Inserted type in-situ soil leachate collecting device

Abstract

The invention discloses an inserted type in-situ soil leachate collecting device, belongs to the technical field of agricultural soil measurement study and aims to solve the problem of preferential flow of the traditional alfisol column. The inserted type in-situ soil leachate collecting device comprises a filtrate collecting unit, a negative-pressure sampling unit and a cleaning unit, wherein the filtrate collecting unit comprises a filter layer and a filtrate collector below the filter layer, the filtrate collector comprises an outer frame and a filtrate collecting cavity formed in the outer frame, and the filtrate collecting cavity is communicated with the negative-pressure sampling unit and the cleaning unit; the cleaning unit comprises a negative-pressure pump and a flushing pipe, and the negative-pressure pump is communicated with the filtrate collecting cavity through the flushing pipe; the negative-pressure sampling unit comprises a negative-pressure sampling pump, a water outlet pipe and a sampling bottle, one end of the water outlet pipe is communicated with the filtrate collecting cavity, and the other end of the water outlet pipe is communicated with the negative-pressure sampling pump and the sampling bottle. The device is convenient to mount and simple to operate, and the influence of preferential flow of the traditional alfisol column can be avoided; by means of the cleaning unit, blockage of the water outlet pipe during sampling can be prevented, and the service life of the device is prolonged.

Description

technical field [0001] The invention relates to the technical field of agricultural soil measurement and research, in particular to a plug-in in-situ soil leachate collection device. Background technique [0002] Soil solution is the general term for water in soil and its solutes, mainly including inorganic ions, organic ions, polymer ions and their salts. Soil solution comprehensively reflects the composition and activity characteristics of soil components, as well as seasonal dynamics and agricultural use. The soil solution is in close contact with the solid phase and maintains a dynamic equilibrium state with the solid phase surface. Its composition and activity change with changes in the external environment, which will directly affect the growth and development of crops and soil microorganisms, and also affect soil fertility. effective use, which in turn affects the growth of crops. [0003] As chemical pollutants enter the soil system through multiple channels, such ...

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Problems solved by technology

[0005] Traditional soil solution collection equipment usually includes leaching soil columns of different heights and outsourcing cylinders. When water flows in, the water will preferentially flow out from the junction of the soil and the cylinder, resulting in a high collection of leaching volume, and When the leaching tray used to collect the leachate is used for a long time, the soil lost from the soil will accumulate and the collection pipe will be easily blocked, which increases the difficulty in the use of the soil solution collection equipment, and the collected soil solution and field soil The real situation is quite different

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