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Wood Basic Density Variation in Provenances of Exotic Loblolly Pine Grown in Jingzhou of China

XuYouming(Depement of Forestry. Huazhong Agricultural University. Wuhan 430070. P. R. China); TangWanpeng(Hutei Provincial Forestry institute); Lin Han(Huazhong Agricultural University); Wu Tianwen;Yang Xiong(Penchang Forestry Farm of Hubei Province)(Jour  
The significant difference in wood basic density was found among 21 provenances of 13-year-oldloblolly Pine grown in JingZhou of Hubei province in China. The basic density was clearly positiverelated to the latitude of these local provenances. and significantly negative to their annual meantemperature. In radial direction the basic d6nsity of individual trees within provenances increased frompith to bark. The early-late correlation coefficient of wood basic density between different growth stagesof trees was examined to be significant at 0. 001 level. The basic density of 5-year-old tree can be usedto predict that of older trees. Generally basic density was negatively correlated with height. diameter andvolume. but their correlation was not significant. Father analysis showed that the basic density in twoof these provences was positively correlated with trees groWth propefties. This should be noted in woodimprovement of exotic loblolly pine.
【Fund】: 国际科学基金!IFSD2260-2;;湖北省资助!972P0814
【CateGory Index】: S781.31
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