Method for afforestation on saline-alkali soil

Abstract

The invention discloses the technical field of saline-alkali soil improvement, and particularly relates to a method for afforestation on saline-alkali soil. The method comprises the following steps that firstly, ditches are dug in the saline-alkali soil; secondly, the saline-alkali soil is subjected to irrigation and salt leaching; thirdly, planting ditches are dug between the adjacent ditches; fourthly, two rows of young trees are planted in the planting ditches; fifthly, fingerlings are thrown into the ditches. The saline-alkali soil can be subjected to irrigation and salt leaching so that the improvement of the saline-alkali soil can be accelerated; the ditches can serve as a drainage system of the saline-alkali soil, and salt in the saline-alkali soil can be dissolved by introducing fresh water so that saline-alkali components in the saline-alkali soil can be effectively reduced; the young trees are planted in the planting ditches; due to the fact that soil salt in the saline-alkali soil is evaporated along with water, and most of the salt is left on the surface of the soil so that the salt can be accumulated on the backs of the ditches, the damage of the salt to tree root systems is reduced, and the survival and growth of the young tree are facilitated.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land improvement, in particular to a method for afforestation on saline-alkali land. Background technique [0002] Saline-alkali land means that the land is affected by natural or human factors, causing salt substances to gradually penetrate into the soil, so that the soil contains more salt and alkali, and makes this type of land unusable. The saline-alkali land in China is roughly distributed The area is in the northwest, northeast, north China and coastal areas. The main reason for the formation of saline-alkali land is that the land in relatively arid areas evaporates into water vapor and is discharged into the air, but the salt in the water cannot be eliminated and remains in the air. In the soil, after a long period of accumulation, the salt in the soil gradually increases, thus forming a saline-alkali land. Human factors are also one of the main reasons for the gradual salinization of...

AI Technical Summary

Problems solved by technology

[0002] Saline-alkali land means that the land is affected by natural or human factors, causing salt substances to gradually penetrate into the soil, so that the soil contains more salt and alkali, and makes this type of land unusable. The saline-alkali land in China is roughly distributed The area is in the northwest, northeast, north China and coastal areas. The main reason for the formation of saline-alkali land is that the land in relatively arid areas evaporates into water vapor and is discharged into the air, but the salt in the water cannot be eliminated and remains in the air. In the soil, after a long period of accumulation, the salt in the soil gradually increases, thus forming a saline-alkali land. Human factors are also one of the main reasons for the gradual salinization of the land. Due to artificial irrigation and cover, the groundwater level continues to rise. , the salt substances contained in the surface of the land are also increasing, and the land becomes salinized. After people's continuous exploration of the improvement methods of saline-alkali land, the comprehensive improvement of saline-alkali land can be carried out by planting trees. Afforestation in saline-alkali land can not only be effective Reducing the saline-alkali content of the soil can also adjust the ecological environment where the saline-alkali land is located, and reduce the probability of natural disasters such as wind and sand. In addition, afforestation can effectively reduce the evaporation of water in the saline-alkali soil, keep the soil moist, and gradually make the saline-alkali land sustainable. Other crops, in order to achieve the purpose of comprehensive improvement of saline-alkali land, the existing methods of afforestation on saline-alkali land, such as laying isolation layers to plant trees with foreign soil, because the amount of foreign soil is limited, and the saline-alkali land has not been fundamentally improved, so the growth period of trees is limited , this method is costly and difficult to promote