中文摘要：

以红椿天然林分为研究对象,选取11个红椿天然林分,研究其木材基本密度、心材比率和心材颜色等变异规律以及木材材性性状与生态环境因子的关系。结果表明：红椿木材基本密度、心材颜色和心材比率等性状在不同林分间差异达到极显著差异;木材材性性状在天然林分内也存在丰富的变异,其中心材颜色变异系数较大,其遗传改良潜力较大;红椿天然林分木材基本密度和心材颜色与纬度、年降水量和海拔高度显著相关,而心材比率与年降水量极显著负相关;来自低纬度和低经度的红椿天然林分其木材基本密度、心材颜色和心材比率等性状表现较为优异。

英文摘要：

Eleven natural stands were selected for study in distribution area of T. ciliata. Our objective was to elucidate the variation pattern of wood basic density, heartwood ratio and heartwood color of T. ciliata between and within natural stands, as well as effect of environmental factors on these traits. The results show that the difference of wood basic density, heartwood color and heartwood ratio between natural stands was significant. The variation of these traits within natural stands was rich. The variation coefficient of heartwood color was the largest, this indicated that the genetic improvement potential of heartwood color was great. The wood basic density and heartwood color were positive correlated with latitude, annual precipitation and altitude, but the heartwood ratio was significantly negative correlation with annual rainfall. Natural stands of T. ciliata from low latitude and low longitude had better wood basic density, heartwood ratio and heartwood color.