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地下水埋深及矿化度对多枝柽柳幼苗光合特征及生长的影响/Effects of Groundwater Depth and Mineralization Degree on Photosynthesis and Growth of Tamarix Ramosissima Seedlings[J]
Authors
中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011
中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011/中国科学院研究生院,北京100049
+3 more
李君
王鹏
赵成义
Publication date
1 January 2012
Publisher
Abstract
采用简易Lysimeter研究了不同地下水埋深(20,60,100 cm)和不同矿化度(〈1.00 g/L淡水,1.0~3.0 g/L微咸水,3.0~10.0 g/L咸水)对多枝柽柳幼苗光合特征及生长的影响。结果表明,不同地下水埋深与矿化度对多枝柽柳幼苗的光合特征及生长均有影响;在地下水埋深20 cm,矿化度为3.0~10.0 g/L的咸水条件下,多枝柽柳幼苗的最大光合速率(Pnmax)为66.93μmol/(m2.s),光合速率(Pn)、气孔导度(Cond)、水分利用效率(WUE)及羧化速率(CE)对光强的响应均大于其它试验处理。不同的地下水埋深、矿化度可显著影响多枝柽柳幼苗的最大光合速率(Pnmax)、表观量子效率(AQY)、暗呼吸速率(Rd)、光饱和点(LSP)等光合特征。进一步分析表明,在地下水埋深20 cm,矿化度为3.0~10.0 g/L的咸水条件下,多枝柽柳幼苗的生态适应能力较强,幼苗能够适应生境变化迅速生长,获得竞争优势
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Last time updated on 29/11/2016