N2O emission reduction method of northern dryland farmland soil

A technology for farmland and soil, applied in fertilization methods, agriculture, fertilizer mixtures, etc., can solve problems such as increased emissions, achieve the effects of reducing fertilizer application, improving nitrogen use efficiency, and reducing N2O emissions from farmland

Active Publication Date: 2014-01-08
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the demand of China's population growth for food production, a large amount of nitrogen fertilizers are applied to farmland, resulting in farmland N 2 O emissions increase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The experiment in this example was carried out on black soil, and the planting crop was corn. The experiment was divided into treatment group and control group. In the treatment group, the application rate of organic fertilizer was 18 m 3 / ha, apply evenly to the furrows and ridge sides of the farmland at one time in late autumn. The application rate of nitrogen fertilizer in the following year was 70Kg N / ha for base fertilizer, 40Kg N / ha for top dressing at the end of June, and 110Kg N / ha for top dressing at the end of July (the total amount of nitrogen applied was 220Kg N / ha). In the control group, no organic fertilizer was applied, and the application amount of urea was 90Kg N / ha as base fertilizer, 50KgN / ha topdressing at the end of June, and 140KgN / ha at the end of July (the total amount of fertilizer nitrogen applied was 280KgN / ha).

[0021] The dimensions of the static box for gas sample collection are 580 x 280 x 200 mm. Four randomly distributed field test p...

Embodiment 2

[0023] The experiment in this example was carried out on black soil, and the planting crop was corn. The experiment was divided into treatment group and control group. In the treatment group, the application rate of organic fertilizer was 15 m 3 / ha, apply evenly to the furrows and ridge sides of the farmland at one time in late autumn. The application rate of nitrogen fertilizer (urea) in the following year was 72Kg N / ha for base fertilizer, 45Kg N / ha for topdressing at the end of June, and 113KgN / ha for topdressing at the end of July (the total amount of fertilizer nitrogen applied was 230KgN / ha). In the control group, no organic fertilizer was applied, and the application rates of nitrogen fertilizer were 87Kg N / ha as base fertilizer, 54Kg N / ha topdressing at the end of June, and 135KgN / ha at the end of July (the total amount of chemical fertilizer nitrogen applied was 276KgN / ha).

[0024] The dimensions of the static box for gas sample collection are 580 x 280 x 200 mm. ...

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PUM

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Abstract

The invention belongs to the technical field of emission reduction of greenhouse gases in farmland ecological systems, and in particular relates to an N2O emission reduction method of northern dryland farmland soil. The N2O emission reduction method disclosed by the invention comprises the following steps of: applying 2-18 m<3> / ha of organic fertilizer on dryland farmland soil to be processed in late autumn season; and reducing 10-50% of applying amount of nitrogen manure in the seasons of seeding and growing crops in the next year, so that the N2O emission of soil is obviously reduced. According to the invention, due to the manner of additionally applying organic fertilizer in autumn and reducing the applying amount of nitrogen manure, the purposes of increasing crop yield or not reducing yield and reducing N2O emission of the northern dryland farmland soil simultaneously are achieved.

Description

technical field [0001] The invention belongs to the technical field of greenhouse gas emission reduction in farmland ecosystems, in particular to a N 2 O Abatement method. Background technique [0002] N 2 O is second only to CO 2 and CH 4 of important greenhouse gases whose single-molecule warming potential is CO 2 It also participates in the destruction of stratospheric ozone and increases the intensity of surface ultraviolet radiation, which in turn leads to a rapid increase in the incidence of human skin cancer and other diseases. Atmospheric N 2 The concentration of O is about 319 ppbv and is increasing at a rate of 0.25% per year. This means N 2 O will have a profound impact on human living environment and human health. [0003] The application of nitrogen fertilizer to farmland is the cause of N 2 One of the important factors of O emission. In order to meet the demand for food production due to population growth in China, a large amount of nitrogen fertilize...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): A01C21/00C05G1/00
Inventor郭彦玲徐慧夏宗伟董丹孔双韩斯琴
OwnerSHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI