Salt characteristics and soluble cations redistribution in an impermeable calcareous saline-sodic soil reclaimed with an improved drip irrigation

doi:10.1016/j.agwat.2017.11.020

	Salt characteristics and soluble cations redistribution in an impermeable calcareous saline-sodic soil reclaimed with an improved drip irrigation
	Zhang, Tibin 1,2,3; Zhan, Xiaoyun 1; He, Jianqiang 4; Feng, Hao 1,2,3; Kang, Yaohu 5
刊名	AGRICULTURAL WATER MANAGEMENT
	2018-01-15
卷号	197 页码:91-99
关键词	Drip irrigation Soil permeability Soil reclamation Takyric solonetz
ISSN号	0378-3774
DOI	10.1016/j.agwat.2017.11.020
通讯作者	Zhan, Xiaoyun(zhanxiaoyun2005@163.com)
英文摘要	Saline-sodic and sodic soils are characterized by the occurrence of excessive Na+ that adversely affect soil properties. Takyric solonetz, a saline-sodic soil with a poor structure, a low permeability (saturated hydraulic conductivity <0.1 mm d(-1)) and a considerable CaCO3, widely distributes in arid regions, Northwest China. A 3-year field experiment was conducted toreclaim this impermeable saline-sodic wasteland with an improved drip irrigation, where a sand-filled niche beneath drip emitter was adopted for ridge cultivation of Lycium barbarum L. Through the extensive sampling in soil transects, the salt characteristics and redistributions of soluble cations were evaluated. Results indicated that the soil properties that hindered takyric solonetz from being reclaimed orderly were, soil salinity, structure, alkalinity, and the concentrations of other ions (e.g. K+). Salt leaching through the water regulation had the highest priority in reclaiming takyric solonetz, and followed by improving soil structure through changing ions composition and reducing soil sodicity. After reclamation, soil Na+ concentrations decreased in root zone, but increased in top layers of ridge slope and furrow, while the increases of K* were only found beneath drip line, behaving little mobility with water flow. Considerable increases of divalent cations (Ca2+ and Mg2+) occurred beneath drip line, but no obvious changes occurred in other regions of soil transect. It was concluded that irrigation water and dissolution of intrinsic CaCO3 provided sufficient Ca2+ to replace the excessive Na+, and the replaced Na+ was leached out of root zone, resulting in a decrease of soil sodicity and improvement of soil structure. The reclamation measures were expected to have good sustainability, which was supported theoretically by the priorities of actions derived from salt characteristics. Thus, this improved drip irrigation provided a potential substitute for the costly amendments to ameliorate impermeable saline-sodic soils, especially with considerable amount of CaCO3. (c) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[51509238] ; National Natural Science Foundation of China[41503078] ; Fundamental Research Funds for Northwest AF University[2452015091] ; Light of West China program of Chinese Academy of Sciences ; Coordination & Innovation Project of Science & Technology in Shaanxi[2016KTZDNY03-06]
WOS关键词	BIOLOGICAL-PROPERTIES ; RECLAMATION ; AMENDMENTS ; GYPSUM ; GROWTH ; CHINA ; PHYTOREMEDIATION ; AMELIORATION ; STRATEGIES ; EXCHANGE
WOS研究方向	Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000423001400009
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for Northwest AF University ; Light of West China program of Chinese Academy of Sciences ; Coordination & Innovation Project of Science & Technology in Shaanxi
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/56964]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhan, Xiaoyun
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tibin,Zhan, Xiaoyun,He, Jianqiang,et al. Salt characteristics and soluble cations redistribution in an impermeable calcareous saline-sodic soil reclaimed with an improved drip irrigation[J]. AGRICULTURAL WATER MANAGEMENT,2018,197:91-99.
APA	Zhang, Tibin,Zhan, Xiaoyun,He, Jianqiang,Feng, Hao,&Kang, Yaohu.(2018).Salt characteristics and soluble cations redistribution in an impermeable calcareous saline-sodic soil reclaimed with an improved drip irrigation.AGRICULTURAL WATER MANAGEMENT,197,91-99.
MLA	Zhang, Tibin,et al."Salt characteristics and soluble cations redistribution in an impermeable calcareous saline-sodic soil reclaimed with an improved drip irrigation".AGRICULTURAL WATER MANAGEMENT 197(2018):91-99.