Nitrogen fertilizer synergist and nitrogen fertilizer containing same

A technology of nitrogen fertilizer synergist and nitrogen fertilizer, applied in liquid fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems of limited application and low hydrolytic stability

Active Publication Date: 2015-05-20
AVIC FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditionally used nitrification inhibitors have high volatility
The volatility of nitrification inhibitors can be effectively suppressed by combining nitrification inhibitors with other substances, but the hydrolytic stability in soil is not high after being applied with fertilizers, which limits its further application

Method used

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  • Nitrogen fertilizer synergist and nitrogen fertilizer containing same
  • Nitrogen fertilizer synergist and nitrogen fertilizer containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a round bottom flask equipped with a magnetic stirrer and a reflux condenser, add 42.1 g of sodium alginate (0.1 mol), 2.3 g of 2-chloro-6-trichloromethylpyridine (CP, 0.01 mol), and 20 mL of water. The reaction mixture was slowly heated to 50 °C until all undissolved fractions formed a homogeneous solution. Then cooling to obtain 2-chloro-6-trichloromethylpyridine modified alginate, which can be directly added to nitrogen fertilizer as nitrification inhibitor use.

Embodiment 2

[0028] In a round-bottomed flask equipped with a magnetic stirrer and a reflux condenser, add 100 g of fulvic acid (about 0.1 mol), 0.97 g of 3,5-dimethylpyrazole (0.01 mol), and 200 mL of anhydrous tetrahydrofuran under vigorous stirring. React with 20.6g of dicyclohexylcarbodiimide (DCC, 0.1mol) at 10°C for 2h, then filter to remove unreacted DCC, then evaporate the filtrate to dryness to obtain a modified solid nitrogen fertilizer synergist.

[0029] Dissolve 10g of the above-mentioned solid nitrogen fertilizer synergist in 50mL of water, heat the mixture to 80°C and add sodium hydroxide with a mass concentration of 40% at this temperature until the pH value is between 7-8, forming a clear Modified nitrogen fertilizer synergist aqueous solution. The aqueous solution of the modified nitrogen fertilizer synergist can be added to liquid nitrogen fertilizer or directly applied to soil to exert its effect.

Embodiment 3

[0031] In a round bottom flask equipped with a magnetic stirrer and a reflux condenser, add 200 g of humic acid, 9.7 g of 3,5-dimethylpyrazole (0.1 mol), 200 mL of anhydrous tetrahydrofuran and 20.6 g of dicyclohexyl Carbodiimide (DCC, 0.1mol) was reacted at 10°C for 2h, then filtered to remove unreacted DCC, and the filtrate was evaporated to dryness to obtain a modified solid nitrogen fertilizer synergist.

[0032] Dissolve 10g of the above-mentioned solid nitrogen fertilizer synergist in 50mL of water, heat the mixture to 80°C and add sodium hydroxide with a mass concentration of 40% at this temperature until the pH value is between 7-8, forming a clear Modified nitrogen fertilizer synergist aqueous solution. The aqueous solution of the modified nitrogen fertilizer synergist can be added to liquid nitrogen fertilizer or directly applied to soil to exert its effect.

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Abstract

The invention relates to a nitrogen fertilizer synergist which comprises 0.1-50 wt% of nitrogen fertilizer inhibitor and 50-99.9 wt% of polymer or polymer salt, wherein the nitrogen fertilizer inhibitor is combined with the polymer or polymer salt through covalent bond or ionic bond. By compounding the nitrogen fertilizer inhibitor with the polymer or polymer salt, the nitrogen fertilizer synergist can effectively avoid the problems of volatilization and hydrolysis after the nitrogen fertilizer inhibitor is directly added into the nitrogen fertilizer, obviously lowers the degradation efficiency of the nitrogen fertilizer inhibitor in soil after the nitrogen fertilizer is applied, prolongs the half life in soil, and obviously displays the effect on inhibiting the nitration of the nitrogen fertilizer, thereby enhancing the environment tolerance of the nitrogen fertilizer. Besides, the invention also relates to a nitrogen fertilizer containing the nitrogen fertilizer synergist.

Description

technical field [0001] The invention relates to the field of agricultural chemicals, in particular to a nitrogen fertilizer synergist and nitrogen fertilizer containing the nitrogen fertilizer synergist. Background technique [0002] For fertilizing plants, ammonia compounds are usually used as fertilizers. However, ammonia compounds are converted into nitrate by microorganisms in the soil within a relatively short period of time, that is, soil nitrification, and the resulting nitrate is washed away from the soil relatively quickly. Rapid nitrification is the largest cause of fertilizer loss as the washed away portion can no longer be used for plant nutrition. In order to better utilize the nitrogen contained in fertilizers, studies have found that adding nitrification inhibitors to fertilizers can effectively inhibit nitrification. However, traditionally used nitrification inhibitors have high volatility. The volatility of nitrification inhibitors can be effectively supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
CPCC05G3/90C05G5/23Y02P60/21
Inventor 郭长青张肖飞李清霞廖照源秦爱国
Owner AVIC FERTILIZER
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