干旱区生态环境知识资源中心(Arid): Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil

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DOI	10.1002/vzj2.20041
	Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil
	Weissman, Gal; Bel, Golan; Ben-Gal, Alon; Yermiyahu, Uri; Alexandrov, Boian; Rasmussen, Kim Orskov; Dahan, Ofer
通讯作者	Weissman, G (corresponding author), Ben Gurion Univ Negev, Zuckerberg Inst Water Res ZIWR, Blaustein Inst Desert Res BIDR, Sede Boqer Campus, IL-8499000 Sede Boqer, Israel.
来源期刊	VADOSE ZONE JOURNAL
EISSN	1539-1663
出版年	2020
卷号	19 期号:1
英文摘要	Excessive use of N fertilizers in agriculture often leads to NO3- accumulation in the unsaturated zone and to groundwater pollution. There is uncertainty regarding the variability in fertilizer transport and uptake efficiency due to the lack of studies based on continuous nondestructive measurements in unsaturated soils. In this study, we analyzed solute dynamics across the unsaturated zone underlying cultivated agricultural fields. Commercial crop rotations under four treatments, comprising two N fertilization regimes and two irrigation water salinity levels, were conducted in loess soil in the semiarid climate of the northern Negev Desert, Israel. The impact of the various treatments on water and solute dynamics below the root zone was monitored by a vadose zone monitoring system. The patterns of variations in soil water content and solute concentrations were analyzed using nonnegative tensor factorization. We found that irrigating using higher salinity water resulted in the earlier arrival of wetting fronts to the deeper layers and increased NO3- concentrations relative to the lower salinity treatments. Surprisingly, this effect was only seen in the deeper soil levels, whereas there was no significant difference in the arrival times and concentrations in the upper soil layers. Possible mechanisms are suggested and discussed.
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000618773300040
WOS类目	Environmental Sciences ; Soil Science ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
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/2XILL650/349215
作者单位	[Weissman, Gal; Dahan, Ofer] Ben Gurion Univ Negev, Zuckerberg Inst Water Res ZIWR, Blaustein Inst Desert Res BIDR, Sede Boqer Campus, IL-8499000 Sede Boqer, Israel; [Bel, Golan] Ben Gurion Univ Negev, Dept Environm Phys, Blaustein Inst Desert Res BIDR, Sede Boqer Campus, IL-8499000 Sede Boqer, Israel; [Bel, Golan] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel; [Ben-Gal, Alon; Yermiyahu, Uri] Agr Res Org, Gilat Res Ctr, Soil Water & Environm Sci, Negev, Israel; [Alexandrov, Boian; Rasmussen, Kim Orskov] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA
推荐引用方式 GB/T 7714	Weissman, Gal,Bel, Golan,Ben-Gal, Alon,et al. Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil[J]. Ben-Gurion University of the Negev,2020,19(1).
APA	Weissman, Gal.,Bel, Golan.,Ben-Gal, Alon.,Yermiyahu, Uri.,Alexandrov, Boian.,...&Dahan, Ofer.(2020).Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil.VADOSE ZONE JOURNAL,19(1).
MLA	Weissman, Gal,et al."Increased irrigation water salinity enhances nitrate transport to deep unsaturated soil".VADOSE ZONE JOURNAL 19.1(2020).