【摘要】 以传统种植模式为对照,对桑基植物篱模式拦蓄径流、泥沙及改善土壤抗蚀性的效应进行了较为系统的研究。结果表明:桑基植物篱模式下土壤抗蚀性有较大程度的提高,表层土团聚度和团聚状况分别较传统种植模式提高25 2%和50 6%,而分散率则下降了3 7%,水稳性指数为传统顺坡种植的1 9倍,前10min水稳性团聚体破坏率仅为传统种植模式的57 2%。同时,桑基植物篱的应用能有效地减少紫色土坡地的水土流失,尤以侵蚀量和径流含沙量的减少和降低更为明显,与传统种植模式相比,径流量和径流系数减少或降低了10 34%～20 00%,侵蚀量减少了55 23%～67 84%,径流含沙量减小了48 60%～59 80%;在大雨强时桑基植物篱对减少养分的流失总量和富集比效果也相当显著。该技术的应用可有效地保证紫色土坡地土壤对降雨的充分入渗,减少面源污染,保持坡耕地的土地生产力。更多还原

【Abstract】 In control of traditional cropping pattern,this paper systematically studied three effects of mulberry hedgerow intercropping including collecting runoff,sediment and improving soil anti-erodibility.The results are as follows:Under mulberry hedgerow intercropping,soil anti-erodibility was enhanced to a larger extent,the aggregate degree and the aggregate condition of top layer soil respectively increased by 25.2% and 50.6% than traditional cropping pattern,while dispersion rate decreased by 3.7%, water stable index is 1.9 times as much as traditional up and down slop cultivation,percentage of water stable aggregate disruption is only 57.2% of the level of traditional cropping pattern.Besides, the application of mulberry hedgerow intercropping could effectively reduce soil and water loss of purple soil sloping farmland,especially,the decreasing and dropping of soil erosion amount and silt content of runoff are more evident,in contrast to traditional cropping pattern,runoff amount and runoff coefficient cut down by 10.34%～20.00%,soil erosion amount decreased by 55.23%～ 67.84%,silt content of runoff decreased by 48.60%～59.80%; mulberry hedgerow intercropping could decrease nutrient loss total amount and accumulative ratio when the rain is heavy,the effect is also quite remarkable.The application of this technology could effectively assure that rainfall abundantly infiltrate soil of purple soil slopping farmland,decrease non-point pollution and maintain productivity of land on slopping farmland.更多还原