Small static chamber for farmland greenhouse gas monitoring and sampling

Abstract

The invention belongs to the technical field of agriculture, forestry and ecological environment and particularly relates to a small static chamber for farmland greenhouse monitoring and sampling. The small static chamber comprises a chamber body, an extractor vent with a rubber plug is arranged in the chamber body, and an atmosphere equalizing valve which is of a vent pipe 3-4mm in diameter and inserted in the chamber body is fixedly mounted on the chamber body; the chamber body is 1.10-1.28L in size; in the small static chamber, the vent pipe is vertically arranged at the top of the chamber body, a clamp platform is arranged between the insert end of the vent pipe and the top of the chamber body, and a pressure head is fixedly connected between the external extension end of the vent pipe and the top of the chamber body in a threaded manner. The small static chamber is small in size, convenient in carrying and transportation and high in monitoring accuracy.

Description

technical field [0001] The invention belongs to the technical fields of agriculture, forestry and ecological environment, and in particular relates to a small static box for monitoring and sampling farmland greenhouse gases, which is suitable for synchronous monitoring of greenhouse gas emission fluxes in terrestrial ecosystems. Background technique [0002] With the increase of greenhouse gas emissions and the intensification of global warming, energy conservation and emission reduction have been paid attention to by countries all over the world, and extensive research has been carried out on farmland greenhouse gas emissions. Due to its strong adaptability, simple structure and operation, low cost and high sensitivity, the static box method is widely used in the simultaneous monitoring of greenhouse gas emission fluxes in terrestrial ecosystems. [0003] The sizes of static boxes currently used are different, and generally different sizes are set for different ecological t...

AI Technical Summary

Problems solved by technology

At present, the volume of the static box used in China is mostly about 3L. The advantage of the large-volume static box is that the sampling area is large and the accuracy is slightly higher, but there are many shortcomings, such as uneven gas mixing in the box, which is easy to make the extracted gas The concentration is low; according to the general requirements of field experiments, each treatment requires a certain amount of repetitions, the number of static boxes is required to be large, and the static boxes need to be retrieved from the farmland after the observation is completed. The static box has the problem of being inconvenient to carry; the static box has a large volume, and there are disadvantages that the contact surface is difficult to seal when the ground is in contact, and the disturbance is large

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