桤木优良造纸材改良潜力研究

Study on the improved potential of fine pulpwood Alnus cremastogyne Burk

对桤木优树树高、胸径、材积、单株纤维量、纤维长、纤维长宽比、纤维含量、木材密度的变异规律和各性状间的相关关系进行了研究。结果表明:性状变异系数规律是生长性状大于材性性状;各性状间没有显著相关,各性状可独立改良;材积、纤维含量、木材密度对单株纤维量的贡献率分别为67.47%、17.02%、15.51%;各性状的改良潜力是:材积可达1倍以上,胸径48%,树高18%,木材密度可提高10%以上,纤维含量可提高4%以上,纤维长度、长宽比分别可提高7%、12%以上,生长与材性联合改良的效益在30%以上。

The research was based on changing and relationship in each character of Alnus cremastogyne Burk including： tree height, diameter ,volume ,the amount of plant fibers ,fiber length and fiber aspect ratio ,fiber content, wood density： The results showed that the law is the coefficient of variation： characters growth traits than wood properties in characters changing coefficients. No significant correlation between the characters. The characters can be modified independently. The volume fiber contents and wood density for rate of the plant capacity were 67.47 %, 17.02%, 15.51%. The traits of potential improvements were growth 100% in volume,48 % in diameter, 18% in height,and more than 10% in wood density,more than 4% in fiber content,7% in fiber length and 12% in fiber aspect ratio. The benefit effect were more than 30 % in unit improvement of growth and wood properties.