冀北山区天然林黑桦材性与生长特性相关性研究

Correlation Between Wood Properties and Growth Characteristics of Natural Betula dahurica in Mountaineous Area of Northern Hebei

为探究黑桦生长特征和材性指标之间的关系,以冀北山区阴坡与半阴坡黑桦天然次生林为对象,从生长特性、解剖特性、物理力学特性方面研究其相关特征。结果表明:1)半阴坡黑桦的胸径、树高、材积生长量高于阴坡黑桦,存在显著差异。2)除顺纹抗压强度外,阴坡黑桦其他物理力学性能均优于半阴坡黑桦,且存在显著性差异。3)黑桦生长特性与解剖特性之间相关性较大;生长特性与物理力学特性之间相关性较小,但与基本密度、顺纹抗压强度相关度较高;基本密度与解剖特性和力学特性之间相关性较大。

Betula dahurica is one of the main secondary tree species in the mountainous area of northern Hebei.In order to explore the relationship between its growth characteristics and physical properties,in this paper,the natural secondary forests of B.dahurica on the shady slope and half shady slope in the northern mountainous areas of Hebei Province were taken as the research object,the relevant characteristics were studied in terms of growth characteristics,anatomical characteristics,physical and mechanical characteristics.The results showed that 1)the DBH,tree height,and volume growth of the trees on the half shady slope were higher than those growing on the shady slope with significant differences.2)In addition to the compressive strength along the grain,other physical and mechanical properties of the trees on the half shady slope were superior to those on the shady slope with significant differences.3)The correlation between growth characteristics and anatomical characteristics was significant.Little correlation was found between growth characteristics and physical and mechanical characteristics,except that the basic density and the compressive strength along the grain were highly correlated.The basic density had a higher correlation with anatomical and physical and mechanical properties.