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CONTROLLABILITY OF PHOSPHORUS LOSSES IN SURFACE RUNOFF FROM SLOPING FARMLAND TREATED BY AGRICULTURAL PRACTICES

文献类型： 外文期刊

作者： Zhang, Qingwen 1 ; Chen, Shanghong 1 ; Dong, Yuequn 1 ; Liu, Dinghui 2 ; Yang, Xiaojuan 1 ; Yang, Zhengli 1 ;

作者机构： 1.CAAS, Inst Environm & Sustainable Dev Agr, Agr Clean Watershed Res Grp, 12 Zhongguancun South St, Beijing 100081, Peoples R China

2.Sichuan Acad Agr Sci, Soil & Fertilizer Inst, Chengdu 610066, Sichuan, Peoples R China

关键词： soluble phosphorus;sloping cropland;surface runoff;contour culturing;organic matter addition

期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.977； 五年影响因子：5.291 ）

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收录情况： SCI

摘要： Phosphorus (P) loss from arable sloping land due to water erosion causes off-site environment pollution in the Three Gorges area in China. This study aims to estimate the effects of agricultural practices on the reduction of P losses during water erosion processes under natural precipitation conditions: contour culturing with organic matter addition (CT + OM), contour culturing with wheat straw mulching (CT + SM), contour culturing with straw mulching and organic matter addition (CT + OM + SM) and conventional downslope culturing framework as a control (CK). Results demonstrated that CT + OM + SM could viably diminish runoff, sediment yields and P losses from arable sloping land. Compared with CK, CT + OM, CT + SM and CT + OM + SM lessened the surface runoff depths by 19%, 34% and 50%, respectively. A high curve number value induced a notable runoff potential from the plot. The surface-runoff-related total P (TP) loads for CK with yearly measures of 1.56 kg ha(-1) were significantly higher than those for CT + OM, CT + SM and CT + OM + SM at 1.07, 0.77 and 0.51 kg ha(-1) (p < 0.05), respectively. With all things considered, the particulate P losses represented a significant division of TP losses, adding up to almost 80% in 2014 and 79% in 2015. The outcomes demonstrated that surface protection and organic matter addition are two of the greatest agricultural protection practices that lessen P losses in the surface runoff from sloping farmland by water erosion. Copyright (C) 2017 John Wiley & Sons, Ltd.

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[1]Combined effects of runoff and soil erodibility on available nitrogen losses from sloping farmland affected by agricultural practices. Cheng, Shanghong,Huang, Xinjun,Liu, Dinghui,Cheng, Shanghong.

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