喀斯特高原山地不同植物篱配置模式下的减流减沙效益对比

以朝营小流域作为研究区,利用标准径流小区法,研究不同植物篱配置模式下的减流减沙效益,径流小区包括:黑麦草、黑麦草+白三叶、白三叶、鸭茅+榛子、鸭茅+金荞麦+木通等5种植物篱模式,并与对照小区玉米地进行对比.结果表明:(1)在喀斯特高原山地各植物篱措施均具有较好的减流减沙效果,相比之下鸭茅+金荞麦+木通三行植物组合模式效果最显著;(2)各小区径流及泥沙流失量由大到小依次为:白三叶、黑麦草、鸭茅+榛子、黑麦草+白三叶、鸭茅+金荞麦+木通三行植物篱;(3)与对照组相比,组合植物篱模式(鸭茅+金荞麦+木通,黑麦草+白三叶,鸭茅+榛子)减流减沙效果优于单一植物篱模式(黑麦草,白三叶).

Comparison of Benefits of Runoff and Sediment Reduction of Different Biological Measures for Soil and Water Conservation

Based on the Chaoying small watershed,the efficiency of runoff and sediment reduction on different mode of hedgerow was studied using the standard runoff plots method.The runoff plots include:ryegrass,the combination of ryegrass and trifolium repens,trifolium repens,the combination of orchardgrass and filbert,the combination of orchardgrass and fagopyrum dibotrys and akebiaquinata,and five runoff plots were contrasted with cornfield of runoff plots in order to revel the characteristics of runoff and sediment reduction under the hedgerow in stony desertification region.The results were showed:(1)Every hedgerow had a positive efficient on runoff and sediment reduction in karst plateau area,but the combination of orchardgrass and fagopyrum dibotrys and akebiaquinata had the best effect on runoff and sediment reduction;(2)The order of runoff and sediment reduction amount of different plots from big to small was trifolium repens,ryegrass,the combination of orchardgrass and filbert,the combination of ryegrass and trifolium repens,the combination of orchardgrass andfagopyrum dibotrys and akebiaquinata;(3)Compared to the control,the combined mode hedgerow(the combination of orchardgrass and fagopyrum dibotrys and akebiaquinata,the combination of orchardgrass and filbert,the combination of ryegrass and trifolium repens)were significantly better than single mode hedgerow(ryegrass,trifolium repens)on benefiting in runoff and sediment reduction.