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Application of thiourea-formaldehyde resin in inhibition of urease in soil

A technology of thiourea-formaldehyde resin and urease inhibitor, which is applied in the application, fertilizer mixture, fertilization device and other directions, can solve the problems of obvious toxic and side effects, short action time, poor stability, etc. Effect

Pending Publication Date: 2019-12-20
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing urease inhibitors have certain limitations in practical application because most of them have problems such as poor stability, short action time, and obvious toxic and side effects. ), however NBPT is a viscous, waxy, heat and water sensitive material that is extremely difficult to handle

Method used

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  • Application of thiourea-formaldehyde resin in inhibition of urease in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The application of thiourea-formaldehyde resin in the preparation of urease inhibitor consists of the following steps:

[0017] (1) Weigh one kilogram of air-dried soil in a flower pot and keep the soil moisture content at 60%. The pH of the soil was adjusted to be neutral, and after the water soaked evenly, it was placed in a greenhouse at 25°C for constant temperature cultivation for 30 days to restore its biological activity. During the pre-cultivation period, aerate and replenish lost water every day.

[0018] (2) Weigh the quantitative pre-cultivation soil, add 10g of thiourea-formaldehyde resin, N-butyl thiophosphoric triamide (NBPT), phenylphosphoric diamide (PPD), and hydroquinone (HQ) to the soil respectively. Mix well, put them in a greenhouse with a temperature of 25°C for constant temperature cultivation, and take samples to measure urease activity on the 1st, 3rd, 5th, 7th, 14th and 28th days after cultivation. During the cultivation period, ventilate eve...

Embodiment 2

[0022] The application of thiourea-formaldehyde resin in the preparation of urease inhibitor consists of the following steps:

[0023] (1) Weigh one kilogram of air-dried soil in a flower pot and keep the soil moisture content at 60%. The pH of the soil was adjusted to be neutral, and after the water soaked evenly, it was placed in a greenhouse at 25°C for constant temperature cultivation for 30 days to restore its biological activity. During the pre-cultivation period, aerate and replenish lost water every day.

[0024] (2) Weigh the quantitative pre-cultivation soil, add 30g of thiourea-formaldehyde resin, N-butyl thiophosphoric triamide (NBPT), phenylphosphoric diamide (PPD), and hydroquinone (HQ) to the soil respectively. Mix well, put them in a greenhouse with a temperature of 25°C for constant temperature cultivation, and take samples to measure urease activity on the 1st, 3rd, 5th, 7th, 14th and 28th days after cultivation. During the cultivation period, ventilate eve...

Embodiment 3

[0028] The application of thiourea-formaldehyde resin in the preparation of urease inhibitor consists of the following steps:

[0029] (1) Weigh a certain amount of air-dried soil in a flower pot, and keep the soil moisture content at 60%. The pH of the soil was adjusted to be neutral, and after the water soaked evenly, it was placed in a greenhouse at 25°C for constant temperature cultivation for 30 days to restore its biological activity. During the pre-cultivation period, aerate and replenish lost water every day.

[0030] (2) Weigh the quantitative pre-cultivation soil, and add 1% thiourea-formaldehyde resin, N-butylthiophosphoric triamide (NBPT), phenylphosphoric diamide (PPD) and hydroquinone (HQ) to the Mix them in the soil, put them into the greenhouse with different temperature of 25 ℃ for constant temperature cultivation, and take samples to measure the urease activity on the 1st, 3rd, 5th, 7th, 14th and 28th day after cultivation. During the cultivation period, ve...

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Abstract

The invention relates to application of thiourea-formaldehyde resin in inhibition of urease in soil. Thiourea resin is added into soil as a novel urease inhibitor to inhibit the activity of urease inthe soil. The adding amount of the thiourea-formaldehyde resin is 10-50g per kilogram of soil. As a novel urease inhibitor, thiourea resin scrambles for ligands to reduce the urease activity, the inhibition mechanism is clear, and the urease activity can be effectively inhibited. The invention opens up a new application field of thiourea resin in inhibition of urease, and the inhibition activity is superior to that of the recognized urease inhibitor NBPT. The thiourea-formaldehyde resin has rich sources of synthesis raw materials, the price is low, also the adding amount of the thiourea-formaldehyde resin is small, and the effect is stable after the thiourea-formaldehyde resin is applied to soil. Along with the increase of the dosage, the inhibition effect is greatly improved. And the adding of the thiourea-formaldehyde resin does not change the pH value of the soil, and has little influence on the physicochemical properties of the soil.

Description

technical field [0001] The invention belongs to the technical field of urease inhibitors, in particular to the application of thiourea-formaldehyde resin in inhibiting urease in soil. Background technique [0002] Urease is an enzyme that widely exists in various organisms and ecological environments. Urease can catalyze the hydrolysis of urea into ammonia, so it plays an important role in the metabolism of ammonia. However, if the activity of urease is too high, the catalytic hydrolysis of urea will be too fast, and a large amount of ammonia gas will be released, which will bring various hazards to agriculture, animal husbandry, the environment and even human health. In agriculture, urease catalyzes the hydrolysis of urea into ammonia too quickly, which will lead to the volatilization of ammonia and the excessive accumulation of nitrate ions and ammonium ions in the soil, thereby reducing the utilization rate of ammonia and polluting the atmosphere, water, soil and other e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
Inventor 姚珊珊刘涉江张广庆夏云飞
Owner TIANJIN UNIV
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