干旱区生态环境知识资源中心(Arid): Rapid Response of Runoff Carrying Nitrogen Loss to Extreme Rainfall in Gentle Slope Farmland in the Karst Area of SW China

Arid

DOI	10.3390/w14203341
	Rapid Response of Runoff Carrying Nitrogen Loss to Extreme Rainfall in Gentle Slope Farmland in the Karst Area of SW China
	Wang, Yong; Dai, Quanhou; Ding, Pengwei; Li, Kuaifen; Yi, Xingsong; He, Jie; Peng, Xudong; Yan, Youjin; Zhao, Min; Yang, Yingchong
通讯作者	Dai, QH
来源期刊	WATER
EISSN	2073-4441
出版年	2022
卷号	14 期号:20
英文摘要	Nitrogen loss is the main reason for land quality degradation and productivity decline and an important factor in groundwater pollution. Extreme rainfall has occurred frequently in Karst areas of southwest China in recent years. It is of great significance to study the response of soil nitrogen loss to extreme rainfall in Karst areas to prevent and treat land quality degradation and non-point source pollution. In this study, field monitoring and indoor artificial rainfall simulation were used to study the loss characteristics of total soil nitrogen (TN), ammonium (NH4+-N) nitrogen, and nitrate-nitrogen (NO3--N) in Karst bare slope farmland (slope angles of 5 degrees and 10 degrees) under extreme rainfall conditions. The results showed that: (1) Extreme rainfall (90 mm/h) increased the surface runoff, middle soil runoff, and underground runoff by 1.68 times, 1.16 times, and 1.43 times, respectively, compared with moderate rainfall (60 mm/h), so that nitrogen loss increased with runoff. (2) The loss of nitrate-nitrogen in surface, soil, and underground under extreme rainfall conditions was 223.99, 147.93, and 174.02% higher than that under moderate rainfall conditions, respectively; the nitrate losses were 203.78, 160.18, and 195.39% higher, respectively. Total nitrogen losses were 187.33, 115.45, and 138.68% higher, respectively. (3) The influencing factors of total soil nitrogen and nitrate-nitrogen loss in Karst slope farmland were slope > rainfall duration > rainfall intensity, while the influencing factors of ammonium nitrogen loss were rainfall duration > slope > rainfall intensity. Therefore, in controlling nitrogen loss in Karst slope farmland, changing slope degree and increasing farmland coverage may be useful measures to slow the nitrogen loss caused by extreme rainfall.
英文关键词	artificial simulated rainfall Karst soil erosion production flow ground loss underground loss
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:000873777000001
WOS关键词	ROCKY DESERTIFICATION ; SOIL-EROSION ; NITRATE-NITROGEN ; LAND-USE ; INTENSITY ; AMMONIUM ; MOISTURE ; EPIKARST ; IMPACTS ; YIELD
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394843
推荐引用方式 GB/T 7714	Wang, Yong,Dai, Quanhou,Ding, Pengwei,et al. Rapid Response of Runoff Carrying Nitrogen Loss to Extreme Rainfall in Gentle Slope Farmland in the Karst Area of SW China[J],2022,14(20).
APA	Wang, Yong.,Dai, Quanhou.,Ding, Pengwei.,Li, Kuaifen.,Yi, Xingsong.,...&Yang, Yingchong.(2022).Rapid Response of Runoff Carrying Nitrogen Loss to Extreme Rainfall in Gentle Slope Farmland in the Karst Area of SW China.WATER,14(20).
MLA	Wang, Yong,et al."Rapid Response of Runoff Carrying Nitrogen Loss to Extreme Rainfall in Gentle Slope Farmland in the Karst Area of SW China".WATER 14.20(2022).