Biomass and yield of Betula platyphylla population in Mila Mount of Tibet
Luo, D.; Zheng, W.; Wang, J.; Fang, J.; Xin, X.; Zhong, G.
Ying Yong Sheng Tai Xue Bao 15(8): 1329-1333
2004
ISSN/ISBN: 1001-9332 PMID: 15573982 Document Number: 575779
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 363.1apprx2 072.94 kg.hm-2, and the biomass was 7 625.00apprx33 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.