Method for sand-barrier establishment through shrub surrounding and grass planting on sandy grassland

Abstract

The invention relates to the technical field of desertification control, in particular to a method for sand-barrier establishment through shrub surrounding and grass planting on sandy grassland. The method has a good desertification control effect and comprises the steps of S1, building multiple shrub islands on flowing, semi-flowing and fixed sandy land areas of the sandy grassland; S2, planting multiple grass belts around the rhizosphere of each shrub island according to required mixed sowing grass seeds and proportion, wherein grass belts contain annual herbs and perennial herbs; S3, conducting fertilization in the shrub islands and grass band sand-barriers. By the adoption of the method, sandy soil moisture in the shrub islands can be maintained by means of the grass belts, and organic matter can be increased; three-dimensional space layers are formed by shrubs and the grass belts, and nutrients and luminous energy in space can be sufficiently utilized; meanwhile, the variety and amount of sandy grassland litter are increased, shrub and grass litter is spread on the sandy land to prevent sand from being blown and retain rainwater, rainwater infiltration rate is increased, runoff is controlled, soil erosion is reduced, and desertification control effect is good.

Description

technical field [0001] The invention relates to the technical field of sand control, in particular to a method for building grass and sand barriers around deserted grasslands. Background technique [0002] Desertification is caused by unreasonable human activities acting on the fragile ecological environment. It is manifested in the decline of land productivity, the loss of land resource functions, and land degradation that presents a desertified landscape. As one of the countries with large desert area, wide distribution and serious desertification hazards in the world, the rate of desertification in my country is accelerating and showing a trend of expansion. Therefore, how to effectively prevent grassland desertification is an urgent problem to be solved. In the work of sandy land control, vegetation sand barrier is an economical and effective technical measure without secondary pollution in the control of land desertification and land degradation. It is the main means t...

AI Technical Summary

Problems solved by technology

[0003] At present, the main sand barriers of shrubs and grasses are mainly constructed of shrubs and grass belts to form windbreak belts, which need to grow for a long time, and the survival rate of pastures is low.

The main reason is that simply planting shrub forest belts, the plants in the seedling stage are low, the seedlings are weak, and the survival rate after transplanting is low; the water and fertilizer conditions required for the growth of shrub seedlings are harsh, and it is difficult to form effective sand-fixing belts in a short period of time; the shifting sand in the sandy land shifting dune area Large amount, easy to bury or push down the forest belt, it takes a long time and multiple planting and repairs to form an effective sand-fixing belt

It is not easy to build a stable ecosystem in the shrub-grass belt, and cannot form an effective microclimate community structure; therefore, the existing sand-fixing greening and planting technology for windbreaks and sand-fixation will take a long time to form a sand-fixing belt, with poor stability and poor sand control effect

Images