文献类型：期刊文献

英文题名：LONGITUDINAL VARIATION OF RING WIDTH, WOOD DENSITY AND BASAL AREA INCREMENT IN 26-YEAR-OLD LOBLOLLY PINE (PINUS TAEDA) TREES

作者：Yu, Mukui[1] Cheng, Xiangrong[1] He, Zhenxiang[2] Wu, Tonggui[1] Yin, Zengfang[3]

第一作者：Yu, Mukui

通信作者：He, ZX[1]

机构：[1]Chinese Acad Forestry, Inst Subtrop Forestry, East China Res Stn Coastal Shelter Forest Ecosyst, Fuyang 311400, Zhejiang, Peoples R China;[2]Nanjing Univ, Sch Life Sci, State Key Lab Pharmaceut Biotechnol, Nanjing 210093, Jiangsu, Peoples R China;[3]Nanjing Forestry Univ, Coll Forest Resources & Environm, Nanjing 210037, Jiangsu, Peoples R China

年份：2014

卷号：70

期号：2

起止页码：137-144

外文期刊名：TREE-RING RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000339709300008)】；

基金：This project was supported by the national agriculture science and technology achievement transformation foundation (2013GB24320618). Our thanks also go to Prof. Geoff Wang, Ms. Xiaoyan Wang and Dr. Yi Doug for their help revising the manuscript.

语种：英文

外文关键词：loblolly pine; ring width; wood density; basal area increment (BAI); longitudinal variation

摘要：Longitudinal variations in select wood quality parameters were examined in 26-year-old loblolly pine trees planted in Anhui Province, China. Wood density and ring width were measured from cross-sections of different heights of merchantable stems. The average ring width decreased from the base to 1.3 m, then increased to the maximum at 7.6 m, and thereafter reduced with stem height. The longitudinal patterns varied with cambial age in ring width. The coefficient of variation in ring widths along the stem height was greater than 21% at the cambial age 5-8 years and 9-12 years, and small variations were observed in other cambial age groups. The average wood density declined from 1.3 m to 7.6 m and then slightly increased with increasing stem height. The wood density showed great variation at different growth stages below 7.6 m, but varied less above 7.6 m. Basal area increment (BAT) gradually increased with increasing ring number (from the pith to the bark) at different stem heights, and markedly reduced after the 22nd ring. These results indicate that the longitudinal variations of wood density, ring width and BAI in loblolly pine are greatly affected by cambial age. The detailed information of the wood properties along stem heights could be useful to wood utilization of loblolly pine.