Decay distribution in relation to pruning and growth stress in plantation-grown Eucalyptus regnans in New Zealand.
Decay distribution in relation to pruning and growth stress in plantation-grown Eucalyptus regnans in New Zealand.
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新西兰人工林桉树的腐烂分布与修剪和生长胁迫相关。
DOI：
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发表时间：
1989
影响因子：
1.5
通讯作者：
J. A. Griffith
中科院分区：
文献类型：
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作者：
B. Glass;H. Mckenzie;J. A. Griffith
在新西兰，为了生产锯木和贴面原木，在管理桉树种植园时采用了修剪；然而，内部腐烂可以通过修剪过的树枝存根进入。在15个破坏性取样的regnans F. Mueller桉中观察到沿髓的纵向运动，以及向髓的径向运动，但在修剪后的木材中没有发现向外的衰变。桉树在修剪时的枝径修剪准则得到了支持。桉树的三个核心区域是可区分的-衰变核心，缺陷核心和脆心核心。在E. regnans中，决定核心最终直径的可能不是内部腐烂或修剪过的枝干，而是易碎的心脏。修剪的时间和频率所涉及的造林权衡意味着，未来的研究将需要关注修剪后的树枝存根的阻塞，内部腐烂的传播模式，以及一种快速而简单的方法来检测直立树木的脆性心脏。
Pruning has been adopted in managing eucalypt plantations for sawlog and veneer log production in New Zealand; however, internal decay can gain entry through pruned branch stubs. Longitudinal movement of decay along the pith was observed in 15 destructively sampled Eucalyptus regnans F. Mueller, as was radial movement towards the pith, but no decay was detected outwards into wood laid down after pruning. Eucalypt pruning guidelines with respect to branch diameter at time of pruning were supported. Three core zones are distinguishable in eucalypts — the decay core, the defect core, and the brittle heart core. In E. regnans, brittle heart rather than internal decay or pruned branch stubs will probably determine the ultimate diameter of the central core. The silvicultural trade-offs involved in the timing and frequency of pruning mean that future research will need to focus on occlusion of pruned branch stubs, patterns of spread of internal decay, and a quick and simple means of detecting brittle heart in standing trees.