中文摘要：

超营养作用在三座峡水库作为主要环境问题之一被认出。轮廓灌木篱墙在这个区域被用作主要土壤和水保存措施。因此，二年的研究被进行调查从在这个区域泼出农田在滋养的损失上杂种的轮廓灌木篱墙的效果。四个处理被使用：(1 ) 玉米 + 大豆，(2 ) 玉米，(3 ) 玉米 + 苜蓿，并且(4 ) 玉米 + Hemerocallis citrina Baroni。结果显示在控制治疗(玉米) 的滋养的损失是严肃的，全部的氮(2245.8 mg ) 的特别平均损失流动和在一个典型降雨事件的全部的磷酸盐(2434.2 mg ) 。然而，由在有杂种的轮廓灌木篱墙的另外的三个处理的流量的滋养的损失显示出重要减小。与控制处理相比，分别地，在苜蓿和 Hemerocallis citrina Baroni 的全部的氮损失在 80.9% 和 85.0% 减少了，在二个处理的全部的磷损失分别地在 91.2% 和 92.5% 减少了。因此，滋养的损失能被在三个峡区域使用轮廓灌木篱墙减少，这被结束。减少流量体积和沉积损失是杂种减少滋养的损失的轮廓灌木篱墙的主要机制。

英文摘要：

Eutrophication is recognized as one of the major environmental problems in the Three Gorges Reservoir.Contour hedgerows have been used as a major soil and water conservation measure in this area.Accordingly,a two-year study was conducted to investigate the effects of contour hedgerow intercropping on nutrient loss from sloping farmland in this area.Four treatments were applied：（1） Maize ＋ Soybean,（2） Maize,（3） Maize ＋ Alfalfa,and（4） Maize ＋ Hemerocallis citrina Baroni.Results indicated that nutrient loss in the control treatment（Maize） was serious,especially the average loss flux of total nitrogen（2245.8 mg） and total phosphate（2434.2 mg） in a typical rainfall event.However,the nutrient losses by runoff in the other three treatments with contour hedgerow intercropping showed significant reduction.Compared with the control treatment,the total nitrogen loss in the Alfalfa and Hemerocallis citrina Baroni decreased by 80.9% and 85.0%,respectively,and the total phosphorus loss in the two treatments decreased by 91.2% and 92.5%,respectively.Therefore,it is concluded that nutrient losses could be reduced by using contour hedgerows in the Three Gorges Region.Reducing runoff volume and sediment loss was the main mechanisms of contour hedgerow intercropping to reduce nutrient loss.