摘要
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。
An investigation of stand biomass and productivity was undertaken of Eucalyptus urophylla planted at spacing of 2 mx3 m in 1990 on Dongmen State Forest Farm, Guangxi Province, China. Stands in 27 plots with 20 m x 24 m each were measured, and 9 individual sampling stands from each diameter class were chosen. Regression equations for predicting biomass production were developed using functional dependence of biomass in different plant components on D2H. Mean biomass production of 10-year-old single tree and total stands were 83.86 kg and 144.85 t hm-2, respectively. Biomass distribution of all stands in different plant components was in order of stem (71.69%) >root (14.21%) >bark (7.99%) >branch (4.71%) >leaf (1.40%). Mean productivity of E. urophylla stands was 15.98 t hm-2a-1. Resulting from diameter class effect of biomass production, there was significant difference between biomass distribution and individual number in diameter classes.
出处
《热带亚热带植物学报》
CAS
CSCD
2000年第2期123-127,共5页
Journal of Tropical and Subtropical Botany
基金
国家教育部和广西区教育厅资助项目
