云南哀牢山中山湿性常绿阔叶林生物量的初步研究

PRELIMINARY STUDIES ON THE BIOMASS OF MIDDLE-MOUNTAIN MOIST EVERGREEN BROADLEAVED FORESTS IN AILAO MOUNTAIN, YUNNAN

中山湿性常绿阔叶林是云南省亚热带山地植被垂直带的主要类型，其中分布在哀牢山上的木果石栎、景东石栎、腾冲栲林（Ｌｉｔｈｏｃａｒｐｕｓｘｙｌｏｃａｒｐｕｓ、Ｌ．ｃｈｉｎｔｕｎｇｅｎｓｉｓ、Ｃａｓｔａｎｏｐｓｉｓｗａｔｔｉｉｆｏｒｅｓｔ）尤其具有代表性。本文用收获法、相关曲线法测定并估算了该群落近熟林和成过熟林的生物量与年平均净积累量，结果分别为５０８．５７ｔ／ｈｍ２，１２．１０５１ｔ／（ｈｍ２·ａ）；２９３．０４ｔ／ｈｍ２，７．７４４３ｔ／（ｈｍ２·ａ），对产生差异的原因作了分析。林分的叶面积指数分别为１０．０４和８．９６。文中还提出了群落乔木优势种各器官生物量估测的回归模型，并从生物量的角度阐明建群种在群落中的地位。

The middle-mountain moist evergreen broadleaved fotest is the major forest type in the vertical vegetation zone of subtropical mountains. Its typical representative is the forests in Ailao Mountain, dominated by Lithocarpus, xylocarpus, L. chintungensis and Castanopsis wattii. The biomass and mean annual net accumulation for the pre-matured and the matured or over-matured forest communities were estimated through harvesting and correlation. The results show that the biomass was 508.57t·hm-2 and 293.04t·hm-2 in the prematured and the matured or over-matured forests, respectively. Mean annual net accumulation was 12.1051 tons·hm-2. a-1 and 7.7443 t·hm-2. a-1, respectively. The causes for the differences were also analyzed. The leaf area index (LAI) of the two forest stands were 10.04 and 8.96, respectively. The regression models by wlhich the biomass of different organs of dominant tree apecies in the community was estimated were established. The status of constructive species in the Communities was also explained in the light of biomass production.