Device and method for improving saline land

Abstract

The invention relates to a device and a method for improving a saline land, wherein, the device comprises an isolation layer arranged on the partial periphery of an afforestation-waiting area, and a main blind drain and an auxiliary blind drain used for draining salt and alkali and arranged above the critical water level in the afforestation-waiting area, and the water outlets of the main blind drain and the auxiliary blind drain lead to a water-collecting well, the level surface of which is lower than the blind drains. The method comprises the flowing steps: arranging the isolation layer, laying the blind drains, constructing the water-collecting well, and improving physical and chemical soil properties. The invention has the advantages that the invention can fully use various solid wastes as main materials available to improve the saline land and conduct the improvement on the saline land through the combination of physical, chemical, biological methods; the various solid wastes can be used for constructing the main blind drain, the auxiliary blind drain and the water collecting well, and controlling the water table; a tree microarea is planted, physical and chemical soil properties on a surface layer are improved, and the salt content of the soil is reduced; and indigenous plants and new plant species with the saline-alkali resistance are selected for being planted, and the forestry afforestation and the landscaping are achieved through the post-stage nursing, long-term salinity control and alkaline control measures.

Description

technical field [0001] The invention relates to a device and method for improving saline-alkali soil, which is particularly suitable for the improvement and treatment of saline-alkali soil mainly containing sodium chloride. Background technique [0002] The essence of saline-alkali land is that the soil contains too much soluble salt or the sodium ion saturation on the soil colloid is too large, which will cause biological toxicity to plants or soil microorganisms, and at the same time destroy the structure of the soil, resulting in compaction of the soil structure and poor permeability. Poor soil properties such as low-quality soil and high soluble salts will definitely antagonize the plant nutrients. Therefore, the direct harm of saline-alkali soil to plants is that it cannot provide normal water, fertilizer, air, and heat conditions for plants, and the biological toxicity of saline-alkali components makes plants unable to grow normally and even die. The customary method ...

AI Technical Summary

Problems solved by technology

At present, methods such as underground pipe drainage, deep plowing and leveling, large water washing of salt, and biological screening of saline-alkali-tolerant plants have been applied to the planting of trees and shrubs in forestry or landscaping, but these technologies lack integration and optimization, and cannot achieve long-term salt control and greening the goal of

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