文献类型：期刊文献

英文题名：Branch Occlusion and Discoloration under the Natural Pruning of Mytilaria laosensis

作者：Qin, Guoming[1,2] Hao, Jian[3] Yang, Jinchang[1] Li, Rongsheng[1] Yin, Guangtian[1]

第一作者：Qin, Guoming

通信作者：Yin, GT[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Nanjing Forestry Univ, Inst Forestry, Nanjing 210037, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 536000, Guangxi, Peoples R China

年份：2019

卷号：10

期号：10

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000498395600069)】；

基金：This study was financially supported by the Guangdong Forestry Science and Technology Innovation Project (2016KJCX004) and the Science Foundation of Experiment Center of Tropical Forestry, Chinese Academy of Forestry (RL2011-04).

语种：英文

外文关键词：knot properties; wood defects; clear wood; mixed model

摘要：The production of knot-free and high-quality wood can be a vital issue in silviculture and forest management. In this study, knot properties, branch occlusion, and wood discoloration were investigated in an 11-year-old Mytilaria laosensis plantation in Guangxi, China, to examine the effectiveness of natural pruning in reducing knot-related defects. A total of 1513 occluded branches from 20 trees were sampled and dissected. Occluded branches were most common at heights of 2-6 m, and the mean diameter of the occluded branches gradually increased with height from the base to 6 m. Linear and generalized linear mixed-effect models were developed to reveal the relationship between branch occlusion and discoloration. The mortality of branches was highest in the third and fourth year and it took roughly three to six years to occlude. The mixed-models indicated that the branch occlusion time was positively correlated with the occluded branch diameter and dead branch stub length, and negatively correlated with the stem radial increment during branch occlusion. Branch discoloration was positively correlated with the occluded branch diameter and branch occlusion time, and was negatively correlated with the branch angle. The probability of wood discoloration also increased with the branch occlusion time. Our findings contribute to a better understanding of the spatiotemporal allocation and internal characteristics of occluded branches, and provide a reference for growing high-quality M. laosensis wood.