Properties of Runoff and Sediment and Nutrient Loss on Five Types of Utilization Patterns of Slope Land in High Precipitation Area of Western China

WU Wei-guo; HU Ting-xing; TANG Tian-yun; SONG Xue-gui; ZHOU Chao-bin

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Properties of Runoff and Sediment and Nutrient Loss on Five Types of Utilization Patterns of Slope Land in High Precipitation Area of Western China

更新时间：2024-11-07

- Properties of Runoff and Sediment and Nutrient Loss on Five Types of Utilization Patterns of Slope Land in High Precipitation Area of Western China
- Vol. 21, Issue 4, Pages: 38-42(2007)
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  CLC： S15
- Published：2007
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WU Wei-guo, HU Ting-xing, TANG Tian-yun, et al. Properties of Runoff and Sediment and Nutrient Loss on Five Types of Utilization Patterns of Slope Land in High Precipitation Area of Western China[J]. 2007, 21(4): 38-42.
DOI：

WU Wei-guo, HU Ting-xing, TANG Tian-yun, et al. Properties of Runoff and Sediment and Nutrient Loss on Five Types of Utilization Patterns of Slope Land in High Precipitation Area of Western China[J]. 2007, 21(4): 38-42. DOI：

摘要

选择5种坡地利用方式

分别是裸地、农耕地(玉米)、荒草地、巨桉林地Ⅰ与巨桉林地Ⅱ

建立人工径流小区

对2006年6～11月各小区产流产沙及养分流失进行对比研究.结果表明:(1)5种坡地利用方式产流产沙差异显著(P＜0.05)

径流深依次是裸地(250.9 mm)＞农耕地(232.9 mm)＞荒草地(175.4 mm)＞巨桉林地Ⅰ(170.5 mm)＞巨桉林地Ⅱ(141.3 mm);产沙量大小依次为:农耕地(313.63 t/km2)＞裸地(176.80 t/km2)＞荒草地(94.45 t/km2)＞巨桉林地Ⅰ(90.58 t/km2)＞巨桉林地Ⅱ(36.37 t/km2).(2)5种坡地利用方式养分流失差异显著(P＜0.05)

其流失量大小顺序均为钾素＞磷素＞氮素.其中

氮素与磷素流失以水溶态为主

平均为96.16%与69.45%;钾素以颗粒态(与泥沙结合态)为主

平均为74.93%.(3)不同坡地产流产沙主要影响因素不同

裸地与农耕地受降雨影响较大

而荒草地与巨桉林地受人为干扰因素较大.(4)调整农事活动、改善经营措施与减少人为干扰对防止坡地产流产沙以及养分流失具有重要作用.

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