Responses of radial growth, wood density and fiber traits to planting space in poplar plantations at a lowland site  

作　　者：Yanhua Zhang Shengzuo Fang Ye Tian Linlin Wang Yi Lv 

机构地区：[1]College of Forestry,Nanjing Forestry University,Nanjing,210037,People’s Republic of China [2]Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing,210037,People’s Republic of China

出　　处：《Journal of Forestry Research》2022年第3期963-976,共14页林业研究（英文版）

基　　金：The work was supported by the National Key Research and Development Program of China(Grant Number 2016YFD0600402).

摘　　要：Poplar is raw material for various panel, paper and fiber products. The 12 sample trees of clone Nanlin-895 from four spacings were destructively harvested after thirteen growing seasons to assess the influence of spacing on radial growth and wood properties. Spacing significantly affected tree-ring width and wood basic density (p < 0.05) but not fiber traits. The highest diameter and wood basic density at breast height (1.3 m) was in 6 m × 6 m and 3 m × 8 m spacings, respectively. However, no significant differences in tree-ring width, wood basic density and fiber traits were observed among the four sampling directions in discs taken at 1.3 m for each spacing. Growth rings from the pith and tree heights had significant effects on wood basic density and fiber anatomical characteristics, highlighting obvious temporal-spatial variations. Pearson correlation analysis showed a significantly negative relationship of tree-ring width to wood basic density, fiber length and fiber width, but a significantly positive relationship to hemicellulose. There was no relationship with cellulose and lignin contents. Based on a comprehensive assessment by the TOPSIS method, the 6 m × 6 m spacing is recommended for producing wood fiber at similar sites in the future.

关 键 词：Planting density Growth ring Fiber morphology Chemical composition Temporal-spatial variation 

分 类 号：S792.11[农业科学—林木遗传育种]