水土保持学报2012，Vol.26Issue(4)：23-27,5.
黄土坡面不同植被覆盖度下产流产沙与养分流失规律
Runoff and Sediment Generations and Nutrient Losses Under Different Vegetation Coverage in Loess Slope
摘要
Abstract
Vegetation and precipitation are both the key factors which determine runoff and sediment amount, and nutrient losses. To examine the effects of vegetation cover on sediment erosion and solute transport on hill slopes by alfalfa, the water scouring method was used in a semi-arid region China. The results indicate that loss amounts of runoff, sediment and nutrient were 693.35, 362.51, 324.65, 266.64 L and 16.3, 5.9, 0.16, 0. 091 kg, and 5 852.07, 1 274.51, 397.29, 178.56 mg respectively in vegetation cover ratios of 0%, 33.5 %, 43.2 % and 68.8 %. The power function was used to fit the experimental data of the solute concen- tration in runoff, and fund that the power function might be used to fit the experimental data of the solute concentration in runoff. The mean roughness coefficient might be used to indicate soil erosion. The mean roughness coefficient turned larger because of vegetable cover, which reduced losses of soil and nutrients.关键词
黄土坡地/植被覆盖/土壤侵蚀/养分流失/坡面糙率Key words
loess slope vegetation coverage soil erosion nutrient losses roughness coefficients分类
农业科技引用本文复制引用
王升,王全九,董文财,赵伟..黄土坡面不同植被覆盖度下产流产沙与养分流失规律[J].水土保持学报,2012,26(4):23-27,5.基金项目
国家自然科学基金项目 （）
