摘要
选取贡嘎山区３５种主要植物群落，对它们的垂直分布与水分、温度条件进行了分析。结果表明，贡嘎山区水分条件较好，温度条件是植物群落垂直分布的限制因子，亚高山针叶林，针叶阔叶混交林，常绿阔叶林的分布上限，其温暖指数，生物学温度分别为８－１２１，４０，６０－６８（℃·月）和３．０－３．５，６．５－７．０，９．０－１０．０（℃）。
the Gongga Mountain is the highest mountan in the Hengduan Mountain System. the mainpeak is at an altitude 7 556m,The bioclimatic condition is complicated and the vertical vegetationbelts are complete,The vertical vegetatfon belts on the east slope are classified as everg reenbroadleaved forest belt(1 600 2 200m),mountain coniferous and broadleaved mixed forest belt(2 200─2 500m) , subalpine coniferous forcat belt( 2 500─3 600m),and alpine bush andmeadiw belt(3 600─4 600m)。Using Kira' s warmth index WI,coldness index CI and Holdridge' s biotemperature BT,poten-tlal evapotranspiration rate PER, the relationship between distribution of the 35 main speciesformations and climatic condition in Gongga Mountainous Region is discussed in this article, Theresult shows that the upper limit of fir and spruce forest and its second forest is in WI = 8.0─12.0℃·month and BT = 3.0 3.5℃; the boundary between subalpine coniferous forest andconiferous and broadleaved mixed forest is in WI = 40.0℃·month and BT=6.5─7.0℃;thelower limit of the evergreen broadleaved forest is in WI = 80.0℃·month and BT=12.0℃;thevalley shnib is in WI=90.0℃·month and BT≥12.5℃
出处
《山地研究》
CSCD
1994年第4期201-206,共6页
关键词
贡嘎山区
植物群落
温暖指数
气候
Gongga Mountainous Region,species formation,warmth index,biotempe rature
