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本研究用相关生长法与分层割取法相结合测定的21年生日本扁柏人工林的现存量为160t/ha,生长量为16.5t/ha·a,净光能利用率为0.64%。在日本福岡地区这样的光能利用率不算高?莞鞑愕母晌镏手赜隓~2·H的相关生长关系计算了各部分的垂直分布。以太阳能多点测定计测算了林冠上部和林冠内各层太阳辐射量的季节变化。绘制了生产结构图。通过对林冠各部位叶的测定,证明了充分郁闭的日本扁柏林同日本柳杉林一样,可以区分为圆锥形、圆柱形树冠。其叶面积数和叶量密度分别为:35±5cm~2/g,495g/m~3;45±5cm~2/g,222g/m~3。以材积解析和群落生产结构、光能分布为依据论述了生产结构对光能利用的限制。
In this study, the existing biomass of 21-year-old Japanese cypress plantation was 160t / ha, its growth rate was 16.5t / ha · a and the net light energy utilization rate was 0.64%, which was determined by correlation growth method and stratified harvesting method. In Japan, Fukuoka, such a light energy utilization rate is not high? Wan Tang Tamao mother noon 镏 hand 赜 镏 ~ 2 · H related growth relationship calculated the vertical distribution of each part. The multi-point solar energy meter measures the seasonal variation of solar radiation in the upper canopy and canopy within each layer. Draw the production structure. Through the determination of the leaves of various parts of the canopy, it was proved that, like the Japanese cedro-coniferous forest, the full-closed canopy forest can be divided into conical and cylindrical canopies. The leaf area and leaf densities were 35 ± 5cm 2 / g, 495g / m 3, 45 ± 5cm 2 / g and 222g / m 3 respectively. Based on volume analysis and community production structure and light energy distribution, the limitations of light energy utilization of production structure are discussed.