Asynchronous wood formation in youngAcacia mangium planted in Malaysia
Asynchronous wood formation in youngAcacia mangium planted in Malaysia
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马来西亚种植的马占相思幼苗的异步木材形成
DOI：
10.1007/bf00767283
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发表时间：
2002
影响因子：
2.9
通讯作者：
M. H. Sahri
中科院分区：
文献类型：
--
作者：
Y. Ogata;T. Nobuchi;M. Fujita;M. H. Sahri
一般来说，热带树木的年轮不太明显。即使这些树有一些同心结构，关于它们形成的时间信息也很少。本报告的目的是通过观察不明显的环状结构来说明木材的异步形成。对马来西亚的幼龄芒果相思进行了木材异步形成的解剖学和宏观观察。每隔一周测量28棵树的树高和胸径。从四棵树的木圆片取样在胸高为这项研究。采用薄片和软X射线摄影方法，研究了不同径向方向导管尺寸和形成层细胞数量的径向变化以及不连续带的木材解剖结构。即使对于具有相似半径的四个径向方向，血管尺寸在其径向变化中也是完全不同的。马占相思形成层细胞数量在径向上存在较大的变异。低密度带包括一层螺旋状排列的血管，而不是封闭的圆形。
In general, tropical trees have less-distinct growth rings. Even if the trees have some concentric structures, there is little information on the timing of their formation. The objective of this report is to show the asynchronous wood formation from the observation of indistinct, ring-like structures. YoungAcacia mangiumplanted in Malaysia was investigated for asynchronous wood formation anatomically and macroscopically. Tree heights and girths at breast height for 28 trees were measured every other week. Wood disks from four trees were sampled at breast height for this research. The radial variation of vessel dimensions and the number of cambial cells in different radial directions and the wood anatomy of discontinuous bands were investigated using thin sectioning and soft radiographic methods. The vessel dimension was quite different in their radial variation even for four radial directions with a similar radius. There was a large variation in the number of cambial cells among radial directions in youngAcacia mangium. Bands of low density included a layer of vessels aligned in a spiral rather than in a closed circle.