Saline-alkali soil treatment method

Abstract

The invention relates to a saline-alkali soil treatment method. The method comprises the steps of establishing a concealed pipe salt drainage system under coastal original saline-alkali soil, and enabling concealed pipes of the concealed pipe salt drainage system to be 1m-2m away from the ground; enabling a rubble layer and a zeolite and rubble mixing layer which have a total thickness of 15-35cm to be laid above the concealed pipes, enabling the rubble layer and the zeolite and rubble mixing layer to form double salt separation layers, enabling the volume ratio of zeolite to rubble to be (0.5-1):(0.8-3) in the zeolite and rubble mixing layer, and after the laying is finished, laying a geotextile on a surface layer of the zeolite and rubble mixing layer; enabling furfural residue and the original soil to be evenly mixed according to the volume ratio of (0.5-2):(10-20), performing backfill and compaction, and forming a furfural residue and original soil improvement layer; watering the soil slowly until moisture in the soil reaches a saturated state and then irrigating the soil with great water, and eliminating salt in the soil through the concealed pipe salt drainage system until the average total salt content of the salt in soil within one meter is smaller than or equal to 0.5%. The saline-alkali soil treatment method is a comprehensive treatment method integrating various modes in engineering, water conservancy, physics and biology and the like.

Description

technical field [0001] The invention relates to a soil treatment method, in particular to a saline-alkali land treatment method. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. [0003] In the existing saline-alkali land treatment schemes, the simple gravel salt discharge method is often adopted; this simple salt discharge method can easily lead to the migration of salinity and alkali to the upper layer of the soil. Contents of the ...

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Problems solved by technology

[0003] In the existing saline-alkali land treatment plan, the simple gravel salt discharge method is often used; this simple salt discharge method can easily lead to the migration of saline-alkali to the upper layer of the soil

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