Surface area of woody organs of an evergreen broadleaf forest tree in Japan and Southeast Asia
Surface area of woody organs of an evergreen broadleaf forest tree in Japan and Southeast Asia
复制标题
日本和东南亚常绿阔叶林木本器官表面积
作者：
T. Yoneda
以常绿暖温带和热带森林常绿阔叶树的地上木质器官总表面积与单侧叶面积之比（U/Ac）为研究对象，分析了常绿阔叶树的构型。随着dbh的增加，U/Ac有减小的趋势。在暖温带森林和热带雨林之间，每类的比例范围几乎没有差别。在相同大小的树木中，较大树木的比例与其相对生长速度（胸径）相关。不管森林类型如何，冠层树木倾向于在某个比率值时停止生长，阈值约为1.5。阈值表明，树木木质器官的年呼吸作用几乎消耗了所有的剩余产量。在管道模型的基础上，利用比值考虑理想的最大树高，在热带雨林和暖温带森林中分别估计为110 m和70 m。
Architecture of evergreen broadleaf trees in evergreen warm-temperate and tropical forests was analyzed with a ratio (U/Ac) of total surface area of aboveground woody organs to leaf area (one-sided surface area) of each felled tree. The ratio,U/Ac, tended to decrease with the increasing ofdbh. There was little difference in a range of the ratio at eachdbh class between a warmtemperate forest and a tropical rainforest. The ratios of larger trees correlated with their relative growth rates ofdbh among similar sized trees. Canopy trees tended to stop their growth at some value of a ratio, a threshold value being about 1.5, irrespective of forest types. The threshold value showed the critical condition that annual respiration of woody organs of a tree consumed nearly all surplus production. On the basis of the pipe model, an ideal maximum tree height was considered with the ratio, and was estimated at 110 m and 70 m in a tropical rainforest and a warm-temperate forest, respectively.