Effect of soil conservation measures and slope on runoff, soil, TN, and TP losses from cultivated lands in northern China

doi:10.1016/j.ecolind.2021.107677

	Effect of soil conservation measures and slope on runoff, soil, TN, and TP losses from cultivated lands in northern China
	Fang, Haiyan 1,2
刊名	ECOLOGICAL INDICATORS
	2021-07-01
卷号	126 页码:8
关键词	Runoff plot Soil conservation measure Soil loss TN TP
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2021.107677
通讯作者	Fang, Haiyan(fanghy@igsnrr.ac.cn)
英文摘要	Soil and nutrient loss characteristics in cultivated lands are scarcely identified in northern China that could retard reasonable implementation of soil conservation measures. In the present study, seven-year of water, sediment, and nutrient data in 2014?2020 from five cultivated plots in the Miyun Reservoir, Beijing were used to explore runoff, soil, total nitrogen (TN) and total phosphorous (TP) loss characteristics and their responses to soil conservation measures, slope gradients, and rainfall characteristics. Annual soil loss rate (SLR) decreased from 3025.23 t km-2 yr- 1 on the plot with no soil conservation measure to 3.47 t km-2 yr- 1 on the terraced plot. Contour tillage on gentle slopes decreased soil and nutrient losses and allowed more runoff running downslope. Event-averaged SLR also presented the same trend. Runoff depth decreased insignificantly from 72.83 mm on plot with no soil conservation measure, 68.40 mm on contour tillage plots, to 3.35 mm on terraced plot. Annual TN and TP losses decreased from 344.82 and 27.21 kg km-2 yr- 1 on cultivated plot with no soil conservation measure to 11.11 kg km-2 yr- 1 and 0.47 kg km-2 yr- 1 on terraced plot, respectively. Particulate TN and TP losses contributed over 50% of the total, depending on SLR. This study implies that contour tillage is preferred on gentle slopes, and steep slope should be implemented with terrace or other measures in the study region.
资助项目	Beijing Natural Science Foundation[8202045] ; National Natural Science Foundation of China[41977066]
WOS关键词	NONPOINT-SOURCE POLLUTION ; WATER-QUALITY ; MIYUN RESERVOIR ; VEGETATION COVER ; NUTRIENT LOSSES ; LOESS REGION ; EROSION ; RAINFALL ; PHOSPHORUS ; STREAMFLOW
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000647802000007
资助机构	Beijing Natural Science Foundation ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162596]
专题	中国科学院地理科学与资源研究所
通讯作者	Fang, Haiyan
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fang, Haiyan. Effect of soil conservation measures and slope on runoff, soil, TN, and TP losses from cultivated lands in northern China[J]. ECOLOGICAL INDICATORS,2021,126:8.
APA	Fang, Haiyan.(2021).Effect of soil conservation measures and slope on runoff, soil, TN, and TP losses from cultivated lands in northern China.ECOLOGICAL INDICATORS,126,8.
MLA	Fang, Haiyan."Effect of soil conservation measures and slope on runoff, soil, TN, and TP losses from cultivated lands in northern China".ECOLOGICAL INDICATORS 126(2021):8.