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Method for measuring relative gas diffusion coefficient of soil under different soil water potentials and volume weights

A technology of gas diffusion and soil water potential, applied in diffusion analysis, soil material testing, measuring devices, etc.

Pending Publication Date: 2022-04-15
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there is no method that can reveal the relationship between field soil water potential and soil relative gas diffusion coefficient corresponding to different soil bulk density states under indoor conditions.

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  • Method for measuring relative gas diffusion coefficient of soil under different soil water potentials and volume weights
  • Method for measuring relative gas diffusion coefficient of soil under different soil water potentials and volume weights
  • Method for measuring relative gas diffusion coefficient of soil under different soil water potentials and volume weights

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

[0033] The method for measuring the relative gas diffusion coefficient of soil under different soil water potentials and bulk densities provided by this application will be described in detail below.

[0034] This application proposes a method for measuring the relative gas diffusion coefficient of soil under different soil water potentials and bulk density, comprising the following steps:

[0035] Soil water potentia...

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Abstract

The invention discloses a method for measuring soil relative gas diffusion coefficients under different soil water potentials and volume weights, and belongs to the technical field of soil water potential and relative gas diffusion coefficient measurement. The method comprises the following steps: respectively measuring water potentials corresponding to soil cores with different preset volume weights by using a specific soil water potential measuring device, and respectively measuring oxygen diffusion coefficients corresponding to the soil cores with different preset volume weights by using a specific soil relative gas diffusion coefficient measuring device; and thus, the soil water potential and the soil relative gas diffusion coefficient value corresponding to each soil core with the preset volume weight are obtained. According to the method, the field soil water potential and the soil relative gas diffusion coefficient corresponding to different soil bulk density states can be simulated under the indoor condition, the soil air permeability can be measured, and emission of greenhouse gas N2O and the like can be predicted.

Description

technical field [0001] The invention relates to the technical field of measuring soil water potential and relative gas diffusion coefficient, in particular to a method for measuring soil relative gas diffusion coefficient under different soil water potential and bulk density. Background technique [0002] N 2 O (nitrous oxide) is a greenhouse gas and the main anthropogenic emission responsible for stratospheric ozone depletion. N in agricultural soils 2 O emissions in anthropogenic N 2 Dominant in O emissions, but the relative soil gas diffusion coefficient (D p / D o ) and N 2 The related research and measurement methods of O emission are very limited. As the soil moisture content increases, oxygen (O 2 ) to the soil is reduced. The nitrification and denitrification reactions in soil are aerobic and anaerobic processes respectively, and the increase of soil denitrification process and the transition of soil to anaerobic state will make soil N 2 O emissions increase....

Claims

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Application Information

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IPC IPC(8): G01N13/00G01N5/04G01N33/24
CPCG01N13/00G01N5/045G01N33/24G01N33/246G01N2013/003Y02A90/30
Inventor 李渊赵艺暄桑建辉沈禹颖
Owner LANZHOU UNIVERSITY
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