文献类型：期刊文献

英文题名：Branch development in monoculture and mixed-species plantations of Betula alnoides, Erythrophleum fordii and Pinus kesiya var. langbianensis in southwestern China

作者：Liu, Kai-Li[1,2] Wang, Chun-Sheng[2] Chen, Bo-Yao[2] Wang, Rui-Hui[1] Zeng, Jie[2]

第一作者：Liu, Kai-Li

通信作者：Wang, CS[1]

机构：[1]Cent South Univ Forestry & Technol, Changsha 410004, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China

年份：2023

卷号：528

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20224713149826);Scopus(收录号：2-s2.0-85142124130);WOS:【SCI-EXPANDED(收录号:WOS:000896909400007)】；

基金：Acknowledgments This work was financially supported by the National Natural Science Foundation of China (31972949) . Moreover, we would like to thank the anonymous reviewers for their comments and suggestions on the manuscript.

语种：英文

外文关键词：Branchiness; Mixed forests; Morphological variation; Branch quantity; Plasticity

摘要：The quantitative and morphological characteristics of branches are key factors influencing both tree growth and wood quality. The effects of stand density and artificial pruning on branch development have been widely studied in monoculture, while branch development in mixed forests has rarely been reported. In this study, branch development of Betula alnoides, Erythrophleum fordii and Pinus kesiya var. langbianensis were evaluated in a 6-year-old mixed-species trial plantation in Yunnan Province, China, which included five treatments: mono-cultures of B. alnoides, E. fordii and P. kesiya var. langbianensis, and mixtures of B. alnoides with E. fordii or P. kesiya var. langbianensis. Branch quantity (number, proportion, and density), morphology (diameter, length, and angle), and distribution (height and orientation) were measured from 63 dominant or codominant trees randomly sampled in the trial plantation. The results showed that the number of live and total branches of B. alnoides in the mixture was significantly higher than those in its monoculture, and the branch density of B. alnoides in the mixture with P. kesiya var. langbianensis was also higher than those in its monoculture and the mixture with E. fordii. Mixing with B. alnoides had no significant effect on the branch quantity of P. kesiya var. langbianensis, but significantly lowered the branch quantity of E. fordii. The branch angle was not significantly affected by the mixture for these species. More small branches (branch diameter < 15 mm) were observed in the mixed plantations than in the monocultures for the three species, while significantly lower branch diameter and length were seen in the mixture than in the monoculture only for B. alnoides. Significant differences were absent in the branch distribution of B. alnoides and E. fordii among the four cardinal orientations regardless of whether they were in the monoculture or in the mixture. The variations in branch quantity and morphology along the stem were much more determined by species-specific attributes and less affected by the mixture. It was concluded that a mixture of B. alnoides and E. fordii could significantly control the branch size of B. alnoides, reduce both the branch size and branch quantity of E. fordii, and thus be beneficial for high-quality timber production.