Sampling device and leaching device for nitrogen migration and transformation, sampling method and method for researching nitrogen migration and transformation

A leaching and migration technology, applied in the field of soil science, can solve the problems of difference, soil pH rise, microbial activity, decline, etc.

Pending Publication Date: 2022-02-01
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the destructive sampling of soil, the soil habitat has changed dramatically, resulting in significant changes in soil nutrient content and soil physical and chemical properties
Especially for forest ecosystems, due to the low soil moisture content, large soil particle size, and significant vertical changes in profile soil nutrients and properties, destructive sampling will cause instability and instability in the determination of soil physical, chemical and biological indicators. Significant difference
Some studies have shown that after soil samples are collected back to the laboratory, due to the evaporation of water, the content of soil carbon and nitrogen nutrients will increase significantly, the soil pH will increase, and the microbial activity will decrease.
In order to avoid the change of soil properties due to destructive sampling and affect the research results, it is urgent to provide a device that can avoid destructive sampling

Method used

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  • Sampling device and leaching device for nitrogen migration and transformation, sampling method and method for researching nitrogen migration and transformation
  • Sampling device and leaching device for nitrogen migration and transformation, sampling method and method for researching nitrogen migration and transformation
  • Sampling device and leaching device for nitrogen migration and transformation, sampling method and method for researching nitrogen migration and transformation

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Experimental program
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Embodiment 1

[0056] See Figure 3-4 , the present embodiment provides a kind of leaching device of nitrogen migration conversion, with a beaker as a collector, with a filter disc as a filter, with fiber as a filter material, and the material of the sampler is stainless steel, by the sampler 1, the filter material 4. The filter disc 5 and the collector 6 are composed. Quartz sand and soil column soil were placed sequentially inside the sampler to form a 1.0cm thick quartz sand layer.

Embodiment 2

[0058] 1. Set the undisturbed soil column:

[0059] Materials and tools: Stainless steel sampler; metal sledgehammer; sleepers and measuring tape.

[0060] Before setting up the undisturbed soil column, according to the typical sample selection method, the subtropical typical forest type soil in Dashanchong Forest Park, Changsha City, Hunan Province was selected as the research object (clay loam, parent material is shale and slate shale, nitrogen content 1.0-2.0g / kg ). In August 2018, ground litter was removed first, and the ground surface was cleaned and leveled without damaging the soil structure. Afterwards, the sampling range is defined, and the sampling interval is measured with a tape measure and the sampling points are determined. A stainless steel sampler 1 with a diameter of 8.0 cm and a height of 25.0 cm was artificially driven vertically into the ground at the sampling point. When driving in, a sleeper was placed above the sampler to facilitate construction, and t...

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Abstract

The invention belongs to the technical field of soil science, and particularly relates to a sampling device and leaching device for nitrogen migration and transformation, a sampling method and a method for researching nitrogen migration and transformation. The sampling device provided by the invention comprises a sampler (1); the sampler (1) is in the shape of a cylindrical straight tube, the top of the sampler is flat, a knife edge inclined plane is designed at the bottom of the sampler, and the width of the inclined plane is 10-15mm. The sampler (1) is in the shape of a cylindrical straight tube, the shape of soil is directly fixed, a soil sample is not disturbed during sampling, undisturbed soil column soil which is as close as possible under field natural conditions is obtained, the natural water content and structure of the soil are kept, and various physicochemical indexes and biological indexes of the sampled soil are not affected.

Description

technical field [0001] The invention belongs to the technical field of soil science, and specifically relates to a sampling device, a leaching device, a sampling method and a method for studying nitrogen migration and transformation. Background technique [0002] The primary issue in the study of nitrogen cycle in terrestrial ecosystems is the biogeochemical cycle of soil nitrogen. Due to the limitation of field conditions, the research process usually requires a large number of soil samples to be brought back to the laboratory for analysis and determination. However, due to destructive sampling of soil, the soil habitat has undergone tremendous changes, resulting in significant changes in soil nutrient content and soil physical and chemical properties. Especially for forest ecosystems, due to the low soil moisture content, large soil particle size, and significant vertical changes in profile soil nutrients and properties, destructive sampling will cause instability and ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08G01N1/28G01N33/24
CPCG01N1/08G01N1/28G01N33/24
Inventor 丁咸庆彭佩钦常月侯红波龙坚
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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