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A method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland

A technology of ammonia volatilization and nitrogen fertilizer, applied in the fertilization method, nitrogen fertilizer, application and other directions, can solve the problems of increasing the cost of fertilization, increase the workload, etc., and achieve the effect of reducing the loss of nitrification and denitrification, reducing air pollution, and improving the efficiency of nitrogen fertilizer utilization.

Active Publication Date: 2022-08-02
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also needs to granulate the nitrogen fertilizer before fertilization to facilitate the application, and the manual application will greatly increase the workload, while the mechanical application requires special fertilization machinery, which will increase the cost of fertilization

Method used

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  • A method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland
  • A method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland
  • A method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland

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Embodiment 1

[0021] A method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland, comprising the following steps:

[0022] Step 1. Determine the appropriate ratio of urease inhibitor and nitrogen fertilizer: select N-butyl thiophosphoric triamide (NBPT) as the urease inhibitor, select urea as the nitrogen fertilizer, and set the ratio of urease inhibitor and urea (calculated by pure nitrogen). The mass ratio is set to five gradients of 0, 0.5%, 1.0%, 1.5% and 2.0%. Take about 150kg of local typical farmland soil (calculated as dry soil), pass through a 2mm sieve, and mix thoroughly. Add 10kg of farmland soil to the plastic buckets, a total of 15 buckets. For paddy field soil, it needs to be flooded 5cm, and for dryland soil, it needs to keep the field water holding capacity at 60% and maintain it for one week. 15 parts of urea with a nitrogen content of 1 g were weighed, and the NBPT solution was evenly sprayed on the surface of the urea in the propor...

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Abstract

The present application discloses a method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland, comprising the following steps: step 1, determining the ratio of urease inhibitor and nitrogen fertilizer; step 2, determining the reduction ratio of nitrogen fertilizer and the application time of nitrogen fertilizer topdressing; step 3 , Combine nitrogen fertilizer and urease inhibitor mixed nitrogen fertilizer for farmland application. The technical effect of the present application is that the amount of nitrogen fertilizer in medium and high yield fields can be reduced by more than 20%. By spraying the urease inhibitor on the surface of urea, the present patent can effectively reduce the ammonia volatilization of nitrogen fertilizer and subsequent nitrification and denitrification loss, and improve the utilization efficiency of nitrogen fertilizer, thereby realizing the reduction of nitrogen fertilizer.

Description

technical field [0001] The invention belongs to the technical field of crop fertilization, in particular to a method for reducing the amount of nitrogen fertilizer and ammonia volatilization loss in farmland. Background technique [0002] At present, most of the nitrogen fertilizers used in farmland in my country are urea, which is easily decomposed into ammonium nitrogen in farmland, which can be lost through ammonia volatilization and nitrification and denitrification. In order to ensure crop yield, nitrogen fertilizers are often applied excessively in agricultural production, and nitrogen that cannot be absorbed by crops will be lost to the environment through ammonia volatilization, resulting in a series of negative environmental effects such as atmospheric aerosol pollution and increased atmospheric nitrogen deposition. Reducing the amount of nitrogen fertilizer and improving the utilization rate of nitrogen fertilizer will reduce the loss of ammonia volatilization in p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00C05G3/90C05G5/30C05C9/00
CPCA01C21/005C05C9/00C05G3/90C05G5/30C05C9/005Y02P60/21
Inventor 沈健林朱潇王娟李勇吴金水
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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