Farmland greenhouse-gas monitoring sampling device

Abstract

The invention belongs to the technical field of agriculture, forestry and ecological environments, and particularly relates to a farmland greenhouse-gas monitoring sampling device. The farmland greenhouse-gas monitoring sampling device comprises a box and base which are matched in shape. An air drawing hole is formed in the box, a rubber plug is arranged on the air drawing hole, the base is of a circular-ring frame structure integrating an inner layer and an outer layer, and the corresponding box is of a cylindrical structure; the cross section of the base is a wedge, and the bottom of the base is in a cutter-opening shape; an annular sealing groove higher than the base is formed in the edge of the base, and the lower portion of the box is embedded into the sealing groove in a matched mode; the base is made from nylon. The farmland greenhouse-gas monitoring sampling device is small in volume, convenient to carry and transport and high in monitoring accuracy rate.

Description

Technical field [0001] The invention belongs to the technical fields of agriculture, forestry, and ecological environment, and specifically relates to a farmland greenhouse gas monitoring and sampling device, which is used for synchronous monitoring of the greenhouse gas emission flux of the terrestrial ecosystem. Background technique [0002] With the increase of greenhouse gas emissions, global warming has intensified, energy conservation and emission reduction have attracted the attention of countries all over the world, and extensive research has also been conducted on greenhouse gas emissions in farmland. The static box method is widely used in the simultaneous monitoring of greenhouse gas emission fluxes in terrestrial ecosystems because of its strong adaptability, simple structure and operation, low cost and high sensitivity. [0003] Since static box sampling requires a contact surface with the soil surface, it is generally equipped with a base. Most of the existing static...

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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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