常见绿化树种绦柳(Salix matsudana cv.‘Pendula’)耗水特性  

Water consumption characteristics of common greening tree species Salix matsudana cv. ‘Pendula’

作　　者：王玉涛[1,2] 李吉跃[1,3] 胡东燕[4] 陈崇[1] 张佐双[4] 刘东焕[4] 王树标[4] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083 [2]沈阳农业大学林学院,沈阳110161 [3]华南农业大学林学院,广州510642 [4]北京植物园,北京100093

出　　处：《生态学杂志》2008年第12期2087-2093,共7页Chinese Journal of Ecology

基　　金：北京市科技计划项目(D0605001040191);北京林业大学省部共建森林培育与保护教育部重点实验室课题资助项目(JD100220535)

摘　　要：于2005年5—10月,利用Granier热扩散技术对北京城市绿化树种绦柳液流速率进行连续测定,并同时监测林地光合有效辐射、风速和空气温湿度等气象因子。结果表明:绦柳液流速率具有稳定的昼夜变动规律,日变化曲线呈"宽单峰型",且晴天比阴天的昼夜差异大;绦柳月平均液流速率从5月开始升高,8月达到最大值,为0.0050cm·s-1,随后逐渐下降,10月达到最小值,为0.0013cm·s-1;与绦柳液流速率相关性最大的环境因子是光合有效辐射和空气温度,最小的是风速;绦柳每小时的耗水量与边材面积和胸径的相关性大于与树高和树冠投影面积的相关性。From May to October 2005, the sap flow velocity of greening tree species Salixrnatsudana cv.‘Pendula＇ in Beijing Botanical Garden was measured with heat dissipation technique, and the photosynthetic active radiation, wind velcoity, air relative humidity, air temperature, were determined simultaneously. The results showed that the sap flow velocity of S. matsudana varied steadily, with a diurnal variation curve of wide unimodal type, and the difference between day and night on sunny days was larger than that on cloudy days. The monthly mean sap flow velocity of S. matsudana began to increase from May, with.the maximum in August （0. 0050 cm·s^-1）, and then decreased, with the minimum in October （0. 0013 cm ·s^-1 ）. Solar radiation and air temperature were the most important factors affecting the sap flow velocity, while wind velocity was the least important one. The per hour water consumption of S. matsudana was more correlated with the sap wood area and the diameter at breast height than with the tree height and crown projection area.

关 键 词：绦柳 树干液流速率 气象因子 绿化树种 耗水 

分 类 号：S792.12[农业科学—林木遗传育种]