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Method and device for determining diffusion and reduction processes of nitrous oxide in soil

A nitrous oxide, soil technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as weak research

Inactive Publication Date: 2014-04-30
INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

However, domestic and foreign soil N 2 Most O emission studies use the static box method to measure the soil surface, and the N produced in the soil 2 Diffusion and reduction process of O and N production from subsoil 2 Research on the contribution of O to surface emissions is very weak, mainly because a suitable method for the quantitative determination of N 2 Diffusion of O in soil and its reduction intensity during the diffusion process

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  • Method and device for determining diffusion and reduction processes of nitrous oxide in soil
  • Method and device for determining diffusion and reduction processes of nitrous oxide in soil
  • Method and device for determining diffusion and reduction processes of nitrous oxide in soil

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Embodiment Construction

[0043] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0044] A. Soil column sample filling: take the air-dried soil after mixing, measure the moisture content of the air-dried soil before filling the tank, and then calculate the required soil weight according to the bulk density of the field soil and the volume of the cultivation tank, and fill the soil layer by layer after weighing the soil. 5cm from the upper surface of the column sample filling to the upper edge of the culture tank (8);

[0045] B. Pre-cultivation: Adjust the soil moisture to 40% pore water content to activate the soil microbial activity. During this period, the inflatable bottle is not connected, but the gas is collected regularly at 14:00 every afternoon to measure the soil N 2 O emission flux; the pre-cultivation can be ended if there is no statistically significant difference in the measured values ​​of the two days before and after;...

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Abstract

The invention relates to a method and a device for determining diffusion and reduction processes of nitrous oxide in soil. The method comprises the following steps: A. loading soil column samples; B. pre-culturing; C. determining a sample, namely introducing N2O or N2 gas which is used in a control test into two filled soil column samples by an inflating system after a pre-culturing test, and completing the gas collection after the N2O emission flux is constant; carrying out air exploitation; monitoring the N2O emission flux of the soil surface layer, and quantifying the N2O diffusion and reduction quantity; and D. determining the N2O residual quantity. The method and the device for determining the diffusion and reduction processes of the nitrous oxide in the soil has the great significance to the deep study on the diffusion process and the reduction mechanism of the accumulation of the N2O in the soil at the lower layer and the quantification of the disposition of the N2O in a soil body as well as the quantitative relationship between the N2O and the environmental factor, can provide a basis for agriculture management measures in formulating and intensifying the N2O reduction intensity and reducing the N2O emission, and provide scientific parameters for the contribution of accurately estimating N2O emission in a farmland by the soil at the lower layer.

Description

technical field [0001] The invention relates to a method and device for measuring the diffusion and reduction process of nitrous oxide in soil, and belongs to the technical field of precision agriculture supporting experiments. Background technique [0002] Nitrous oxide (N 2 O) is one of the important greenhouse gases, soil is an important emission source of atmospheric nitrous oxide, soil N 2 O emission depends on the formation of N in the soil 2 The diffusion of O and the reduction intensity during the diffusion process. However, domestic and foreign soil N 2 Most O emission studies use the static box method to measure the soil surface, and the N produced in the soil 2 Diffusion and reduction process of O and N production from subsoil 2 Research on the contribution of O to surface emissions is very weak, mainly because a suitable method for the quantitative determination of N 2 Diffusion of O in soil and its reduction intensity during the diffusion process. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00G01N30/02
Inventor 张玉铭胡春胜秦树平董文旭
Owner INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI
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