西藏米拉山白桦种群生物量和生长量研究

应用生态学报 ›› 2004, Vol. ›› Issue (8): 1329-1333.

西藏米拉山白桦种群生物量和生长量研究

罗大庆, 郑维列, 王景生, 方江平, 辛学兵, 钟国辉

西藏高原生态研究所, 林芝 860000

收稿日期:2003-05-20 修回日期:2003-12-24
通讯作者: 罗大庆,男,1969年生,助理研究员,主要从事森林生态研究工作,发表论文10余篇.Tel:0894-5822655-804、13989044655;E-mail:dqluo0894@163.com
基金资助:
全国森林生态网络体系建设“十五”项目(2002BA516A1616);西藏自治区科技厅资助项目

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

LUO Daqing, ZHENG Weilie, WANG Jingsheng, FANG Jiangping, XIN Xuebing, ZHONG Guohui

Institute of Tibet Plateau Ecology, Linzhi 860000, China

Received:2003-05-20 Revised:2003-12-24

摘要/Abstract

摘要： 在区域样地调查基础上,通过解析木分析,比较了不同坡向、不同海拔的白桦种群生物量和生长量.结果表明,米拉山白桦种群的生产量约在363.1～2 072.94 kg·hm^-2·年^-1之间;各种群的现存生物量在7625.00～33 167.00 kg·hm^-2之间,种群间生物量差异显著.砍伐后的白桦萌生木、生物量和生长量均小于实生木,并且在生长过程中出现早衰的现象,表明人类活动的干扰对白桦种群有较大影响.米拉山东、西坡不同海拔生境条件下,水分地带性的变化对白桦各器官内的水分分配以及生物量组成没有显著影响.

关键词: 高海拔, 萌生木, 干扰, 解析木, 早衰

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

中图分类号:

S718.5

罗大庆, 郑维列, 王景生, 方江平, 辛学兵, 钟国辉. 西藏米拉山白桦种群生物量和生长量研究[J]. 应用生态学报, 2004, (8): 1329-1333.

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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