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

被引：22

作者：

Ao, Chang ^{[1
]}

Yang, Peiling ^{[1
]}

Ren, Shumei ^{[1
]}

Xing, Weimin ^{[1
]}

Li, Xu ^{[2
]}

Feng, Xuewu ^{[2
]}

机构：

[1] China Agr Univ, Coll Water Conservancy & Civil Engn, Beijing 100083, Peoples R China

[2] Inst Water Resources, Hohhot 010020, Inner Mongolia, Peoples R China

来源：

ENVIRONMENTAL EARTH SCIENCES | 2016年 / 75卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Polyacrylamide; Runoff; Soil loss; Nitrogen loss; Slope; PHOSPHORUS LOSSES; NUTRIENT LOSSES; SURFACE RUNOFF; WATER-QUALITY; DRY PAM; SOIL; IRRIGATION; GENERATION;

D O I：

10.1007/s12665-015-5110-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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/m(2)), rainfall intensities (30, 60 and 90 mm/h) and the applied positions (top, middle and bottom with application rate of 2 g/m(2)) on runoff, soil and total nitrogen (TN) losses at loess slope. Overall, the results showed that PAM application rate of 1-2 g/m(2) reduced runoff compared with no application of PAM on runoff. PAM application rate of 4 g/m(2) reduced sediment losses most, but it increased the amount of runoff and TN losses in runoff. The PAM application rate of 2 g/m(2) 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/m(2) on the middle slope was the most feasible and beneficial mode for PAM application in the loess region.

引用

页数：10

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