文献类型：期刊文献

英文题名：Radial Variation of Wood Anatomical Properties Determines the Demarcation of Juvenile-Mature Wood in Schima superba

作者：Wang, Yunpeng[1,2] Zhang, Rui[1,2] Zhou, Zhichun[1,2]

第一作者：王亚萍;Wang, Yunpeng

通信作者：Zhang, R[1];Zhang, R[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[2]Zhejiang Prov Key Lab Tree Breeding, Hangzhou 311400, Peoples R China

年份：2021

卷号：12

期号：4

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000643021000001)】；

基金：This study was supported by Zhejiang Provincial Natural Science Foundation of China (grant No. LQ19C160002), the Special Fund for Breeding New Varieties of Forest Species in Zhejiang Province (grant No. 2016C02056-3), the Science and Technology Innovation Project in Jiangxi Province (grant No. 201919) and the Sixth Stages of Planting and Seedling Science and Technology of Fujian Province (grant No. 201906).

语种：英文

外文关键词：wood anatomy; broadleaf tree; radial variation; fiber; vessel; mature wood; Schima superba

摘要：Schima superba is a precious broadleaf tree species that produces excellent timber. Analyzing the radial variation of wood anatomical properties within stems and determining the boundary between the juvenile and mature wood can provide a theoretical basis for the breeding and cultivation of S. superba. Herein, 30 54-year-old trees were used to analyze the radial variation of wood anatomical properties qualitatively. The correlation among wood properties was analyzed. On this basis, four types of model were used to predict the wood properties quantitatively, and the optimal segmentation model was used to determine the boundary between juvenile and mature wood. The results showed that the variation of the early stage (before the 20th year) was larger than that of the later stage (after the 20th year); moreover, the variation of the vessel features (9.56%) was greater than that of the fiber features (7.42%), the vessel lumen diameter (11.94%) and the fiber length (8.00%) had the most variation. There were three radial variation patterns in the wood properties. In the early stage, there was a significant positive correlation between the ring width and wood air-dry density (0.78) and wood basic density (0.89), and a significant negative correlation between the ring width and the fiber characters (-0.79 similar to-0.93) and vessel characters (-0.64 similar to-0.90). The growth models of Logistic and Richards were more suitable (R-2 = 84.2%similar to 95.2%) for the radial variation of wood anatomical properties than the nonlinear least square model (R-2 = 67.7%similar to 90.9%). The transition wood between juvenile and mature wood of S. superba was from the 11th to the 16th year based on aggregative indicators from the pith to bark at breast height. Finally, when taken together, the wood anatomical properties of S. superba had regular radial variation. Breeding programs need to consider both growth and wood anatomical properties in the early stage, but they can be neglected in the mature stage. The formation of mature wood of S. superba occurred after the 16th year.