Sampling device and method of microorganism crust soil column

Abstract

The invention relates to a sampling device of a microorganism crust soil column. The sampling device comprises a cutting ring, a polyvinyl chloride (PVC) pipe and an ejector, wherein the PVC pipe is opposite to the cutting ring, soil to be sampled is obtained through the cutting ring, and the soil in the cutting ring is pushed from the inside of the cutting ring into the PVC pipe through the ejector. A sampling method includes that the soil column is obtained firstly through the cutting ring, the PVC pipe is put at the upper edge of the cutting ring for alignment, the soil column at the lower edge of the cutting ring is slowly and originally pushed into the PVC pipe through the ejector, and the bottom of the PVC pipe is sealed and buried under soil. By means of the sampling device and method of the microorganism crust soil column, the soil column is integrally transferred into the PVC pipe at a time, the device and the method are simple and practical, costs can be saved, and the integrity of the crust soil column structure can be excellently maintained.

Description

technical field [0001] The invention relates to a sampling device and method for microbial crusts, and is mainly aimed at the sampling method for microbial crusts in forest land. Background technique [0002] Microbial crusts play an important role in the ecosystem of arid areas, which can affect the structure, function, and productivity of soil in arid areas, including soil stability, soil water retention, carbon and nitrogen fixation, and soil fertility. In the research on the evaporation of microbial crusts on soil surfaces such as woodlands and sandy lands, due to the looseness of sandy loam soil in woodlands, the connection between crusts and soil is not tight enough. The soil has a complete structure. After taking the soil column with a ring knife and transferring it to a PVC pipe with a traditional shovel, the original crust and soil structure will be destroyed, resulting in cracking of the surface crust and damage to the soil structure; After directly taking the cru...

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Problems solved by technology

In the research on the evaporation of microbial crusts on soil surfaces such as woodlands and sandy lands, due to the looseness of sandy loam soil in woodlands, the connection between crusts and soil is not tight enough. The soil has a complete structure. After taking the soil column with a ring knife and transferring it to a PVC pipe with a traditional shovel, the original crust and soil structure will be destroyed, resulting in cracking of the surface crust and damage to the soil structure; After directly taking the crust soil column with the knife, the ring knife soil column is buried in the soil as it is for the test. The later test requires about 32 treatments, which not only increases the cost of the test, but also may cause the ring knife to Rust will affect the physical and chemical properties of the crusted soil column, etc., so it is necessary to reduce the test cost and complete the transfer of the crusted soil column.

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