25年生湿地松针叶束水培无性系木材特性研究

Research on Wood Characteristics of Water Culture Clones Propagated From Needle Fascicles of 25-Year-Old Pinus Elliottii

摘要:

摘要：以25 a生湿地松针叶束水培无性系试验林为研究对象，通过生长量调查、木材纤维特性以及化学成分研究，比较分析了不同无性系之间及其与实生林木材特性之间的差异。结果表明：湿地松无性系树高、胸径和单株蓄积较实生林分别高9.10%，17.50%和50.80%；各无性系间纤维长度和纤维宽度存在极显著差异，无性系内无显著差异，纤维长度低于对照3.70%，纤维宽度高于对照约12.73%，长宽比小于对照14%；各无性系的综纤维素含量为73.05%～78.22%，木质素含量22.40%～28.82%，1%氢氧化钠抽出物含量12.30%～22.70%，均达到纸浆材材性要求；利用主成分分析法，各无性系中最优的无性系为S-4，无性系S-8和S-11综合品质较优。

Abstract:

Abstracts:25-year-old experimental stand of water culture clones propagated from needle fascicles of Pinus elliottii in Jingmen were chosen as research object.The growth amout,wood fiber properties and chemical composition were studied,and the difference of wood characteristics between water culture clones and seedling trees were also discussed.The results showed that the height,diameter at breast height and individual volume were higher 9.10%, 17.50%, and 50.80% higher than seedling trees respectively;there were extremely significant difference in fiber length and width among clones,and no significant difference among different individuals.The fiber length, fiber width and the ratio of length and width were 3.70% lower,12.73% higher and 14% less than the control,respectively.The variation range of the contents of holocellulose,the contents of lignin and the contents of 1% NaOH extractive of different clones were 73.05%～78.22%,22.40%～28.82% and 12.30%～22.70% respectively,which were in line with requirements of pulpwood qualities.Through principal component analysis,clones S-4,S-8 and S-11 were selected as the superior for pulpwood.