Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.envexpbot.2012.06.002 |
Assessment of soil salinization risks under irrigation with brackish water in semiarid Tunisia | |
Bouksila, Fethi1; Bahri, Akissa2; Berndtsson, Ronny3,4; Persson, Magnus4; Rozema, Jelte5; Van der Zee, Sjoerd E. A. T. M.6 | |
通讯作者 | Bouksila, Fethi |
来源期刊 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
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ISSN | 0098-8472 |
出版年 | 2013 |
卷号 | 92页码:176-185 |
英文摘要 | The salinity problem is becoming increasingly widespread in arid countries. In semiarid Tunisia about 50% of the irrigated land is considered as highly sensitive to salinization. To avoid the risk of salinization, it is important to control the soil salinity and keep it below plant salinity tolerance thresholds. The objective of the present study was to provide farmers and rural development offices with a tool and methodology for predicting, monitoring of soil salinity for a better agronomical strategy:The experiments were carried out in the highly complex and heterogeneous semiarid Kalaat Landalous irrigated district of Tunisia. The field and laboratory measurements of soil and water properties were conducted in 1989 and 2006 at different observation scales (2900 ha, 1400 ha, 5200 m long transect, and soil profiles). Seventeen years of reclamation of a saline and waterlogged soil led to the reduction of average electrical conductivity of the soil saturated paste extract (ECe), measured at 5 soil depths (from 0 to 2 m) below the plant salt tolerance threshold and the dilution of groundwater salinity from 18.3 to 6.6 dS m(-1). The variation in soil salt storage (Delta Mss = Mss(2006) - Mss(1989)) in the vadose zone was negative, equal to about -145 x 10(3) ton (approximate to-50 ton ha(-1)). During the same period, the salt balance (Siw-Sdw) estimated from the input dissolved salt brought by irrigation water (Siw) and output salts exported by the drainage network (Sdw) was equal to -685 x 10(6) kg and the Sdw was 945 x 10(6) kg. Under irrigation and efficient drainage, the soil salinization could be considered as a reversible process. At the transect scale, the high clay content and the exchangeable sodium percentage was negatively correlated to saturated hydraulic conductivity. The textural stratification, observed at soil profile scale, favors accumulation of salt in the soil. Based on the findings related to the multiscale assessment of soil salinity and groundwater properties, soil salinization factors were identified and a soil salinization risk map (SRU) was elaborated. The shallow groundwater constitutes the main risk of soil salinization. This map can be used by both land planners and farmers to make appropriate decisions related to crop production, and soil and water management. (C) 2012 Elsevier B.V. All rights reserved. |
英文关键词 | Salt balance Soil salinity Long term monitoring Shallow ground water Tunisia |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
国家 | Tunisia ; Sweden ; Netherlands |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000320678600017 |
WOS关键词 | SALT ; MANAGEMENT ; BALANCE |
WOS类目 | Plant Sciences ; Environmental Sciences |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/176860 |
作者单位 | 1.Natl Inst Res Rural Engn Waters & Forests, Ariana 2080, Tunisia; 2.African Water Facil, Tunis 1002, Tunisia; 3.Lund Univ, Ctr Middle Eastern Studies, S-22100 Lund, Sweden; 4.Lund Univ, Dept Water Resources Engn, S-22100 Lund, Sweden; 5.Vrije Univ Amsterdam, Fac Earth & Life Sci, Inst Ecol Sci, Dept Syst Ecol, Amsterdam, Netherlands; 6.Wageningen Univ, Environm Sci Grp, Dept Soil Phys Ecohydrol & Groundwater Management, NL-6700 AA Wageningen, Netherlands |
推荐引用方式 GB/T 7714 | Bouksila, Fethi,Bahri, Akissa,Berndtsson, Ronny,et al. Assessment of soil salinization risks under irrigation with brackish water in semiarid Tunisia[J],2013,92:176-185. |
APA | Bouksila, Fethi,Bahri, Akissa,Berndtsson, Ronny,Persson, Magnus,Rozema, Jelte,&Van der Zee, Sjoerd E. A. T. M..(2013).Assessment of soil salinization risks under irrigation with brackish water in semiarid Tunisia.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,92,176-185. |
MLA | Bouksila, Fethi,et al."Assessment of soil salinization risks under irrigation with brackish water in semiarid Tunisia".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 92(2013):176-185. |
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