Method for controlling grassland wind erosion desertification

Abstract

The invention relates to a method for controlling grassland wind erosion desertification. According to the method, shrubs and herbaceous plants are sown in a mixed mode for forestation, and then tree seedling planting is conducted for forestation. Specifically, the method comprises the following steps that (1) the shrubs and the herbaceous plants are sown in the mixed mode, wherein land preparing, sowing and soil covering are conducted, according to the sowing mode, hedysarum laeve maxim and oat are sown in a mixed mode, and according to the mixed sowing mode, the mode of 1 m*0.80 m or 1 m*1 m is adopted at the edge perpendicular to the prevailing wind direction, and the mode of 1.5 m*1.5 m or 2 m*2 m is adopted in a flat region; (2) tree planting is conducted for forestation, wherein the adopted space between rows is 4 m*4 m or 6 m*6 m or 8 m*8 m, the specification is 40*40 or 50 cm*50 cm, and the seedlings are planted for forestation. According to the method, the root systems of trees are developed, the fruit bearing amount is large, the natural renewability is strong, and the emergence rate of seeds is higher than 90%. A large area of pinus sylvestris sand-fixation forest is built, and positive effects are achieved on controlling land desertification and improving the local ecological environment.

Description

technical field [0001] The invention relates to a method for controlling desertification, in particular to a method for controlling grassland wind erosion and desertification. Background technique [0002] Grassland desertification is an extreme manifestation of grassland ecosystem damage, and it is also one of the main manifestations of grassland soil ecosystem degradation. According to the definition given by the national standard GB19377-2003: Grassland desertification refers to the grassland with sandy surface environment in different climate zones affected by factors such as wind erosion, water erosion, drought, rodent pests, and artificial improper economic activities, such as long-term overloading and overgrazing, Unreasonable reclamation and excessive firewood mining, excessive digging of medicinal materials, etc., have caused varying degrees of damage to natural grasslands, soil erosion, soil coarsening and desertification, decreased soil organic matter content, los...

AI Technical Summary

Problems solved by technology

Therefore, resulting in the slow growth of S. argentina and low seedling emergence rate, it is impossible to complete the seeding. In the second year, almost no A. arbusae seedlings can be seen, so there is no shelter effect, which affects the growth of the target tree species

At the same time, due to the setting of mechanical sand barriers, the cost of afforestation is greatly increased