干旱区生态环境知识资源中心(Arid): The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region

Arid

DOI	10.1088/1748-9326/ab9d3b
	The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region
	Gao, Ruxue; Dai, Quanhou; Gan, Yixian; Yan, Youjin; Peng, Xudong
通讯作者	Dai, QH
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2020
卷号	15 期号:9
英文摘要	Nutrient loss from sloping farmland with rocky desertification in karst regions leads to low farmland productivity and non-point source pollution. The mechanisms of nutrient outputs through water flow in such contexts under different rainfall intensities and slope angles were studied by using artificial rainfall simulation. Research showed that surface water flow occurred when the rainfall intensity was between 30 mm center dot h(-1)and 50 mm center dot h(-1), and the nutrient (TN, TP, TK) output through water flow showed the same pattern. Nutrient output through water flow was dominated by nutrient loss from surface and subsurface water flows when the rainfall intensity was >= 50 mm center dot h(-1). Rainfall intensity was found to be a dominant driver in comparison to slope angle and for limestone soil of the karst region in Southwest China, but slope angle only had a significant effect on TP output through surface water flow. The largest proportion of nutrient output was associated with surface flow, a lower proportion was associated with subsurface flow, and the lowest proportion with underground flow. The nutrient output through underground water flow directly led to groundwater pollution, although it was not large. The results of this study provide a theoretical reference for the control of nutrient output through water flow and the management of nonpoint source pollution in karst regions.
英文关键词	karst region sloping farmland with slight rocky desertification rainfall intensity slope angle nutrient output through water flow
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000570737400001
WOS关键词	GROSS PRIMARY PRODUCTIVITY ; RAINFALL INTENSITY ; NITROGEN LOSS ; PHOSPHORUS TRANSPORT ; SOLUTE TRANSPORT ; SURFACE RUNOFF ; SOIL LOSS ; IMPACTS ; EROSION ; LOSSES
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326363
作者单位	[Gao, Ruxue; Dai, Quanhou; Gan, Yixian; Yan, Youjin; Peng, Xudong] Guizhou Univ, Coll Forestry, Guiyang, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Gao, Ruxue,Dai, Quanhou,Gan, Yixian,et al. The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region[J],2020,15(9).
APA	Gao, Ruxue,Dai, Quanhou,Gan, Yixian,Yan, Youjin,&Peng, Xudong.(2020).The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region.ENVIRONMENTAL RESEARCH LETTERS,15(9).
MLA	Gao, Ruxue,et al."The mechanisms of nutrient output through water flow from sloping farmland with slight rocky desertification in a karst region".ENVIRONMENTAL RESEARCH LETTERS 15.9(2020).