干旱区生态环境知识资源中心(Arid): Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China

Arid

DOI	10.1371/journal.pone.0246505
	Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China
	Yao, Yiwen; Dai, Quanhou; Gao, Ruxue; Gan, Yixian; Yi, Xingsong
通讯作者	Dai, QH (corresponding author), Guizhou Univ, Inst Soil Eros & Ecol Restorat, Inst Forest Resources & Environm Guizhou, Coll Forestry, Guiyang, Peoples R China.
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2021
卷号	16 期号:3
英文摘要	Nutrient losses from sloping farmland in karst areas lead to the decline in land productivity and nonpoint source pollution. A specially tailored steel channel with an adjustable slope and underground hole fissures was used to simulate the microenvironment of the dual structure of the surface and underground of sloping farmland in a karst area. The artificial rainfall simulation method was used to explore the surface and underground runoff characteristics and nutrient losses from sloping farmland under different rainfall intensities. The effect of rainfall intensity on the nutrient loss of farmland on karst sloping land was clarified. The results showed that the surface was the main route of runoff and nutrient loss during the rainy season on sloping farmland in karst areas. The influence of rainfall intensity on the nutrients in surface runoff was more substantial than that on underground runoff nutrients. Nutrient loss was more likely to occur underground than on the surface. The losses of total nitrogen, total phosphorus, and total potassium in surface and underground runoff initially increased and then gradually stabilized with the extension of rainfall duration and increased with increasing rainfall intensity and the amount of nutrient runoff. The output of nutrients through surface runoff accounted for a high proportion of the total, and underground runoff was responsible for a low proportion. Although the amount of nutrients output by underground runoff was small, it could directly cause groundwater pollution. The research results provide a theoretical reference for controlling land source pollution from sloping farming in karst areas.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000631029700085
WOS关键词	NITROGEN LOSS ; ROCKY DESERTIFICATION ; SOIL-EROSION ; AVAILABLE NITROGEN ; BARE SLOPES ; SEDIMENT ; PHOSPHORUS ; ERODIBILITY ; SIMULATION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351390
作者单位	[Yao, Yiwen; Dai, Quanhou; Gao, Ruxue; Gan, Yixian; Yi, Xingsong] Guizhou Univ, Inst Soil Eros & Ecol Restorat, Inst Forest Resources & Environm Guizhou, Coll Forestry, Guiyang, Peoples R China
推荐引用方式 GB/T 7714	Yao, Yiwen,Dai, Quanhou,Gao, Ruxue,et al. Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China[J],2021,16(3).
APA	Yao, Yiwen,Dai, Quanhou,Gao, Ruxue,Gan, Yixian,&Yi, Xingsong.(2021).Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China.PLOS ONE,16(3).
MLA	Yao, Yiwen,et al."Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China".PLOS ONE 16.3(2021).