Analysis on Vegetation Restoration and Drifting-Sand Control on Sandy Degraded Grassland in Yanchi

摘要

In this paper, by investigating soil , field vegetation, and surface wind erosion status, combining in2 door analysis, the effect of vegetation recovery on sandy degraded grassland in Yanchi is studied. The results show that: after the process of protective growth, grazing rest and reseeding, the plant species and vegetation coverage are increased, and biomasses are enhanced about 66. 3214, at the same time, the effect of the measure of combining protective growth, grazing rest and reseeding is better than that of single protective growth and grazing rest, the formers biomass is 1. 54 times more than the latter. With the fixing of drifting-sand and the recovering of vegetation in demonstration area, the content s of physical clay minerals, organic matter, total N. Available P and available K are all increased compared with those on drifting-sand. The thickness of wind erosion in drifting-sand cont rol area is reduced, and the thickness is different in different vegetation recovering area, in which Artemisia sphaerocephala planting area suffers slight wind erosion; Caragana korshinskii forest present s slightly accumulating status, the accumulating thickness in Tamarix and Salix psammophila forest is the most.