Morphology and ecological significance of intra-annual radial cracks in living conifers

被引:38
作者
Cherubini, P
Schweingruber, FH
Forster, T
机构
[1] Swiss Federal Institute for Forest, Snow and Landscape Research (WSL)
来源
TREES-STRUCTURE AND FUNCTION | 1997年 / 11卷 / 04期
关键词
dendroecology; wood anatomy; Picea abies; radial cracks; frost drought;
D O I
10.1007/s004680050078
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Intra-annual radial cracks were studied on 294 cross-sections of Norway spruce sampled at two forest sites in the eastern Alps (Italy) and from seven isolated trees in the Jura region (Switzerland). Cracks were occasionally accompanied by traumatic resin canals in the wood that was formed after the cracking. Most of the cracks, however, were without such canals. Traumatic resin canals are not significantly more abundant in tree rings formed after cracking, and their occurrence is not related to the cracking. Cracks developed when the cambium was inactive. Water imbalances during the early spring, due to transpiration losses and inadequate moisture supply from very cold roots, are the likely cause of these cracks.
引用
收藏
页码:216 / 222
页数:7
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