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

Abstract 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 spacing on radial growth wood properties. Spacing significantly affected tree-ring width basic density ( p < 0.05) but not traits. highest diameter at breast height (1.3 m) was in 6 m × 3 8 spacings, respectively. However, no significant differences width, traits observed among sampling directions discs taken 1.3 each spacing. Growth rings pith tree heights had effects anatomical characteristics, highlighting obvious temporal-spatial variations. Pearson correlation analysis showed a negative relationship density, length positive hemicellulose. There with cellulose lignin contents. Based comprehensive assessment by TOPSIS method, recommended producing similar sites future.