关键词: 土壤吹蚀, 铺压密度, 铺压方式, 吹蚀速率

Abstract: The rates of soil deflation in different gravel spread density (G_d) and gravel spread pattern were simulated and determined in the wind tunnel of Desert Research, Chinese Academy of Sciences. It was concluded that: ① soil deflation rates, at any certion wind velocity, decreased exponentially with the increase of G_d; ② the effects of gravel mulch restraining soil deflation under 5-experinced gravel spread patters, at a certain G_d, follow a order of Parallel strip spread < Nest spread < Oblique strip spread < Vertical strip spread < Random spread. It was Random spread pattern that has the highest anti deflation effect, and when G_d are 20%, 50%, 75% and 100% the effects are 34.36%, 69.41%, 82.94% and 92.91% of bare soil respectively. The results had revealed the positive ecology function of gravel gobi extensively distributed in desert area.

Key words: Soil deflation, Gravel spread density, Gravel spread pattern, Deflation rate