Earthworm sampling device for evaluating soil quality based on ecological characteristics of earthworm population

Abstract

The invention discloses an earthworm sampling device for evaluating soil quality based on ecological characteristics of an earthworm population. The earthworm sampling device comprises an earthworm sampling barrel formed by vertically splicing a plurality of sections of sampling and storing sub-barrels, a sampling drill bit for drilling into soil, and a cover plate for fixing the earthworm sampling barrel, the sampling drill bit is positioned at the lower end of the earthworm sampling barrel and is detachably connected with the sampling and storing sub-barrel at the lowermost end of the earthworm sampling barrel; the cover plate is positioned at the upper end of the earthworm sampling barrel and is detachably connected with the sampling and storing sub-barrel at the uppermost end of the earthworm sampling barrel; the collecting and storing sub-barrels comprise collecting barrels and storing barrels which are sleeved inside and outside, the inner walls of the storing barrels and the outer walls of the collecting barrels are fixedly connected through temperature and humidity control boxes, and the lower end faces of the collecting barrels are connected with gates capable of being controlled to be opened and closed. According to the invention, sampling operation can be conveniently carried out on soil and earthworms at different depths, so that interference-free data of soil and earthworms at different depths can be obtained.

Description

technical field [0001] The invention relates to the technical field of ecological risk assessment, in particular to an earthworm sampling device for evaluating soil quality based on the ecological characteristics of earthworm populations. Background technique [0002] Soil is the source and sink of various pollutants in the environment. Composite pollution systems in which multiple pollutants coexist are ubiquitous in soil. Soil quality evaluation can be realized through pollutant detection. Soil quality evaluation generally involves a single pollutant. Single evaluation and multiple evaluations of multiple pollutants, different types of pollutants have different effects on soil quality, so it can also be divided into organic pollution evaluation, heavy metal pollution evaluation, biological pollution evaluation and Radioactive contamination assessment, etc. [0003] Earthworms can improve soil structure, decompose soil organic matter, improve soil nutrient transformation e...

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Problems solved by technology

[0003]Earthworms can improve soil structure, decompose soil organic matter, improve soil nutrient conversion efficiency, and promote soil microbial communities, etc., and play a vital role in maintaining soil ecosystems According to the research, the ecological characteristics of earthworm populations can effectively reflect the quality of the soil. Earthworms are usually collected by inserting electrodes into the soil and stimulating the earthworms to come out of the soil through electric current. However, this affects to a certain extent The biological activity of earthworms cannot objectively reflect the ecological characteristics of earthworm populations in soil

[0004]At the same time, in order to obtain the ecological characteristics of earthworm populations in different depths of soil, it is very likely that the surface soil will be carried into the deep soil by ordinary excavation methods, and it is difficult to obtain the ecological characteristics of earthworm populations that meet the requirements. The multi-layered soil with different depths and without interference will affect the accuracy of soil quality evaluation results based on the ecological characteristics of earthworm populations; therefore, an earthworm sampling device is now needed to solve the above problems

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