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Difference Analyses of Tracheid Morphological Characteristics Among Provenances of Exotic Loblolly Pine in Southern Districts of Henan Province in China
Author(s): 
Pages: 15-20
Year: Issue:  5
Journal: JOURNAL OF NANJING FORESTRY UNIVERSITY(NATURAL SCIENCE EDITION)

Keyword:  火炬松种源试验管胞形态特征;
Abstract: 在河南省进行的1983年耐寒火炬松、1984年一般火炬松两批种源试验结果表明:(1)种源间木材管胞长度、宽度、直径、壁厚、腔径比、长宽比、壁腔比等7个性状特征的差异多不显著,种源内7个性状个体间的变化大于种源间差异;(2)火炬松种源原产地地理气象因子与上述7个特征相关分析显示仅管胞长度、长宽比存在着微弱的地理变异模式;(3)两批种源年轮宽度与管胞长度、长宽比、壁厚、壁腔比呈微弱的负相关,与管胞直径、管胞宽度、管胞腔径比呈不同程度的正相关.基本密度与管胞宽度、直径呈负相关,与壁厚、壁腔比呈正相关,年轮宽度与其对应的基本密度呈显著的负相关,说明种源生长快或种源内个体生长快的原因除细胞分裂速度快、细胞数目增加外,很大程度上可归因于管胞直径、管胞宽度的增加,而胞壁厚度却没有相应地按比例增加,导致了木材密度减小.因此,应对工业建筑用材材质改良引起重视.
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