Shoot structure and dynamics of saplings and canopies of three deciduous broad-leaved trees of a coppice forest in central Japan
Shoot structure and dynamics of saplings and canopies of three deciduous broad-leaved trees of a coppice forest in central Japan
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日本中部矮林三种落叶阔叶树幼苗和冠层的芽结构和动态
DOI：
10.1007/pl00009764
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Hori
中科院分区：
文献类型：
--
作者：
H. Ozawa;K. Itoh;Y. Hori
日本中部矮林的主要组成成分是三种落叶阔叶树：齿叶栎、栗树和疏花鹅耳枥。研究了三个树种幼树和冠层的新梢伸长和出叶方式。Q. serrata和C.冠层上层和幼树冠层的锯齿状突起相同。这两个种的第二次枝都是在第一次枝伸长后形成的。疏花区系在幼树和冠层上层之间存在差异。在树苗中，只有第一个芽需要很长时间才能伸长。在上层冠层中，高阶枝的形成方式与其他两个物种相同。在冠层下层，三种植物的枝伸长模式相同，只有第一枝伸长较短，且伸长持续时间较短。叶片寿命、单株叶面积、单位叶面积叶重和单位茎长茎重均高于对照。laxiflora显著短于或显著小于Q. serrata和C.钝齿。单位叶面积的茎长与单位叶面积的茎长呈负相关。疏花类是Q的3倍。serrata和C.钝齿。C. laxiflora是高效的，因为它发生在小的叶面积上。对C.疏花类比藜类更适合伸长生长。serrata和C.钝齿。此外，还比较了3种植物的枝梢结构，并对3种植物的生态学特性进行了讨论。
Three deciduous broad-leaved trees,Quercus serrata,Castanea crenataandCarpinus laxiflora, were the main constituents of a coppice forest in central Japan. The shoot elongation and leaf emergence modes of both saplings and the canopy of the three species were investigated. The shoot elongation modes ofQ. serrataandC. crenatawere the same in saplings and the upper layer of the canopy. The second shoots of these two species were formed after the first shoots were elongated.C. laxiflorawas different between saplings and the upper layer of the canopy. In saplings, only the first shoots took a long time to elongate. In the upper canopy layer, higher order shoots were formed in the same way as in the other two species. In the lower layer of the canopy, all three species showed the same shoot elongation mode, in which only the first shoot and its duration of elongation was short. Leaf longevity, individual leaf area, leaf mass per unit leaf area and the stem mass per unit stem length ofC. laxiflorawere significantly shorter or significantly smaller than those ofQ. serrataandC. crenata. The length of the stem per unit leaf area of C. laxiflora was three times that ofQ. serrataand five times that ofC. crenata. The elongation growth ofC. laxiflorawas highly efficient as it occurred with a small leaf area. The shoot dynamics and the shoot structure ofC. laxifloraare more suitable for elongation growth than inQ. serrataandC. crenata. Furthermore, the shoot structures of the three species were compared and ecological characteristics of the three species are discussed.