文献类型：期刊文献

英文题名：Inter- and intra-growth ring variations of wood carbon fractions in Pinus tabuliformis

作者：Wei, Yupei[1,2] Zheng, Chang[1,2] Ma, Lingyu[1,2] Jiang, Xiaomei[1,2] Yin, Yafang[1,2] Guo, Juan[1,2]

第一作者：Wei, Yupei

通信作者：Guo, J[1];Guo, J[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Wood Collect WOODPEDIA, Beijing 100091, Peoples R China

年份：2024

卷号：78

期号：3

起止页码：137-147

外文期刊名：HOLZFORSCHUNG

收录：;EI(收录号：20240815575820);Scopus(收录号：2-s2.0-85187209031);WOS:【SCI-EXPANDED(收录号:WOS:001162416600001)】；

基金：We would like to thank Haopeng Yan and Zhaohui Luo from the Research Institute of Wood Industry, Chinese Academy of Forestry for their invaluable support in the laboratory. We are also grateful to Yonggang Zhang and Yu Guo from the Research Institute of Wood Industry, Chinese Academy of Forestry for their assistance with field work.

语种：英文

外文关键词：carbon fraction; earlywood and latewood; juvenile wood; mature wood; Pinus tabuliformis

摘要：Carbon fraction (CF) of trees is essential for quantifying forest carbon (C) stocks. Considerable attention has been paid to CF variations at various levels with the exception of inter- and intra-growth rings. Herein, the inter- and intra-growth ring variation of CF in Pinus tabuliformis was investigated. Elemental analysis was performed to obtain CF values of the earlywood and latewood in each growth ring of the xylem. Patterns of CF variation at the growth ring level were evaluated using mixed-effect models. The results showed that latewood CF, 50.6 %, was significantly higher than earlywood CF, 49.9 % (p < 0.01). In particular, inter-growth ring variations of CF differed between heartwood and sapwood, as well as between juvenile wood and mature wood. CF values decreased nonlinearly with cambium age toward the heartwood or juvenile wood, with estimated least-squares means of 50.4 % and 51.8 %, respectively. While CF values were almost unaltered in sapwood, and slightly decreased in mature wood, with estimated least-squares means of 50.0 % and 50.2 %, respectively. It indicates that patterns of CF variation between juvenile wood and mature wood are important to estimate the C stock of P. tabuliformis. This research provides insights into C uptake dynamics to support forest management and wood utilization.