Device for collecting undisturbed soil column leaching solution and performing surface runoff experiment

Abstract

The invention relates to the field of soil ecology, and particularly discloses a device for collecting an undisturbed soil column leaching solution and performing a surface runoff experiment. The device comprises a surface runoff collector, a filter screen, a rubber pipe, a pore plate, a funnel, a container and a support table which match and are connected with one another, so that test conditions can be strictly controlled, errors can be reduced, and according to different grassland degradation types, the content change and migration law of substances in soil of different grassland degradation types can be researched. The device can collect surface runoff and the soil leaching solution at the same time, reduces the loss of the leaching solution and the surface runoff, greatly improves the collection efficiency, is simple to operate, and saves the cost.

Description

technical field [0001] The invention relates to the field of soil ecology, in particular to a device for collecting undisturbed soil column leaching solution and surface runoff experiments. Background technique [0002] Soil is an important means of production and environmental resource, which provides nutrients and various mineral elements for plants in the process of plant growth and development. Due to changes in the global climate, increasing population, frequent pests and rodents, and the increasing unreasonable management and irrational use of grasslands by humans, the resource and environmental problems of grassland ecosystems have become prominent, and grassland degradation has become a serious problem. , threatening the local economy and ecological security. [0003] Grassland degradation reduces the grassland vegetation and coverage rate, resulting in bare ground, and the surface soil suffers from water erosion and wind erosion for a long time. Finally, the soil's...

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Problems solved by technology

[0003] Grassland degradation reduces grassland vegetation and coverage rate, resulting in bare ground surface, surface soil has been subjected to water erosion and wind erosion for a long time, and finally the soil's ability to retain water and fertilizer is reduced, resulting in serious nutrient and soil erosion

Due to the reduction of grassland vegetation coverage and water and fertilizer retention capacity, the nutrients and trace elements in the soil will flow away with the water flow in the form of surface runoff or leaching solution during rainfall, making the soil unable to provide the nutrients needed for plant growth and development. lead to further degradation of grasslands

The research on undisturbed land surface runoff and leaching solution is also a problem that needs to be improved in the existing technology. For example, the patent CN202033343U provides a simple experimental device for simulating soil column leaching and volatilization, and simulates field experiments to study soil column leaching. , but its intelligent control of water addition and water addition speed cannot strictly control other conditions, and it cannot be adjusted according to different site types, which limits its research

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