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热脉冲法对胡杨树干液流的监测与蒸腾过程模拟
Authors
周宏飞
宋郁东
张江辉
白云岗
Publication date
1 January 2007
Publisher
Abstract
利用热脉冲技术对胡杨树干液流进行了研究,分析了胡杨树干液流日变化、不同胸径树干液流流量及胡杨液流的变化规律和其主要影响因子的关系。结果表明:在正常生长状态下,胡杨树干单位面积液流通量为0.450L/(cm2.d),在4~8月生长期内,日平均耗水量为78.335 L/d。胡杨树干断面单位时间内液流量变化呈明显的昼夜节律,白天的流速变化曲线呈双峰型,夜间树干液流速度处于平稳的低值,白天10:00与午后18:00左右达到两个峰值。随着胸径的增大,树干液流速度和液流量也随之增大。最后从理论分析着手建立2种类型的胡杨蒸腾模型,并用监测资料进行了验证
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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