皇草保持水土的效益研究

通过对皇草的土壤性状及其水土保持效益进行研究，结果表明：皇草可有效增加植被覆盖度，减轻雨水对地表的溅蚀作用，减少土壤容重，增强土壤的蓄水保水能力和土地生长力。采用2500株／667m^2的处理，植被覆盖度恢复达95％以上只需70d。当年鲜草产量达134331．0kg／hm^2，与对照相比，地表径流减少52．73％，土壤侵蚀量减少70．26％。

Effects of King Grass on Soil and Water Conservation

The cultivation experiment of King grass on slope land was conducted to study its efficiency for controlling water and soil erosion at yao-shuo-qiao village of Dushan county in 2004. The results showed that King grass can effectively increes vegetation coverage, dicrease soil erosion from the land surface, reduce unit volume weight of the soil, raise the capacity of conserving soil andwater on slope land. At the planting density condition of 2 500 plants per 667mz ,only 70 days after sowing, the vegetation rate can reach 95%. The output of fresh grass reaches 134 331 kg per hmz within a year. Comparing with the uncovered plot of the slope land, the surface runoff decreased by 52.73%, the soil erosion amount reduced by 70.26% in the plat of King grass growing.