干旱区生态环境知识资源中心(Arid): Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China

Arid

DOI	10.1016/j.scitotenv.2022.153222
	Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China
	Wang, Zaimin; Li, Zhaofeng; Zhan, Hongbin; Yang, Sifu
通讯作者	Li, ZF
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	820
英文摘要	Water shortage and soil salinization are the two main factors that are limiting the sustainability of agriculture in arid and semi-arid areas. The mulched drip irrigation (MDI) with brackish groundwater is widely used in the arid areas of Northwest China. In this study, field experiments were carried out to study the effect of long-term MDI with brackish groundwater on the soil and groundwater environment. It was found that the groundwater level decreased in the Peacock river watershed steadily from 2008 to 2019, resulted from escalating groundwater exploitation due to the expanding agricultural irrigation area and increasing irrigation water demand. The decline of groundwater level reduced the evaporation of phreatic surface (ETg) and groundwater recharge from MDI (R-g). The ETg and R-g would be very small, where ETg tended to be zero and R-g would decrease to a constant value, while the water table depth was larger than 3 m. In addition, MDI had little effect on the soil moisture content (SMC) during the MDI period while the groundwater level was shallow (less than 1.9 m), and it increased SMC gradually as the cycle of irrigations increased while the groundwater level was deep (greater than 4.2 m). MDI reduced the concentration of soluble salt ions (Na+, K+ and Cl-) and increased the concentration of Ca2+ and SO42- in the soil. The accumulation of Ca2+ and SO42- in bare soil was more serious than that in the mulched land. The SMC, soil ions concentrations, soil salinity and the total dissolved solids of groundwater decreased significantly with the decrease of the groundwater level, and the salinization degree of the soil and groundwater tended to be weak in the field experimental site. However, groundwater level dropped too much caused by increasing agricultural irrigation would be harmful to the sustainable ecological environment.
英文关键词	Soil salinity Groundwater quality Soil moisture Groundwater level Saline mulched drip irrigation Northwest China
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000764882700013
WOS关键词	COTTON FIELD ; HYDRAULIC CONDUCTIVITY ; WATER ; EVAPOTRANSPIRATION ; ZONE ; SALT ; SALINIZATION ; XINJIANG ; MOISTURE ; RECHARGE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394352
推荐引用方式 GB/T 7714	Wang, Zaimin,Li, Zhaofeng,Zhan, Hongbin,et al. Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China[J],2022,820.
APA	Wang, Zaimin,Li, Zhaofeng,Zhan, Hongbin,&Yang, Sifu.(2022).Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China.SCIENCE OF THE TOTAL ENVIRONMENT,820.
MLA	Wang, Zaimin,et al."Effect of long-term saline mulched drip irrigation on soil-groundwater environment in arid Northwest China".SCIENCE OF THE TOTAL ENVIRONMENT 820(2022).