| 干旱荒漠区沙冬青茎干液流变化特征及其与气象因子的关系 |
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| 引用本文： | 郭树江,徐先英,杨自辉,李爱德,李得禄,柴成武,王多泽.干旱荒漠区沙冬青茎干液流变化特征及其与气象因子的关系[J].西北植物学报,2011,31(5):1003-1010. |
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| 作者姓名： | 郭树江 徐先英 杨自辉 李爱德 李得禄 柴成武 王多泽 |
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| 作者单位： | 1. 甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤,733300;甘肃省治沙研究所,兰州,730070
2. 甘肃省治沙研究所,兰州,730070 |
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| 基金项目： | 国家自然科学基金，国家公益性行业(林业)科研专项，国家农转资金 |
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| 摘 要： | 采用热平衡包裹式树干液流仪(stem heat balance,SHB)监测沙冬青(Ammopiptanthus mongolicus)茎干液流日变化,并利用自动气象站同步监测太阳辐射、空气温度、空气相对湿度、风速等气象因子日变化,研究沙冬青茎干液流在不同季节和天气条件下的日变化特征及其与环境气象因子的关系.研究表明:(1)在夏季沙冬青茎干液流昼夜区别明显,且变幅较大,液流于8:00~9:00开始启动,并迅速于9:00左右达到峰值,然后立即有一个大幅度的下降,后在小幅度波动中维持到19:00左右停止;沙冬青茎干液流在夜间较弱;(2)不同天气条件对沙冬青液流的变化影响较大,沙冬青茎干液流速率的总体变化幅度表现为晴天>阴天>沙尘天气;(3)各季节典型天气下沙冬青茎干液流速率表现为夏季>春季>冬季;生长季茎干液流启动时间早,液流量大;春季液流启动时间次之,液流量变化平缓,维持时间长;冬季液流启动时间最迟,液流变化速率大且维持时间短;(4)沙冬青茎干液流与气象因子的关系密切,其中与太阳辐射的关系最为密切,其次是空气温度和相对湿度,影响最小的是风速.
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| 关 键 词： | 干旱荒漠区 沙冬青 茎干液流 变化特征 气象因子 |
Relationships between Sap Flow Patterns of Ammopiptanthus mongolicus and Environmental Fcators in Desert Areas |
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| GUO Shu-jiang,XU Xian-ying,YANG Zi-hui,LI Ai-de,LI De-lu,CHAI Cheng-wu,WANG Duo-ze.Relationships between Sap Flow Patterns of Ammopiptanthus mongolicus and Environmental Fcators in Desert Areas[J].Acta Botanica Boreali-Occidentalia Sinica,2011,31(5):1003-1010. |
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| Authors: | GUO Shu-jiang XU Xian-ying YANG Zi-hui LI Ai-de LI De-lu CHAI Cheng-wu WANG Duo-ze |
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| Institution: | GUO Shu-jiang1,2,XU Xian-ying1,YANG Zi-hui1,LI Ai-de1,LI De-lu2,CHAI Cheng-wu1,WANG Duo-ze1,2(1 Gansu Minqin National Studies Station for Desert Steppe Ecosystem,Minqin,Gansu 733300,China,2 Gansu Desert Control Research Institution,Lanzhou,Gansu 730070,China) |
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| Abstract: | The diurnal and seasonal variations of sap flow of Ammopiptanthus mongolicus were measured with Stem Heat Balance that was produced by the Dynamax company of Australian,At the same time,the simultaneous weather factors were observed at a nearby automatic weather station,and the correlations between sap flow and each meteorological factor were analyzed.The results showed that:(1)It is obvious that the difference of sap flow is significance in the summer season,and the amplitude is big.The sap flow start at 8... |
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| Keywords: | arid desert area Ammopiptanthus mongolicus sap flow change characteristics meteorological factor |
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