| 油松树干液流的时空变异性研究 |
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| 引用本文： | 孙鹏森,马履一,王小平. 油松树干液流的时空变异性研究[J]. 北京林业大学学报, 2000, 22(5): 1-6 |
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| 作者姓名： | 孙鹏森 马履一 王小平 |
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| 作者单位： | 北京林业大学资源与环境学院!100083，北京，北京林业大学资源与环境学院!100083，北京，北京林业大学资源与环境学院!100083，北京，北京林业大学资源与环境学院!100083，北京 |
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| 摘 要： | 应用热脉冲式液流测定系统 (HPVR)和Delta T自动气象站 ,对华北土石山区的主要造林树种油松的液流变化及其与环境因子的关系进行了 1年的观测 .对液流的日变化、各位点液流及最大液流位点的时空变异性进行了深入地研究 ,分析了水分胁迫条件下的液流特征 .应用SPSS系统对平均液流速度和环境因子的统计分析表明 ,辐射强度、风速、空气温度是影响液流的主要因子 ,相对湿度与土壤温度的影响较小 ,并给出了依据气象因子估算液流速度的统计模型
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| 关 键 词： | DeltaT自动气象站 热脉冲式液流测定系统 液流 位点 统计模型 |
Temporal and spacial variation of sap flow of Chinese pine(%Pinus tabulaeformis%). |
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| Abstract: | Heat Pulse Velocity Recorder(HPVR) and Delta T Automatic Weather Station were applied to study the stem sap flow of Chinese pine (%Pinus tabulaeformis)%, which is the main afforestation tree species in north Beijing mountain area. In this article the daily variation of sap flow velocity at different depths below the cambium and the sap flow characteristics under different water stress were studied from April to September of 1999. Results of the statistical analysis by SPSS showed that solar radiation intensity, wind speed, and temperature of atmosphere are the main factors affecting the sap flow, and relative humidity and soil temperature have less effect on it. Statistical model to calculate the sap flow velocity by micrometeorological factors was also provided. |
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| Keywords: | Delta|T Automatic Weather Station Heat Pulse Velocity Recorder sap flow points along radius statistical model |
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