广西维都林场5a龄桉树生长与出材变化研究

Study on Change of Growth and Timber Outturn of 5-year-old Eucalyptus in Weidu Forest Farm of Guangxi

对广西维都林场不同地点和年份5a龄桉树生长进行研究。结果表明,不同地点5a龄桉树胸径、树高差异不显著,但蓄积、出材量及出材率差异显著;不同年份5a龄桉树胸径、树高、蓄积、出材量及出材率均达极显著差异;胸径、树高显著增大,林木出材率显著增加;5a龄桉树径阶株数分布趋向于正态分布,多数集中在11~14径阶。

Based on the study about the growth of 5-year-old Eucalyptus in different places and years in Weidu Forest Farm of Guangxi, the results were found that 5-year-old Eucalyptus in different places presented few differences on their DBH and tree height but significant difference on their stand volume, timber outturn and volume recovery; the difference of DBH, tree height, stand volume, timber outturn and volume recovery of 5-year-old Eucalyptus in different years were significant; the volume recovery in- creased significantly with the increase of DBH and tree height; the amount of 5-year-old Eucalyptus in each diameter class tended to be in a normal distribution, of which the majority belonged to 11 ~ 14 diam- eter class.