Sampling method and sampling device for millimeter-scale micro-domain soil layer in vertical soil profile

Abstract

The invention discloses a soil vertical section millimeter micro domain soil layer sampling device. The sampling device comprises an uncovered square box body (1), wherein at least two partition pieces (2) arranged in parallel are distributed in an inner cavity of the square box body (1) from bottom to up; the partition pieces (2) are matched with the inner cavity of the square box body (1); the partition pieces (2) are parallel to the bottom surface of the square box body (1); two adjacent partition pieces (2) are bonded seamlessly; the partition piece (2) arranged at the lowermost side of the inner cavity of the square box body (1) is bonded seamlessly with the bottom surface of the square box body (1). At the same time, the invention further provides a soil vertical section millimeter micro domain soil layer sampling method performed with the sampling device. The sampling device and sampling method are suitable for researching water-flooded soil environment, the sampling method of the soil layer of the millimeter micro domain in the vertical direction of a soil-water interface is simplified, and the distinguish of soil millimeter micro domains suitable for soil biological and soil chemical property detections is realized.

Description

technical field [0001] The invention relates to a sampling method of millimeter-level micro-domain soil layer in a vertical section of soil and a sampling device used therefor. Background technique [0002] Since the publication of an article in Science in 2008 clearly stated that microorganisms are the engine driving the biogeochemical cycle of the earth's surface, and in 2010, EnvironmentScience&Technology published a special issue on the biogeochemical process of oxidation-reduction, surrounding the oxidation of the soil-water interface in flooded soil- The research on the degradation behavior of pesticide interface driven by microorganisms under the regulation of reduction reaction has become the latest scientific frontier in the interdisciplinary field of international soil science and environmental science in the past three years. [0003] There is a redox gradient microenvironment of aerobic-facultative anaerobic-anaerobic in the vertical direction in flooded soil. T...

AI Technical Summary

Problems solved by technology

Ultimately, the researchers were biased when evaluating the tested soil microbial indicators

[0005] Because the above method needs to be frozen in specific operations, it will lead to changes in the original physical, chemical and biological properties of the soil, such as oxidation-reduction potential, microbial community structure and diversity, etc., and the actual thickness of the slice needs to be obtained through post-calculation , so it is impossible to track the response changes of soil biological and biochemical properties in millimeter-scale micro-domains under the stress of target pollutants

Therefore, the inherent technical defects of conventional research methods are not conducive to detailed research on the migration and transformation of target pollutants in environmental micro-domains with gradient changes in oxidation-reduction conditions, and there is an urgent need to innovate existing sampling methods for soil profile micro-domains

Images