中文摘要：

【目的】了解南方地区红壤地氮磷素养分的垂直迁移规律,为提高肥料利用率和减少面源污染提供理论依据。【方法】选取松华坝水源保护区典型流域迤者小流域为试验区,对灌草林、坡耕地、荒地3种不同土地利用类型不同坡位处土壤剖面土壤养分各指标进行测定,并分析其相关性。【结果】对于同一土地利用类型而言土壤各养分指标的含量均为：坡下部〉坡中部〉坡上部;对于3种土地利用类型,土壤全氮、全磷含量均为：灌草林〉坡耕地〉荒地,土壤碱解氮含量为：坡耕地〉灌草林〉荒地,土壤速效磷含量为：坡耕地〉灌草林〉荒地,有机质含量为：荒地〉灌草林〉坡耕地;土地利用类型对土壤养分影响程度为：全磷〉全氮〉有机质〉碱解氮〉速效磷;土壤全氮含量与坡位呈显著线性相关,碱解氮含量与坡位呈极显著线性相关;土壤速效磷、土壤全氮、土壤碱解氮和土壤有机质含量与土层深度呈极显著线性相关;土壤养分之间有相互的影响,土壤有机质与速效磷和碱解氮之间呈显著和较显著的影响。【结论】南方红壤坡地中氮磷素养分的垂直运移规律为同一土地利用类型土壤各养分含量,整体随坡位的下降而增大,随着土层深度的增加而减少;不同土地利用类型对土壤全量养分（全氮、全磷）有显著影响。

英文摘要：

【Obejective】The vertical transfer law of nitrogen and phosphorus in red soil in South China was studied to provide theoretical support for improving the utilization rate of fertilizer and reducing non-point source pollu-tion. 【Method】Taking a small watershed in Songhuaba water source area of Yunnan as a test area, the soil nutrient indexes in 3 kinds of different land use types（woodland, farmland and wasteland） and slope position profile were determined, and their correlation were analyzed. 【Result】 For the same type of land use,soil nutrients was the lower slope〉the middle slope〉the top slope. For 3 kinds of different land use types, the order of the soil total nitrogen and total phosphorus contents was woodland 〉farmland slope 〉wasteland. The order of the soil alkaline hydrolysis nitrogen content was farmland slope〉woodland〉wasteland. The order of soil available phosphorus content was farmland slope 〉woodland〉wasteland. The order of soil organic matter content was wasteland〉woodland〉farmland slope.. The order of impacts of land use types on soil nutrients was TP 〉TN 〉OM 〉AN 〉AP. There was obvious linear correlation between soil total nitrogen content and slope. There was a very significant linear correlation between alkaline hydrolysis nitrogen content and slope. There was a very significant linear correlation between the soil AP, TN, AN, OM and soil depth. All the soil nutrients had mutual influence, and there were obvious and more significant effects between soil organic matter and available phosphorus or available nitrogen. 【Conclusion】The law of vertical transfer of nitrogen and phosphorus in red soil in South China is that for the same type of land use, the soil nutrient content increases with the decline of slope position and the soil nutrient content decreases with the increase of soil depth. There is obvious effect between the different land use types and the soil total nutrients（total nitrogen and total phosphorus）.