Saline-Alkali Land Management Methods in Desert Areas

Abstract

The invention discloses a desert area saline and alkaline land management method. The method comprises the steps of salt washing, pipe burying, ridging and ditching, soil conditioner applying and salt-tolerant plant planting. The method has the advantages that most saline materials in planting area soil are washed away through flood irrigation, so that crops are not likely to die in the initial stage of planting, due to the fact that the portion blow the planting area soil obtained after salt washing is paved with a salt-resistant waterproof layer, the phenomenon that salt in underlying soil is evaporated along with moisture to return to upper salt-washed soil in the season having less rainfall can be effectively avoided, after rainwater is collected and stored through a rainwater collection device, irrigation is conducted through drip irrigation pipes, it is guaranteed that the soil obtained after salt washing reserves certain moisture and the planted crops do not die due to dryout, due to the fact that the drip irrigation pipes are just located on the lower portions of furrows planted with crops, water spilled from the drip irrigation pipes can be directly absorbed by the crops, evaporation waste of the moisture is avoided, the salt accumulation effect of the planting area can be achieved through ridges, and the phenomenon that the salt is collected in the furrows so that the crops cannot grow is avoided.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land treatment, in particular to a land treatment method for saline-alkali land in desert areas. Background technique [0002] Saline-alkali land refers to a type of land where excessive salt accumulation even affects the normal growth of crops. The area of ​​saline-alkali land in the world is 954.38 million hectares, while my country accounts for 99.13 million hectares. The formation of saline-alkali land is often due to low precipitation and evaporation. Large, the salt dissolved in water is easy to accumulate on the soil surface, but the soil in these areas does not always accumulate a large amount of salt. "Desalination", the surface water evaporates strongly in spring, and the salt in the groundwater accumulates on the soil surface as the capillary water rises, resulting in "returning salt". [0003] In recent years, with the interference of human economic and social activities and the i...

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Problems solved by technology

[0003] In recent years, with the interference of human economic and social activities and the intensification of natural disasters, the ecological environment in the desert Gobi region of Northwest China has continued to deteriorate. The dry climate, poor soil and heavy salinity have greatly reduced the vegetation coverage. A large-scale afforestation project has been carried out in the arid desert heavy saline-alkaline area. In order to improve the survival rate of the planting plants, the salt will be washed according to the principle of "desalination" of the soil itself before planting plants. However, due to the low rainfall in these areas, After washing the salt, the surface of the soil is easy to gather a large amount of salt again, causing the survival rate of the plant species to be too low. This will not only fail to improve the local ecological environment, but also waste a lot of human and financial resources

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