黄土高塬沟壑区两种牧草蓄水保土效果试验

Tests on Effect of Two Kinds of Grasses for Soil and Water Conservation in Gullied Loess Plateau

为了分析黄土高塬沟壑区牧草对蓄水保土的作用,在南小河沟范家山设置了牧场草区、金皇后苜蓿区和对比区,并进行了径流试验,观测了各小区的径流量、含沙量、冲刷量、土壤含水率和耗水强度等。结果表明:牧场草区、金皇后苜蓿区的径流量、含沙量、冲刷量均比对比区小,牧场草区、金皇后苜蓿区比对比区径流含沙量分别减少36.09%5、5.65%,牧场草区、金皇后苜蓿区冲刷量比对比区分别减少53.32%6、9.93%。牧场草区、金皇后苜蓿区耗水强度与对比区相同,但土壤含水率比对比区大。

In order analysis gullied Loess Plateau area of forage for water and soil conservation,in Nanxiaohegou Fan Jiashan set up a Bromus biebersteinii area,Medicago sativa L areas and comparison areas,and runoff experiments and observed runoff of each plot,sediment,erosion,soil moisture and pasture water intensity.The results showed that： the district of Bromus biebersteinii,alfalfa area of Medicago sativa L runoff,sediment,erosion volume is smaller than the comparison area,Bromus biebersteinii area,the Medicago sativa L area than the comparison district sediment are reduced by 36.09% and 55.65% respectively,Bromus biebersteinii area,the Medicago sativa L area erosion than the comparison area are reduced by 53.32% and 69.93% respectively.Comparing the water consumption intensity of pasture grass area,the Medicago sativa L is the same as the check area,but the soil moisture content is greater than that of in the check area.