贡嘎山典型植被地上生物量与碳储量研究

采用典型样地调查和异速生长模型相结合的方法,测定了贡嘎山东坡垂直带谱上常绿与落叶阔叶混交林、针阔叶混交林、亚高山暗针叶林、高山灌丛4种典型植被类型的地上部分生物量与碳储量.结果表明,(1)随着海拔的升高,植被地上生物量呈先上升后下降的趋势,其生物量分别为:常绿与落叶阔叶混交林233.49 t/hm2、针阔叶混交林524.55 t/hm2、暗针叶林415.81 t/hm2、高山灌丛20.86 t/hm2,而相应的单株树木平均地上生物量分别为320.11 kg、1 140.78 kg、623.15 kg、11.89 kg,显示出与植被垂直带生物量相一致的变化趋势.(2)不同树木器官的含碳率中,以叶片的平均含碳率(48.25％)最高,依次为树枝(4 6.29％)、树干(4 4.65％);海拔从低到高的4个垂直带植被碳储量分别为103.60 t/hm2、245.26 t/hm2、192.99 t/hm2、9.82 t/hm2.研究认为,年平均降水量与地上生物量显著相关,是影响贡嘎山植被垂直带地上生物量分异的重要气候因子.

Aboveground Biomass and Carbon Storage of Typical Forest Types in Gongga Mountain

Based on the field investigation,some specimens and data of relative information,a catalog of wild seed plant,and the floristic of wild seed plant analyzed.The results show that:(1)There are 770 species in 261 genera and 60 families of wild seed plant in the Big Youerdosi Basin of Bayanbulak.(2)11 dominant families are Gramineae,Compositae,Leguminosae,Caryophyllaceae,Rosaceae,Brassicaceae,Cyperaceae,Ranunculaceae etc and Leguminosae,Gentianaceae,Caryophyllaceae,Gramineae are regarded as the typical families.(3)The temperate distribution occupies the overwhelming superiority.In a the Family level,temperate-type belongs to 30 families,accounting for the total number of subjects(excluding the world wide families) of 88.24%.In a grade level,the temperate distribution patterns of the 200 genera,is the total number of 97.78%.At the same time,some plant species are the most interflows between in this area and the Mediterranean,Central Asia,West Asia,little communication with East Asia and tropical.(4)There were no genera endemic to China in the area,although 55 species were China specific in the area,which 32 species endemic to Xinjiang in the area.