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N2O emission reduction method of northern dryland farmland soil

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

Active Publication Date: 2012-10-31
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
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  • 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 conducted on black soil, and the planting crop was corn. The experiment is divided into treatment group and control group. In the treatment group, the application amount of organic fertilizer is 18m 3 / ha, evenly applied to the ridge and side of the farmland at one time in late autumn. The amount of nitrogen fertilizer applied in the following year was 70Kg N / ha for base fertilizer, 40Kg N / ha for topdressing at the end of June, and 110Kg N / ha for topdressing at the end of July (the total amount of fertilizer nitrogen was 220Kg N / ha). The control group did not apply organic fertilizer, and the application rate of urea was 90Kg N / ha for base fertilizer, 50KgN / ha for top-dressing at the end of June, and 140Kg N / ha for top-dressing at the end of July (the total amount of fertilizer nitrogen was 280Kg N / ha).

[0021] The size of the static box for gas sample collection is 580×280×200mm. Combining different ratios of organic fertilizer and / or...

Embodiment 2

[0023] The experiment in this example was conducted on black soil, and the planting crop was corn. The experiment is divided into treatment group and control group. In the treatment group, the application amount of organic fertilizer is 15m 3 / ha, evenly applied to the ridge and side of the farmland at one time in late autumn. The amount of nitrogen fertilizer (urea) applied in the following year was 72Kg N / ha for base fertilizer, 45Kg N / ha for top-dressing at the end of June, and 113Kg N / ha for top-dressing at the end of July (the total amount of fertilizer nitrogen applied was 230KgN / ha). No organic fertilizer was applied to the control group. The amount of nitrogen fertilizer applied was 87Kg N / ha for base fertilizer, 54Kg N / ha for topdressing at the end of June, and 135Kg N / ha for topdressing at the end of July (the total amount of nitrogen fertilizer applied was 276KgN / ha).

[0024] The size of the static box for gas sample collection is 580×280×200mm. Combining different ...

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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, and is specifically a kind of N 2 O reduction methods. Background technique [0002] N 2 O is second only to CO 2 And CH 4 Of the important greenhouse gas, its single-molecule warming potential is CO 2 296 times (a hundred-year time scale), and also participate in the destruction of stratospheric ozone and increase the intensity of surface ultraviolet radiation, which led to a rapid increase in the incidence of human skin cancer and other diseases. N in the current atmosphere 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 the human living environment and human health. [0003] Applying nitrogen fertilizer to the farmland will cause the farmland N 2 One of the important factors of O emissions. In order to meet the needs of China’s population growth for food product...

Claims

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Application Information

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