The hedge of Vetivera zizanioides and Amorpha fruticosa had obviously decreased the upland slope and the yield of corn had gradually gone up after planting Vetivera zizanioides and Amorpha fruticosa.

• 香根草、紫穗槐生物埂降低土壤坡度的作用非常明显；种植香根草、紫穗槐生物埂后，玉米产量呈逐年增加的趋势。