关键词: 毛竹, 碳密度, 碳贮量

Abstract:

Density, storage and spatial distribution of carbon in Phyllostachy pubescens forest were studied by means of sample plot. Carbon density of different bamboo organ ranged from 0.468 3 to 0.5210 g·g^-1, which was in order as follow: root>trunk>underground trunk>branch>underground stem>leaf. The organ distribution of carbon storage was 50.97for trunk,19.79 for root and 4.87for leaf. The total carbon storage in bamboo ecosystem was 106.362 t·hm^-2, of which the above-ground green vegetation stored 34.231t·hm^-2,accounted for 32.18 ,and the forest floor and soil(0～60 cm horizon) stored 72.131 t·hm^-2,account for 67.82. Annual carbon fixation of tree story in bamboo forest was 5.097 t·hm^-2a^-1, which was 1.46 times of Chinese Fir at the fast growing stage, and 1.33 times of tropical mountain rain forest. Compared with traditional practice, after 10-year intensive management, total carbon storage in the bamboo ecosystem declined 8.133 t·hm^-2, however, the net annual carbon fixation of tree story appeared an increase of 0.589 t·hm^-2a^-1.

Key words: Phyllostachy pubescens, Carbon density, Carbon storage