Saline-alkali land restoration method by improving soil

Abstract

The invention discloses a saline-alkali land restoration method by improving soil. The method includes the following steps that 1, flushing is conducted, wherein a trench with the depth of 2.3-2.4 m is dug around to-be-remedied soil, a cement plate is inserted in the trench, a water suction pump is used for pumping water to flush the to-be-remedied soil once every 4-7 days, and flushing is continuously conducted for 7-11 times; 2, the soil is ploughed repeatedly in a turning mode, and a restoration agent is spread, so that the restoration agent is mixed evenly with soil of the saline-alkali land and can enters the bottommost portion of a soil layer and saline-alkali soil in the deep of the ground can be conveniently remedied; 3, at the same time, after crops are harvested, plant ash obtained after incineration returns to the saline-alkali land again, the pH value of the saline-alkali land can be greatly improved, the properties of the land are thus improved, and replantation in the later period is facilitated.

Description

technical field

[0001] The invention belongs to the technical field of land restoration, and in particular relates to a restoration method for improving saline-alkali land. 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. From the perspective of soil structure, saline-alkali land is all compacted soil. The air permeability and water permeability of the soil are very poor, and the salt is mixed in In compacted soil, it is difficult to be separated, resulting in precipitation year by year, and the salt content is getting higher and higher. However, when the existing saline-alkali land is repaired, the repair is not complete, and the soil surface is often repaired; after a long time, The salt in the bottom soil will return to the surface; at the same time, in the process of land restoration in the past, crops were also planted on saline-alkali land, but after the ...