Thirteen runoff plots were set up on the slope cropland of Karst plateau mountain to probe into 10 different species hedgerow′s effect of flow and sediment reduction and its silt by surveying the surface runoff of 10 different species hedgerow under the condition of natural rainfall.The results show that Lolium spp and Trifolium repens L don′t have intercepting function, other hedgerows have significant benefits of flow and sediment reduction which vary in each hedgerow with significant variation.After the hedgerow′s being field planting for 2 a, the intercepting effect of Rosa roxburghii Tratt is the best and its relative intercepting rate is 88%, that of Lonicerea Japonicae is 86%.Corylusheterophylla Fisch hedgerow′s sediment reduction effect is the best and its relative intercepting rate is 98%, that of Rosa roxburghii Tratt is 96%, and Lolium spp and Trifolium repens L hedgerow′s intercepting effects are weaker, the rates are 39% and 38% respectively.With the extension of hedgerow′s planting-life, the effect of different species hedgerow on flow and sediment reduction shows a trend of increase.Rosa roxburghii Tratt and Corylusheterophylla Fisch, with the best effect of flow and sediment reduction, are the optimal hedgerow species on prevention and control of soil erosion in Karst plateau mountain.The benefits of different species of plant hedge in demonstration are good, but the policy still needs to improve.%在喀斯特高原山地坡耕地设置13个径流小区,通过监测10种不同物种植物篱种植小区在天然降雨条件下产生的地表径流、泥沙情况,探讨了10种不同物种植物篱的截流拦沙效应.结果表明:除黑麦草、白三叶草本植物篱不具截流功能外,其他植物篱均具显著的截流拦沙效应,且各植物篱之间的截流拦沙效应存在显著性差异,其中植物篱定植近2 a后,刺梨植物篱截流效应最佳,相对拦截率为88%,金银花次之,为86%;榛子植物篱拦沙效应最佳,相对拦沙率为98%,刺梨次之,为96%,黑麦草、白三叶相对较差,分别为39%和38%;随植物篱种植年限延长,不同物种植物篱截流拦沙效应呈增长趋势,刺梨、榛子截流拦沙效果最好,是当地防治水土流失最优的植物篱物种;示范区不同物种植物篱总体示范效果良好,但相关政策仍需完善.
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