How to control land desertification

The methods to control land desertification are as follows:

(1) Plant trees and grass. When vegetation coverage reaches more than 30%, soil wind erosion will basically disappear. The measures to control desertification by planting trees and grasses are based on the principle of controlling soil wind erosion. In agricultural areas where desertification is serious, the main method is to return part of the desertified farmland to forestland and grassland to achieve the purpose of restoring desertified land. However, due to the planting of trees and grass on one part of the land in the region, there is no coordination and synchronization with the large increase in the carrying capacity of other parts of the land in the region, or only the planting of trees and grass is considered, without building basic farmland and significantly increasing the unit land. The contradiction between planting trees and grass and the already excessive population pressure has become increasingly fierce.

(2) Fence enclosure. There is excessive livestock pressure in grassland areas, and overgrazing has caused land desertification. The management method usually adopts "enclosure", that is, dividing the pasture into several small areas, so that the enclosed grassland can recover naturally due to the disappearance of livestock pressure.

Land desertification refers to land degradation, also called "desertification". The 1992 United Nations Conference on Environment and Development defined the concept of desertification as follows: "Desertification is the occurrence of land degradation in arid, semi-arid and sub-humid areas with drought disasters due to factors such as climate change and irrational human economic activities. Degenerate.