论文部分内容阅读
按径级标准本法测定了尾叶按（Ｅｕｃａｌｙｐｔｕｓ ｕｒｏｐｈｙｌｌａ）器官生物量，建立了林木器官干重（ｗ）与胸径和树高（Ｄ~２Ｈ）关系的相对生长方程，进而计算出尾叶桉林分的生物量和生产力。结果表明：东门林场１０年生尾叶桉人工林平均生物量为 １４４．８５ ｔ ｈｍ~-2，各器官生物量的大小序列为：干材（７１．６９％）＞根（１４.２１％）＞皮（７．９９％）＞枝（４．７１％）＞叶（１.４０％）；尾叶桉林分的平均生产力为１５．９８ ｔ ｈｍ~－２ａ~－１；由于生物量的径级效应，使林分生物量的径级分布与株数的径级分布出现显著的差异。
According to the standard of diameter grade, the relative biomass of organ of Eucalyptus urophylla was determined, and the relative growth equation of the relationship between the dry weight of forest organism (w) and DBH and height of tree height (D ~ 2H) was established, Biomass and productivity. The results showed that the average biomass of 10-year-old Eucalyptus urophylla plantations in Dongmen forest farm was 144.85 t hm -2. The order of biomass of each organ was as follows: stem (71.69%)> roots (14.21% (7.99%), branches (4.71%) and leaves (1.40%). The average productivity of Eucalyptus urophylla was 15.98 t hm ~ -2a ~ Grade effect, so that there is a significant difference in the diameter-class distribution of diameter-class distribution and number of stand biomass.