Soil respiration measurement culture and gas collection device and measurement method thereof

Abstract

A soil respiration measurement cultivation and gas collection device and its measurement method, relating to a soil measurement device and its measurement method, the device comprises a culture bottle, a rubber cap, a narrow neck of a culture bottle, a connecting tube, a culture bottle mouth, and a rubber stopper , two-way valve, gas sampler; the rubber stopper is connected to the top opening of the culture bottle, one end of the communication tube passes through the rubber stopper to connect with the inside of the culture bottle, the other end is connected to the two-way valve, and the rubber cap is connected to the neck of the side wall of the culture bottle , the gas sampler is connected with the two-way valve; the method includes weighing the soil sample, connecting the culture device, covering the rubber stopper, installing the connecting pipe, carrying out airtight culture, gas collection, and measuring CO in the gas. ₂ Content; re-cultivation, soil respiration intensity measurement. The design of the whole device of the present invention is simple; the loss caused by steps such as pipetting and titration in the traditional method and the test operation error are avoided in the process of measuring the respiratory intensity of the method, and the measured data is reliable.

Description

technical field [0001] The invention relates to a soil measurement device and a measurement method thereof, in particular to a soil respiration measurement cultivation and gas collection device and a measurement method thereof. Background technique [0002] Soil respiration refers to the process by which soil produces and releases carbon dioxide to the atmosphere, and is a key process in regulating the carbon cycle of the earth system and climate change. Soil respiration intensity is the embodiment of soil microbial activity, which represents the exuberance of soil metabolism and can be used to measure the intensity of microbial life activities. It is one of the important biological parameters studied in the fields of soil science and environmental science. [0003] The indoor culture method is currently the most widely used device for studying soil respiration. It is to put the soil to be tested into a closed device and cultivate it under predetermined conditions. The devi...

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Problems solved by technology

But this method also has certain limitations, mainly because when using this method, the absorption bottle and the soil sample filled with NaOH are all placed at the bottom of the container, and the working surface area of ​​the absorption bottle and the soil sample has a great influence on the test results. In addition, There is also the need to transfer the liquid in the absorption bottle to the triangular flask for titration during post-processing, which increases the experimental error, so there are problems of unstable measurement results and unsatisfactory repeatability

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