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不同灌溉量条件下乔木状沙拐枣蒸腾耗水特性的研究[J]
Authors
中国科学院新疆生态与地理研究所
单立山
+4 more
张希明
李毅
王蕙
甘肃农业大学林学院
Publication date
1 January 2012
Publisher
Abstract
利用Flow32热平衡式茎流计,对塔克拉玛干沙漠腹地不同灌溉量条件下(每次每株灌水17.5、28和35 kg)乔木状沙拐枣(Calligonum arborescens)的水分生理进行研究,结果表明:茎干液流日变化随着灌溉量的不同而有所不同,灌溉量每株每次35和28 kg,其日变化曲线呈"单峰型",液流速率较高;灌溉量每株每次17.5 kg,日变化曲线为"双峰型",且液流速率较低,其生长受到胁迫。相同时间不同灌溉量条件下,随着灌溉量的减少,其清晨和午后水势逐渐降低,且气候条件越严酷灌溉量越少,水势降低更显著;整个生长季7月水势最低。相同时间不同灌溉量条件下,单株日耗水量也随灌溉量的减少而减少,..
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Last time updated on 29/11/2016