Soil greenhouse gas emission flux calculation method

Abstract

The invention provides a soil greenhouse gas emission flux calculation method, and relates to the technical field of greenhouse gas detection. The method comprises the following steps: filling the soil culture device with soil to be detected; putting the soil culture device into a gas collection device; greenhouse gas generated by soil is collected from a gas collection device, and the emission flux F is calculated; wherein the calculation formula of the emission flux F is F = [273 * rho * V * (delta C / delta t)] / [S1 * (273 + T)], in the formula, rho is the density of the greenhouse gas in the standard state, V is the volume of the greenhouse gas in the gas collection device, delta C / delta t is the concentration change of the greenhouse gas in the gas collection device in the gas collection process, S1 is the surface area of the soil culture device, and T is the average temperature in the gas collection device in the gas collection process. According to the method, more soil can be cultured, the operation is simple during air exhaust, the labor intensity is reduced, and the emission flux F of the soil greenhouse gas can be accurately and quickly calculated.

Description

technical field [0001] The invention relates to the technical field of greenhouse gas detection, in particular to a calculation method for soil greenhouse gas emission flux. Background technique [0002] In the context of global warming, more and more studies focus on greenhouse gas emissions. Previous studies mostly used static chamber-gas chromatography to study greenhouse gas emission fluxes, and the main experimental methods were field in-situ monitoring and indoor cultivation. In field in situ monitoring, barrels and bases made of alloy materials are often used for greenhouse gas collection. When collecting gas, add water to the circular base to ensure airtightness, and buckle the barrel upside down on the base for pumping. In indoor experiments, jars are often used for soil sample cultivation. Collect a small amount of soil for cultivation, seal the top with a cover, and drill holes in the cover to facilitate air extraction. After the collected gas is measured by a...

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Problems solved by technology

[0003] At present, in-situ monitoring of greenhouse gas emissions in the field is mostly used, and its monitoring and calculation methods cannot meet the needs of soil cultivation and calculation of greenhouse gas emissions under indoor control experiments.

The existing in-situ soil cultivation and gas collection devices in the field are relatively cumbersome in actual operation, and the alloy base is inserted into the soil to form a relatively closed "independent environment", and there is less exchange of various elements in the natural environment soil

The amount of soil cultivated by the existing indoor cultivation device is small, which cannot represent the environmental soil conditions on a large spatial scale, and the calculated flux often varies greatly, and it is difficult to ensure the airtightness of the cover during the pumping process after the hole is drilled

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