【摘要】 通过对二代实生与萌芽杉木生长特性的比较分析 ,结果表明 :二代杉木实生和萌芽的树高、胸径和材积生长差异在树高生长上表现最为明显 .实生的树高快速生长期较长 ( 7a左右 ) ,有明显转折年龄 ( 7年生时 ) ,生长速度下降幅度较大 ,出现凸型线形 ,随后生长速度比较平缓 ;萌芽的快速生长期极短 ,无明显转折年龄 ,整条曲线接近平直型 .实生和萌芽生长差异最大值为1 0 a左右 ,1 0 a后萌芽和实生生长量的差异逐渐缩小 .更多还原

【Abstract】 The growth characteristics of seedling and sprouting trees in a second rotation Chinese fir plantation were analyzed. The results showed that among increments of tree height, DBH and volume of seedling and sprouting trees in a second rotation Chinese fir plantation, the growth difference of tree height is the most distinct. In a seedling tree, tree height high speed growth period is quite long (about 7 years) with a distinct turning age (seven year old) when growth speed declines by a big margin and then becomes stable soon afterward and appears a convex growth curve. In a sprouting tree, the high speed growth period is very short with no distinct turning age, and the growth curve is nearly smooth. At age 10, the growth difference between seedling and sprouting trees is the greatest and diminishing later.更多还原