• ISSN 1008-505X
  • CN 11-3996/S
傅涛, 倪九派, 魏朝富, 谢德体. 不同雨强和坡度条件下紫色土养分流失规律研究[J]. 植物营养与肥料学报, 2003, 9(1): 71-74. DOI: 10.11674/zwyf.2003.0113
引用本文: 傅涛, 倪九派, 魏朝富, 谢德体. 不同雨强和坡度条件下紫色土养分流失规律研究[J]. 植物营养与肥料学报, 2003, 9(1): 71-74. DOI: 10.11674/zwyf.2003.0113
FU Tao, NI Jiupai, WEI Chaofu, XIE Deti. Research on the nutrient loss from purple soil under differentrainfall intensities and slopes[J]. Journal of Plant Nutrition and Fertilizers, 2003, 9(1): 71-74. DOI: 10.11674/zwyf.2003.0113
Citation: FU Tao, NI Jiupai, WEI Chaofu, XIE Deti. Research on the nutrient loss from purple soil under differentrainfall intensities and slopes[J]. Journal of Plant Nutrition and Fertilizers, 2003, 9(1): 71-74. DOI: 10.11674/zwyf.2003.0113

不同雨强和坡度条件下紫色土养分流失规律研究

Research on the nutrient loss from purple soil under differentrainfall intensities and slopes

  • 摘要: 采用室内模拟降雨装置,研究了三峡库区紫色土在不同雨强和坡度条件下的养分流失规律。结果表明,紫色土坡面流失养分主要由径流和泥沙携带,其中径流养分含量与雨强和坡度无关,但与产流过程一致。泥沙中养分含量与雨强无关,但随坡度增加而降低;泥沙养分含量与产沙量过程无关,但其流失量与产沙量过程一致。泥沙中各养分含量略大于降雨前表土养分含量,远大于径流养分含量,但由于径流中以速效养分为主,故径流携带的养分流失量不容忽视。

     

    Abstract: With simulated rainfall equipment, the pattern of soil nutrients from purple soil under different rainfall intensities and slopes was studied Results showed that the majority of soil nutrients was removed with runoff and sediment The content of nutrients in the runoff was not interrelated with rainfall intensity and slope, but with the amount of runoff The content of nutrients in the sediment was not interrelated with the rainfall intensities There was negative correlation between the slope and the content of nutrients in the sediment The nutrient loss was in direct proportion to the amount of sediment and runoff The content of nutrients in the sediment was slightly higher than that in the surface soil before rainfall, but exceedingly higher than that in the runoff Because the nutrients in the runoff mainly consisted of available ones, the nutrient loss via runoff could not be neglected

     

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