【摘 要】
：
采用热扩散式探针(TDP)对湿地松(Pinus elliottii)树干液流密度及其周围环境因子进行长期同步测定,同时辅以树干解析、枝条解析等树木生长量调查方法,以期探索不同尺度上湿地
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采用热扩散式探针(TDP)对湿地松(Pinus elliottii)树干液流密度及其周围环境因子进行长期同步测定,同时辅以树干解析、枝条解析等树木生长量调查方法,以期探索不同尺度上湿地松水分耗失与碳蓄积特征.结果表明,液流密度与冠层温度、相对湿度、光合有效辐射总量都呈显著的线性相关关系.液流密度与上述3个因子的多元线性回归方程和回归系数的相关性检验均达极显著水平.湿地松日均耗水量与边材面积间线性相关性显著.处于低龄期的湿地松,边材面积与胸径可用二次函数很好地拟合.根据2004年湿地松树干液流观测结果和生物量调查结果,推算出湿地松在生长过程中每形成1.773 1g干物质需要消耗约1kg水分.文末还根据生物量数据推算了树木生长过程中的耗水量.
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