Comprehensive treatment method for saline-alkali land

Abstract

The invention provides a comprehensive treatment method for a saline-alkali land, and solves the problems in the prior art that the irrigation and drainage work amount is large, the input cost is high, and the improvement effect is discontinuous; salt leaching and water draining consume excessive water resources, and the water conservation is not facilitated; decline of the regional groundwater level is easily caused, and the crop growth is not facilitated; discharged saline-alkali water easily causes pollution to downstream water resources, and the healthy and sustainable development of the ecological environment is not facilitated. The comprehensive treatment method for the saline-alkali land comprises the following steps of (1) topsoil stripping, wherein saline-alkali soil on a surfacelayer of the saline-alkali land of a treatment area is stripped for standby application; (2) sand cooperating and salt pressing, wherein the saline-alkali soil and sand are mixed uniformly, then backfilled to the surface of the saline-alkali land of the treatment area, and leveled and used as a soil cultivation layer; and the sloping ratio does not exceed 0.5%; (3) alkali discharge engineering, wherein alkali discharge ditches are dug on the leveled saline-alkali land of the treatment area in step (2), so that the alkali discharge ditches form a system and are distributed in a web shape; (4) water storage engineering, water storage ditches are dug on the lower terrain portion in the saline-alkali land of the treatment area, so that the water storage ditches are connected into a system anddistributed in a web shape.

Description

technical field [0001] The invention belongs to the field of land improvement engineering, and in particular relates to a comprehensive treatment method for saline-alkali land. Background technique [0002] Saline-alkali land refers to a type of land where the salt contained in the soil affects the normal growth of plants and even causes the death of plants. When a plant absorbs more salt, it will change the structure and function of the cell membrane, and eventually cause the plant to die; moreover, the salt in the soil increases the osmotic pressure of the soil, which creates resistance to the absorption of the plant root, making it difficult for the plant to absorb water , followed by cell dehydration, plant wilting, and eventually plant death. [0003] Soil salinization is not only a comprehensive problem involving agriculture, land and water resources, but also a typical ecological environment problem. The impacts of soil salinization or salinization on agriculture, e...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large irrigation and drainage works in the above-mentioned prior art, high investment cost, and unsustainable improvement effect; too much water resources are consumed for washing and draining salt water, which is not conducive to water saving; it is easy to cause the groundwater level in the area to drop, It is not conducive to crop growth; the drained saline-alkali water is easy to pollute the downstream water source, which is not conducive to the healthy and sustainable development of the ecological environment, and provides a comprehensive saline-alkali land management method to effectively improve soil salinization and ensure arable land resources sustainable use of