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题名:
Spatio-temporal dynamics of soil salt under saline irrigation in Taklimakan Desert artificial shelterbelt
作者: Li CJ(李从娟) ; Wang YD(王永东) ; Lei JQ(雷加强) ; Xu XW(徐新文)
会议文集: 2012IEEE
会议名称: 会议论文
会议日期: 2012-06-01
出版日期: 2012-06-01
会议地点: beijing
其他题名: Spatio-temporal dynamics of soil salt under saline irrigation in Taklimakan Desert artificial shelterbelt
收录类别: EI
部门归属: 新疆策勒荒漠草地生态系统国家野外研究站
英文摘要: Irrigation with saline water is in risk of soil salinity, which is a major threat for plant growth since salinity stored within the root zone. To determine the effects of saline irrigation on soil salinity, an experiment was carried out at the artificial shelterbelt in Taklimakan Desert Highway to examine soil salinity under different salt concentration irrigation. The rationale for conducting this study was to understand the movement for salinity in soil profile under saline irrigation. The results showed that topsoil (0-5 cm) salinity was greatly correlated with the mineralization of irrigation water, at temporal scale. During an irrigation cycle, the topsoil salinity increased at first four days, the largest soil salinity presented at the 4th day (11.7 dS m-1), and then presented a decreasing trend at the last ten days, while at the under layers (5-210 cm), soil salts were great less than the topsoil, and presented a decreasing trend within an irrigation cycle. During a growing season, topsoil salts presented a unimodal distribution under higher salinity irrigation (28 g L-1), from Apr to Jul it presented a rising trend, and then presented a decreasing trend to Oct, and the larger salinity presented from Jun to Aug, this phenomenon because great higher evaporation during Jun to Aug which lead to upward flux exceeding downward flux, while soil salinity did not change much throughout the soil profile of 5 cm to 200 cm. Yearly dynamics for topsoil salinity presented an increasing trend with the irrigation years, and also changed little at the under layers (5 cm to 210 cm) from 2002 to 2008. The spatial or profile distribution for soil salt showed salt not only accumulated at the topsoil, but also leached to the under layers (130 to 280 cm) and ground water (410 cm), but no salinity at the root zone(5 to 130 cm). These results documented that even with saline irrigation in Taklimakan Desert Highway artificial shelterbelt; it will lead no sodality for plants, since the content of soil salt at root zone was small (about 0.4 dS m-1). Therefore, saline groundwater should be used for protecting the Taklimakan Desert Highway. However, the impact of long-term irrigation with such salinity groundwater for vegetation should not be ignored; low saline water and also limiting irrigation quantities and frequency should be considered in future.
语种: 英语
内容类型: 会议论文
URI标识: http://ir.xjlas.org/handle/365004/11309
Appears in Collections:监测实验系统(野外台站)_新疆策勒荒漠草地生态系统国家野外研究站_会议论文

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Recommended Citation:
Li CJ,Wang YD,Lei JQ,et al. Spatio-temporal dynamics of soil salt under saline irrigation in Taklimakan Desert artificial shelterbelt[C]. 见:会议论文. beijing. 2012-06-01.
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