Dependency of cone production on tree dimensions in Abies mariesii
Dependency of cone production on tree dimensions in Abies mariesii
复制标题
冷杉球果产量对树木尺寸的依赖性
作者：
T. Seki
研究了发育完好树冠的冷杉球果产量与树体大小的相关性。一棵树在过去8年中产生的球果总数和最大球果数都与树干最低活枝直径的平方(DB2值)存在异速生长关系。最近17年在主枝轴上产生的球果数与1979、1969或1959年形成的轮生轴下方树干直径的平方呈正相关，而与DB2值没有发现这种关系。一个树枝上产生的球果的数量受树枝直径的平方限制。我认为球果的数量是由球果产生的邻近树干和树枝中积累的干物质的量来调节的，而不是由树中的全部干物质来调节的。关键词：冷杉，球果生产，树木尺寸，树干直径，树枝直径。
Dependency of cone production on tree dimensions was examined in Abies mariesii trees that had developed undamaged crowns. The total and maximum numbers of cones produced by a tree for the last 8 years both had allometric relationships with the square of the trunk diameter just below the lowest living branch (DB2). The estimated number of cones produced during the most recent 17 years on the main branch axes showed a positive correlation with the square of the trunk diameter just below the whorl developed in 1979, 1969, or 1959, while no such relationship was found with DB2. The number of cones produced on a branch was constrained by the square of the branch diameter. I suggest that the number of cones is regulated by the amount of dry matter accumulated in the neighboring trunk and branches where the cones are produced rather than the whole amount of dry matter in the tree. Key words: Abies mariesii, cone production, tree dimensions, trunk diameter, branch diameter.