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.
Journal of Central South Forestry University
wood basic density