Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain

doi:10.1016/j.agwat.2020.106255

	Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain
	Dong, Shide 2,3; Wan, Shuqin 3; Kang, Yaohu 1,3; Li, Xiaobin 3
刊名	AGRICULTURAL WATER MANAGEMENT
	2020-09-01
卷号	239 页码:10
关键词	Ecological conservation system Drip irrigation Saline soil Reclamation
ISSN号	0378-3774
DOI	10.1016/j.agwat.2020.106255
通讯作者	Kang, Yaohu(kangyh@igsnrr.ac.cn)
英文摘要	Reclaiming saline soils at the edge of Yinchuan Plain is of paramount importance for ecological conservation. Therefore, efficiency of drip irrigation method was evaluated in a field experiment. The experiment using drip irrigation as reclamation method was carried out that included five soil matric potentials (SMPs) controlled at -5, -10, -15, -20 and -25 kPa (treatments S1-S5, respectively) directly under drip emitters at 20 cm depth. Measures including vegetation collocation, high-raised ridge and three-stage drip irrigation scheduling were adopted. Results showed that SMP thresholds significantly affected the spatial distributions of both electrical conductivity (ECe) and sodium adsorption ratio (SARe) based on extracts of saturated paste. The low salinity and SARe zones either kept enlarging or remained stable when SMP thresholds were above -20 kPa. However, for treatment S5(-25 kPa), these gradually shrank with time. By the end of the second year, the average ECe values in treatments S1-S5 were 2.05, 2.59, 3.36, 3.05 and 3.9 dS m(-1), respectively, indicating that ECe increased linearly as SMP threshold decreased. The SARe showed the same trend, with corresponding values of 9.56, 10.48, 12.26, 12.82 and 15.23 (mmol L-1)(0.5). The pH of the saturated soil extract (pHe) in all treatments increased from 7.64 to around 8.00 and was not significantly affected by treatments. Moreover, the two-year survival rates of the dominant trees were > 87.5% when SMP threshold was above -20 kPa. The growth indexes of plants reduced with the decrease in SMP thresholds and statistical analysis suggested that -20 to -17 kPa was an important SMP range, below which the forage yield of the herbaceous legume Astragalus adsurgens dropped sharply. This study suggested the SMP threshold of -20 kPa was important for drip irrigation scheduling and the drip irrigation, combined with ridging plantation, was efficient for both vegetation reclamation and reclaiming saline soils in these saline areas with shallow ground water.
资助项目	National Key Research and Development Program of China[2016YFC0501304] ; National Key Research and Development Program of China[2016YFC0501305] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDJ-SSW-DQC028] ; Study and Demonstration of High-efficiency Water-saving Irrigation Technology of Reducing salt and Increasing Grass (Feeding) for Grazing Experimental Demonstration Project of 50,000 Mu in Bayannur
WOS关键词	ROSE ROSA-CHINENSIS ; COTTON GROWTH ; SALT ; WATER ; RECLAMATION ; CHINA
WOS研究方向	Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000539092600017
资助机构	National Key Research and Development Program of China ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Study and Demonstration of High-efficiency Water-saving Irrigation Technology of Reducing salt and Increasing Grass (Feeding) for Grazing Experimental Demonstration Project of 50,000 Mu in Bayannur
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162170]
专题	中国科学院地理科学与资源研究所
通讯作者	Kang, Yaohu
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, 11A Datun Rd, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Dong, Shide,Wan, Shuqin,Kang, Yaohu,et al. Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain[J]. AGRICULTURAL WATER MANAGEMENT,2020,239:10.
APA	Dong, Shide,Wan, Shuqin,Kang, Yaohu,&Li, Xiaobin.(2020).Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain.AGRICULTURAL WATER MANAGEMENT,239,10.
MLA	Dong, Shide,et al."Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain".AGRICULTURAL WATER MANAGEMENT 239(2020):10.