干旱区生态环境知识资源中心(Arid): Spatial Distribution of Salinity and Sodicity in Arid Climate Following Long Term Brackish Water Drip Irrigated Olive Orchard

Arid

DOI	10.3390/w11122556
	Spatial Distribution of Salinity and Sodicity in Arid Climate Following Long Term Brackish Water Drip Irrigated Olive Orchard
	Katuri, John Rohit 1,2; Trifonov, Pavel 1; Arye, Gilboa 1
通讯作者	Arye, Gilboa
来源期刊	WATER
EISSN	2073-4441
出版年	2019
卷号	11 期号:12
英文摘要	The availability of brackish groundwater in the Negev Desert, Israel has motivated the cultivation of various salinity tolerant crops, such as olives trees. The long term suitability of surface drip irrigation (DI) or subsurface drip irrigation (SDI) in arid regions is questionable, due to salinity concerns, in particular, when brackish irrigation water is employed. Nevertheless, DI and SDI have been adopted as the main irrigation methods in olive orchards, located in the Negev Desert. Reports on continued reduction in olive yields and, essentially, olive orchard uprooting are the motivation for this study. Specifically, the main objective is to quantify the spatial distribution of salinity and sodicity in the active root-zone of olive orchards, irrigated with brackish water (electrical conductivity; EC = 4.4 dS m(-1)) for two decades using DI and subsequently SDI. Sum 246 soil samples, representing 2 m(2) area and depths of 60 cm, in line and perpendicular to the drip line, were analyzed for salinity and sodicity quantities. A relatively small leaching-zone was observed below the emitters depth (20 cm), with EC values similar to the irrigation water. However, high to extreme EC values were observed between nearby emitters, above and below the dripline. Specifically, in line with the dripline, EC values ranged from 10 to 40 dS m(-1) and perpendicular to it, from 40 to 120 dS m(-1). The spatial distribution of sodicity quantities, namely, the sodium adsorption ratio (SAR, (meq L-1)(0.5)) and exchangeable sodium percentage (ESP) resembled the one obtained for the EC. In line with the dripline, from 15 to 30 (meq L-1)(0.5) and up to 27%, in perpendicular to the drip line from 30 to 60 (meq L-l)(0.5) and up to 33%. This study demonstrates the importance of long terms sustainable irrigation regime in arid regions in particular under DI or SDI. Reclamation of these soils with gypsum, for example, is essential. Any alternative practices, such as replacing olive trees and the further introduction of even high salinity tolerant plants (e.g., jojoba) in this region will intensify the salt buildup without leaving any option for soil reclamation in the future.
英文关键词	arid region brackish water sub surface drip irrigation (SDI) salinity sodicity olives trees
类型	Article
语种	英语
国家	Israel ; India
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000507378600129
WOS关键词	OLEA-EUROPAEA L. ; RECLAIMED WASTE-WATER ; SOIL-SALINITY ; RESPONSES ; DESERT ; GROWTH ; TREES ; SUSTAINABILITY ; AGRICULTURE ; DYNAMICS
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
EI主题词	2019-12-01
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311172
作者单位	1.Ben Gurion Univ Negev, French Associates Inst Agr & Biotechnol Drylands, Jacob Blaustein Inst Desert Res, Sede Boqer Campus, IL-84990 Midreshet Ben Gurion, Israel; 2.Tamil Nadu Agr Univ, Directorate Crop Management, Dept Agron, Coimbatore 641003, Tamil Nadu, India
推荐引用方式 GB/T 7714	Katuri, John Rohit,Trifonov, Pavel,Arye, Gilboa. Spatial Distribution of Salinity and Sodicity in Arid Climate Following Long Term Brackish Water Drip Irrigated Olive Orchard[J]. Ben-Gurion University of the Negev,2019,11(12).
APA	Katuri, John Rohit,Trifonov, Pavel,&Arye, Gilboa.(2019).Spatial Distribution of Salinity and Sodicity in Arid Climate Following Long Term Brackish Water Drip Irrigated Olive Orchard.WATER,11(12).
MLA	Katuri, John Rohit,et al."Spatial Distribution of Salinity and Sodicity in Arid Climate Following Long Term Brackish Water Drip Irrigated Olive Orchard".WATER 11.12(2019).