关键词: 西藏, 色季拉山, 原始冷杉林, 相对生长方程, 生物量, 分布规律

Abstract:

Based on the data collected from a standard permanent plot of a primeval Abies georgei var. smithii forest in Sejila Mountain in Tibet plateau, the biomass and its distribution were investigated by using harvest method. The results showed that the total vegetation biomass of A. georgei var. smithii forest was 424.52 t·hm^-2, of which overstory trees contributed the largest proportion (70.67%) and amounted to 300.02 t·hm^-2. The biomass of dead wood ranked the second with amount of 111.53 t·hm^-2 that accounted for 26.27% of the total biomass. The lowest proportion was in the shrub and herb layer. In the overstory layer, the biomass was allocated 19459 t·hm^-2(64.95%) to trunk, 33.96 t·hm^-2(11.33%) to bark, 20.22 t·hm^-2(6.75%) to branch, 12.39 t·hm^-2(4.13%) for leaf, and 38.48 t·hm^-2(12.85%) to root.

Key words: Tibet plateau, Sejila mountain, primeval Abies georgeivar. smithii forest, biomass, distribution, allometric equation