Soil water and salinity dynamics under the improved drip-irrigation scheduling for ecological restoration in the saline area of Yellow River basin

doi:10.1016/j.agwat.2021.107255

	Soil water and salinity dynamics under the improved drip-irrigation scheduling for ecological restoration in the saline area of Yellow River basin
	Dong, Shide 1,2; Wang, Guangmei1 ; Kang, Yaohu 2,3; Ma, Qian 1; Wan, Shuqin 2
发表期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
	2022-04-30
卷号	264 页码:11
关键词	Saline soil Drip-irrigation scheduling Revegetation Leaching fraction
DOI	10.1016/j.agwat.2021.107255
通讯作者	Wan, Shuqin([email protected])
英文摘要	The drip-irrigation scheduled by different soil matric potential (SMP) thresholds at different stages according to soil water and salt management purposes was usually adopted for revegetation in saline-alkali land. To reveal the desalinization mechanism of this multi-stage drip-irrigation scheduling, a 3-year field trial, adopting this method for revegetation, was conducted in an arid saline area. The trial consisted of 5 irrigation treatments marked S1 S5, with their SMP that monitored directly under drip emitter at 0.2 m depth correspondingly controlled higher than -5, -10, -15, -20 and -25 kPa. Results showed the SMP threshold of 5 kPa during the unified irrigation stage induced a leaching fraction (LF) of 42.6% and a minimum recharge amount (MRA) from groundwater of zero, thus resulting the relative desalinization rate (RDR) of 91.8% in 0-120 cm soil layer. When treatment applied, the average electrical conductivity of the saturated soil extracts (ECe) in 0-40 cm among three growing seasons in S1-S5 treatments linearly increased from 0.90 to 1.73 dS/m as SMP threshold decreased from -5 to -25 kPa, resulting from the LF correspondingly decreasing from 18.4% to 2.5% and the MRA increasing from 0 to 21.4 mm. The inter-annual salt dynamic indicated a salt equilibrium state was formed in 80-120 cm soil layer when the SMP threshold was set higher than 10 kPa and that was formed in 40-80 cm soil layer if the SMP threshold was set between -20 and -15 kPa. This study found the SMP threshold controlled the LF and MRA, and eventually determined the dynamics of soil salinity, which explained the efficient desalinization mechanism under the multi-stage drip-irrigation scheduling. A key SMP threshold of 5 kPa for rapid soil leaching stage and that of -20 kPa for precise salt regulating stage were recommended for vegetation construction in the low-lying saline area.
资助机构	National Key Research & Development Program of China ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences
收录类别	SCI
语种	英语
关键词[WOS]	CHINENSIS GROWTH ; SALT ; EVAPOTRANSPIRATION ; RECLAMATION ; CHINA ; YIELD
研究领域[WOS]	Agriculture ; Water Resources
WOS记录号	WOS:000792814400005
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/31045
专题	中国科学院海岸带环境过程与生态修复重点实验室
通讯作者	Wan, Shuqin
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res YIC, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc,YICCAS, Yantai 264003, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, 11 A Datun Rd, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Dong, Shide,Wang, Guangmei,Kang, Yaohu,et al. Soil water and salinity dynamics under the improved drip-irrigation scheduling for ecological restoration in the saline area of Yellow River basin[J]. AGRICULTURAL WATER MANAGEMENT,2022,264:11.
APA	Dong, Shide,Wang, Guangmei,Kang, Yaohu,Ma, Qian,&Wan, Shuqin.(2022).Soil water and salinity dynamics under the improved drip-irrigation scheduling for ecological restoration in the saline area of Yellow River basin.AGRICULTURAL WATER MANAGEMENT,264,11.
MLA	Dong, Shide,et al."Soil water and salinity dynamics under the improved drip-irrigation scheduling for ecological restoration in the saline area of Yellow River basin".AGRICULTURAL WATER MANAGEMENT 264(2022):11.