木荷与杉木人工林林冠截留初步探讨

Initial Probe into the Crown Intereeption of Artificial Schima superba & Fir Forest

本文通过对建瓯木荷和杉木人工林林冠截留的观测,分析了二者林冠截留差异及其与降水的关系。研究表明木荷林的年截留量为379.04mm,平均截留率是21.96%,杉木林的年截留量为259.54mm,仅为木荷林的68.5%,平均截留率是16.31%,比木荷林低5.65%。两林分截留率大小随降雨特征变化存在较大差异。在雨季,木荷林的截留能力明显高于杉木林;随雨量的增大,两者的截留量与截留率的差异有增加趋势,这主要与两种林分结构特征的不同有关。

By examining canopy interception in plantations of Schima superba （SS） and Chinese fir （Cunninghamia lanceolata, CF） in Jianou, Fujian. This paper studied the differences of canopy interception between two species and their correlation with precipitation. The results showed that annual canopy interception and annual mean canopy interception rate of SS were 379.04mm and 21.96% respectively. Compared with the SS, canopy interception of CF was 259.54mm,which account for 68.5% of SS＇ s, mean canopy interception rate was 16.3%, which was 5.65% lower than SS＇ s . The variation of interception rates between SS and CF was affected by rainfall characteristics. In the rainy season,interception capability of SS is much higher than that of CF. When the rainfall peaks, the discrepancy of interception between the two species culminate, so does their interception rate, largely due to their different stands structure characteristic.