Soil solution collecting device

Abstract

The invention relates to a soil solution collecting device which comprises a water taking tank, a connecting cylinder and a sampling box, an opening is formed in the upper side of the water taking tank, the sampling box is arranged below the water taking tank, an end cover is arranged on the upper side of the sampling box, the connecting cylinder is arranged between the sampling box and the water taking tank, a control box is connected to the connecting cylinder in a sleeving mode, and a water collecting pipe and a ventilation pipe are arranged in the connecting cylinder; the lower ends of the water sampling pipe and the breather pipe are inserted into the transition box; through reciprocating rotation of the control box, the control box drives the end cover to rotate, a soil aqueous solution in the sampling box is pressed into the transition box, meanwhile, the air pressure in the transition box is adjusted, the soil aqueous solution entering the transition box is pressed into the water taking tank, and the collection work of the soil solution is completed; in addition, the one-way valve is arranged in the through hole between the sampling box and the transition box, air in the transition box is prevented from entering the sampling box, pressure rise in the sampling box is avoided, air pressure in the sampling box is conveniently controlled, and a soil solution rapidly enters the sampling box.

Description

technical field [0001] The invention belongs to the technical field of soil science equipment, and in particular relates to a soil solution collection device. Background technique [0002] Soil solution refers to soil interstitial water containing solutes and dissolved gases. It is the main place for chemical reactions in the soil. Soil solution is also the most basic source of effective nutrients for crops. The nutrient content contained in it is an important basis for measuring soil fertility. Soil The solution concentrates on the complex response of the soil-crop-climate system that affects crop growth, so the study of soil solution chemistry is of great significance. [0003] In experimental research, it is often necessary to measure the contents of various elements in the soil solution at different depths to obtain the vertical migration law of different elements in the soil layer. For the collection of soil solution, Chinese patent publication CN204373958U discloses a ...

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Problems solved by technology

[0003] In experimental research, it is often necessary to measure the contents of various elements in the soil solution at different depths to obtain the vertical migration law of different elements in the soil layer. For the collection of soil solution, Chinese patent publication CN204373958U discloses a soil solution collection When the device is in use, it is necessary to use a vacuum pump to pump and depressurize the water intake cylinder, so that the water intake cylinder becomes a negative pressure state, and then close the control device, and the soil solution in the soil passes through the porous ceramic cup under the action of the pressure difference. Infiltrate into the water intake cylinder, collect for a certain period of time, open the control device, restore the normal pressure in the water intake cylinder, open the valve, use the syringe to extract the soil solution in the water intake cylinder through the water collection pipe, and pump it into the syringe. The operation process is complicated and Both collecting and taking out the soil solution are carried out in the water intake cylinder. The process of collecting the soil solution affects the collection process of the soil solution, and the efficiency is low. In view of the shortcomings of the existing technology, further improvement is needed

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