A drainage desalination system for saline-alkali land improvement

Abstract

The invention relates to a drainage and desalination system for improving saline-alkali land, comprising a horizontal drainage salt-discharging body, a vertical drainage salt-discharging body and a drainage ditch. The bamboo section is filled with cotton straw sections, and the cotton straw sections are wrapped with geotextiles; the vertical drainage and salt discharge body is a hollow bamboo piece, and the hollow bamboo piece is filled with carbonized cotton straw particles, and the carbonized cotton The straw pellets are also wrapped with geotextiles. The invention can quickly wash salt and discharge salt in saline-alkali land without causing damage to the land surface, can improve the desalination effect on the upper soil, and does not require large-scale excavation construction, and is not only suitable for desalination improvement of newly filled saline-alkali soil, It can also be used for the improvement of old saline-alkali land.

Description

technical field [0001] The invention relates to a drainage desalination system for improving saline-alkali land, belonging to the technical field of saline-alkali land improvement and treatment. Background technique [0002] According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, and China is 99.13 million hectares. The main obstacles to resource utilization of saline-alkali land are high salt content, low organic nutrient content, fragile regional ecological environment, and low agricultural economic benefits. With the pressure of population, resources and environment, the improvement of saline-alkali land as a reserve land resource has become the key. [0003] At present, for the restoration and improvement of saline-alkali land, physical restoration is one of the commonly used measures and means. Physical restoration is to use the principle of water and salt movement to take water conservancy engi...

AI Technical Summary

Problems solved by technology

If it is used in the old saline-alkali land, large-scale excavation construction is required, and the cost is very high

[0007] 3) The underground pipe only controls the anti-salt of the groundwater, but does not maintain and improve the desalination of the upper soil in a long-term and stable manner

[0008] 4) Most of the underground pipes are made of plastic or PVC. The degradation rate of plastic or PVC is very slow, and the plasticizers and heavy metals contained in them will also cause soil pollution.

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