干旱区生态环境知识资源中心(Arid): Best management practices for agricultural non-point source pollution in a small watershed based on the AnnAGNPS model

Arid

DOI	10.1111/sum.12535
	Best management practices for agricultural non-point source pollution in a small watershed based on the AnnAGNPS model
	Zhang, Tong 1,2,3; Yang, Yuheng 4; Ni, Jiupai 1,3; Xie, Deti 1,3
通讯作者	Xie, Deti
来源期刊	SOIL USE AND MANAGEMENT
ISSN	0266-0032
EISSN	1475-2743
出版年	2020
卷号	36 期号:1 页码:45-57
英文摘要	Best management practices (BMPs) are implemented to reduce non-point source pollution (NPSP) worldwide. In this study, the AnnAGNPS model was adapted and used to evaluate the effectiveness of BMPs for NPSP control in the Three Gorges Reservoir Area in China. Through field investigation and experimental observation, the AnnAGNPS model database was constructed. The model best simulated run-off and its simulation of total nitrogen (TN) was better than for total phosphorus (TP). Simulation of the spatial distribution of different pollutant loads showed that the annual outputs of TN and TP per unit area were the highest, with an average of 63 and 6 kg hm(-2) per year, respectively. An optimal scenario was developed based on adjustments to the existing land structure which were most effective at reducing N and P loads. The reduction rates of TN and TP loads were 54% and 63%, respectively, while the reduction rates of dissolved and particulate N and P loads were between 47% and 68%. After 27% of arid slope fields were converted into terraces in the study area, the modelled particulate N and P outputs were reduced by 44% and 46%, respectively, showing that terracing sloping land could be effective at reducing particulate N and P losses. These findings indicated that slope-shifting technology is the most important method for NPSP control in the TGRA. In addition, reduced fertilizer use and conservation tillage measures should also be adopted to effectively reduce TN and TP losses.
英文关键词	BMP scenarios conservation tillage measures optimization of land-use structure terracing sloping land Three Gorges Reservoir Area
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000494173900001
WOS关键词	EROSION ; TOOL
WOS类目	Soil Science
WOS研究方向	Agriculture
EI主题词	2019-10-23
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310337
作者单位	1.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China; 2.Southwest Univ, Interdisciplinary Res Ctr Agr Green Dev Yangtze R, Chongqing, Peoples R China; 3.Minist Agr, Key Lab Arable Land Conservat Southwest China, Chongqing, Peoples R China; 4.Southwest Univ, Coll Plant Protect, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tong,Yang, Yuheng,Ni, Jiupai,et al. Best management practices for agricultural non-point source pollution in a small watershed based on the AnnAGNPS model[J],2020,36(1):45-57.
APA	Zhang, Tong,Yang, Yuheng,Ni, Jiupai,&Xie, Deti.(2020).Best management practices for agricultural non-point source pollution in a small watershed based on the AnnAGNPS model.SOIL USE AND MANAGEMENT,36(1),45-57.
MLA	Zhang, Tong,et al."Best management practices for agricultural non-point source pollution in a small watershed based on the AnnAGNPS model".SOIL USE AND MANAGEMENT 36.1(2020):45-57.