Reducing soil erosion and nutrient loss on sloping land under crop-mulberry management system

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• 作者：Fangling Fan ; Deti Xie ; Chaofu Wei…
• 关键词：Purple soil ; Sloping crop ; mulberry land ; Surface runoff ; Soil loss ; Soil nutrients ; Soil management practice
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：18
• 页码：14067-14077
• 全文大小：974 KB
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• 作者单位：Fangling Fan (1) (2)
  Deti Xie (1) (2)
  Chaofu Wei (1) (2)
  Jiupai Ni (1) (2)
  John Yang (1) (3)
  Zhenya Tang (1) (2)
  Chuan Zhou (1) (2)
  
  1. Colleague of Resources and Environment, Southwest University, Chongqing, China
  2. Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in Three Gorges Reservoir Area, Chongqing, China
  3. Department of Agriculture and Environmental Science, Lincoln University of Missouri, Jefferson City, MO, USA
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Sloping croplands could result in soil erosion, which leads to non-point source pollution of the aquatic system in the Three Gorges Reservoir Region. Mulberry, a commonly grown cash plant in the region, is traditionally planted in contour hedgerows as an effective management practice to control soil erosion and non-point source pollution. In this field study, surface runoff and soil N and P loss on sloping land under crop-mulberry management were investigated. The experiments consisted of six crop-mulberry treatments: Control (no mulberry hedgerow with mustard-corn rotation); T1 (two-row contour mulberry with mustard-corn rotation); T2 (three-row contour mulberry with mustard-corn rotation); T3 (border mulberry and one-row contour mulberry with mustard-corn rotation); T4 (border mulberry with mustard-corn rotation); T5 (two-row longitudinal mulberry with mustard). The results indicated that crop-mulberry systems could effectively reduce surface runoff and soil and nutrient loss from arable slope land. Surface runoff from T1 (342.13 m3 hm?), T2 (260.6 m3 hm?), T3 (113.13 m3 hm?), T4 (114 m3 hm?), and T5 (129 m3 hm?) was reduced by 15.4, 35.6, 72.0, 71.8, and 68.1 %, respectively, while soil loss from T1 (0.21 t hm?), T2 (0.13 t hm?), T3 (0.08 t hm?), T4 (0.11 t hm?), and T5 (0.12 t hm?) was reduced by 52.3, 70.5, 81.8, 75.0, and 72.7 %, respectively, as compared with the control. Crop-mulberry ecosystem would also elevate soil N by 22.3 % and soil P by 57.4 %, and soil nutrient status was contour-line dependent. Keywords Purple soil Sloping crop-mulberry land Surface runoff Soil loss Soil nutrients Soil management practice