Efficacy of granular polyacrylamide on runoff, erosion and nitrogen loss at loess slope under rainfall simulation

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• 作者：Chang Ao ; Peiling Yang ; Shumei Ren ; Weimin Xing ; Xu Li…
• 关键词：Polyacrylamide ; Runoff ; Soil loss ; Nitrogen loss ; Slope
• 刊名：Environmental Earth Sciences
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：75
• 期：6
• 全文大小：1,272 KB
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• 作者单位：Chang Ao (1)
  Peiling Yang (1)
  Shumei Ren (1)
  Weimin Xing (1)
  Xu Li (2)
  Xuewu Feng (2)
  
  1. College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing, 100083, China
  2. Institute of Water Resources, Huhhot, 010020, Inner Mongolia, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

The chemical control of runoff, sediment and nutrient losses is one of the main measures of soil and water conservation and ecological improvement. A simulation experiment was conducted to investigate the effects of polyacrylamide (PAM) application rates (0, 0.5, 1, 2 and 4 g/m2), rainfall intensities (30, 60 and 90 mm/h) and the applied positions (top, middle and bottom with application rate of 2 g/m2) on runoff, soil and total nitrogen (TN) losses at loess slope. Overall, the results showed that PAM application rate of 1–2 g/m2 reduced runoff compared with no application of PAM on runoff. PAM application rate of 4 g/m2 reduced sediment losses most, but it increased the amount of runoff and TN losses in runoff. The PAM application rate of 2 g/m2 reduced runoff and nitrogen losses significantly. Soil and TN losses in sediment of PAM application position of the middle slope were significantly (p < 0.05) smaller than that of other PAM application positions. Considering the runoff, sediment and TN losses, PAM application rate of 2 g/m2 on the middle slope was the most feasible and beneficial mode for PAM application in the loess region.