Biomass and yield of Betula platyphylla population in Mila Mount of Tibet

Abstract

Abstract: Mila Mount in Southeast Tibet is the west boundary of the horizontal distribution of Betula platyphlla.It is also the highest altitude area in China and the world,where Betula platyphlla is distributed.Based on the investigation of regional sample plots and the analysis of analytic trees,this paper compared the biomass and yield of Betula platyphlla population at different slope orientation and different altitude.The results showed that the growth of Betula platyphlla was greatly interfered by human activities.The yearly productivity of Betula platyphylla grown in Mila Mount was 363.1～2 072.94 kg·hm^-2,and the biomass was 7 625.00～33 167.00 kg·hm^-2,indicating that the biomass of Betula platyphlla was quite different for different population.The productivity and biomass of Betula platyphylla coppice after cutting were lower than those of seedling forest,and there existed youth broken-down in the coppice.The zonal changes of water resources had no significant effect on the water allocation and the biomass of Betula platyphylla.

Key words: High altitude, Coppice tree, Disturbance, Analytic trees, Youth broken-down

CLC Number:

S718.5

LUO Daqing, ZHENG Weilie, WANG Jingsheng, FANG Jiangping, XIN Xuebing, ZHONG Guohui. Biomass and yield of Betula platyphylla population in Mila Mount of Tibet[J]. Chinese Journal of Applied Ecology, 2004, (8): 1329-1333.

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