promotes crop absorption and inhibits fertilizer ingredient decomposition and loss, therefore, fertilizer use is directly decreased by more than 20 percent. The pollution to environment is reduced without excessive or inappropriate fertilization.

Description

technical field [0001] The invention relates to a poly-γ-glutamic acid synergistic fertilizer capable of enhancing fertilizer efficiency, which belongs to the field of agricultural chemical fertilizers. Background technique [0002] At present, in the current season utilization rate of chemical fertilizers in my country, nitrogen is about 30% to 35%, phosphorus is 10% to 25%, and potassium is 35% to 50%, which is far below the level of developed countries in the world. The main reason for the low fertilizer utilization rate is Leaching loss, especially in nitrogen and potassium fertilizers. People are trying to find ways to improve fertilizer use efficiency, one of which is to modify the fertilizer itself to develop new fertilizers suitable for crop growth needs. The development of slow / control release fertilizers (slow / control release fertilizer) is one of the effective measures commonly used in countries all over the world, such as: nitrogen fertilizers added with nitrific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 陈守文蔡皓舒芹柯云冀志霞钱风光
Owner HUAZHONG AGRI UNIV
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