Method for rapidly improving and fertilizing severe saline-alkali soil

Abstract

The invention relates to the technical field of soil improvement, in particular to a method for quickly improving and fertilizing severe saline-alkali soil, which comprises the following steps: S1, digging main drainage ditches on the severe saline-alkali soil every 110-150 m, forming sub-drainage ditches on formed ridges at intervals of 8-9 m, connecting the sub-drainage ditches with the adjacent main drainage ditches through water pipes, arranging a water collecting well beside the severe saline-alkali soil, and connecting the main drainage ditches with the water collecting well through water pipes; S2, plugging the water collecting well, injecting water into the severe saline-alkali soil to steep the field, enabling the water surface to be 1.6-1.8 cm higher than the soil surface, and draining accumulated water into the water collecting well after steeping the field for 5 days. The method effectively solves the problems that the way of irrigation and salt drainage is generally adopted in improvement management of the severe saline-alkali soil at present, salt drainage ditch and alkali diainage ditch construction is carried out by a large number of engineering technologies, mass irrigation achieves the salt leaching effect after completion, the improvement method needs 3-5 years to enable the severe saline-alkali soil to be suitable for planting crops, and longer time is consumed.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a method for rapidly improving and fertilizing severe saline-alkali land. Background technique [0002] Saline-alkali soil refers to soil with a salt content of more than 2%. Soil salinization not only reduces soil productivity, but also causes many ecological and environmental problems. Xinjiang, Inner Mongolia, and Qinghai are the three provinces with the largest saline-alkali land area in my country. The area of ​​saline-alkali land accounts for about 40% of the national saline-alkali land area; among them, the area of ​​severe saline-alkali land accounts for more than half of the area of ​​saline-alkali land. Therefore, land salinization, especially severe saline-alkali land, has become a major constraint for agricultural development and ecological environment improvement in the Northwest China. Constraints. [0003] At present, the improvement and management of sever...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for quickly improving and fertilizing severe saline-alkali land, so as to solve the problem that the improvement and management of severe saline-alkali land usually adopts the way of irrigation and salt discharge, and a large number of engineering technologies are used to carry out the construction of salt drainage ditch and alkali drainage ditch. After the large-scale irrigation achieves the effect of "washing salt", this improvement method needs 3-5 years to make the severely saline-alkali land suitable for planting crops, which takes a long time