工业林木荷木材化学成分及其变异的研究

按照国家木材化学成分分析标准，对工业林木荷木材化学成分进行了测定，结果表明12年生和14年生木荷木材化学成分含量为：热水抽提物6．93％和5．06％；1％NaOH抽提物18．42％、17．42％；苯醇抽提物1．64％、2．48％；纤维素48．06％、50．72％；多戊糖20．99％、20．68％；木质素24．20％、23．10％；pH值为5．46和4．99。以上7个指标在树干不同高度的差异均未达到显著性水平。而热水、苯醇抽提物含量和pH值在两树龄间的差异达到1％显著水平，1％NaOH抽提物和主要化学成份含量的差异不显著。

Study on the chemical component and variation of wood Schima wallichii under plantation

According to the national standard of P.R. China for wood chemical component analysis, contents and its variation of the chemical components of S. wallichii plantation was analyzed. The contents of every chemical components from 12 years and 14 years： hot--water extractives are respectively 6.930% and 5.060% ;10% NaOH extractives 18.42%, 17.42 %benzone. ethanol extracuves 1.64 % 2.48% =the contents of cellulose 48.06 %, 50.72%the contents of pentosan 20.99 %, 20.680% the contents of lignin 24.200%, 23.100% %and that pH value of wood is 5.46 and 4.99. The variation level of the 7 chemical characterstic value at the different tree heights is not significant in statistic sense, but the difference of the contents under the different tree-age woods, hot-water extractives, benzene, ethanol extractives and pH value of wood arrived 1% significance level, the difference of the contents among 1% NaOH extractives and important chemical components is not significant.