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灌溉量对多枝柽柳水分生理及生长的影响
Authors
单立山
张希明
+3 more
杨小林
梁少民
解婷婷
Publication date
1 January 2008
Publisher
Abstract
运用热平衡式茎流计和压力室,对塔克拉玛干沙漠腹地不同水分管理条件下多枝柽柳(Tamarix ramosis-sima)的水分生理及生长特征进行了测定与分析。结果表明:在不同灌溉量条件下,多枝柽柳茎干液流速率的日变化不同,在灌溉量为35 kg/(株.次)和28 kg/(株.次)条件下,茎干液流的日变化曲线呈单峰型,且液流速率较高,变幅较大;但在灌溉量为17.5 kg/(株.次)条件下,其日变化曲线为双峰型,液流速率较低,变幅也较大。随着灌溉量的减少,日平均液流速率逐渐降低,日液流累积量也随之降低,日累积液流量分别为6 643.04 g,5 665.88 g,2 827.81 g。不同灌溉量条件下,多枝柽柳的清晨和午后水势都随着灌溉量的减少而降低,其中灌溉量对清晨水势的影响较大。不同灌溉量条件下,多枝柽柳的基径、新枝长度以及新枝直径都随着灌溉量的减少而减小,其平均生长速率也随着灌溉量的减少而降低
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016