关键词: 古树, 形态特性, 树高, 胸径, 新梢年生长量, 树叶稀疏, 枯枝比例, 树洞

Abstract: [Objective] The objective of this study was to provide theoretical basis for ancient and famous trees maintenance in Northern China through analyzing the geographical variation base on the investigating results of the morphological characteristics.[Method] ANOVA and least significant difference (LSD) was used to analyze the variance of seven morphological characters of 5 kinds ancient trees which distributed in six sites.[Results] The results indicated that variance existed among 7 indicators of 5 species.Tree holes showed the largest degree of variance.By contrast,tree height,diameter at breast height (DBH) and leaves sparse situation showed the least degree of variance,which indicated that these traits were the most stable.Morphological characters such as tree height,leaves sparse,deadwood rate present negative correlation with the soil nutrient.[Conclusion] Morphological characteristics of ancient trees in Northern China varied and influenced by environment factors.Therefore,those ancient and famous trees could adapt easily.

Key words: ancient trees, morphological characteristics, trees height, diameter at breast height, annual length of spring shoot, leaves distribution, deadwood proportion, tree hole