青藏高原丽江大黄某些生态学特性的研究  

Studies on certain ecological characteristics of Rheum likiangense in Yushu,Qinghai

作　　者：谢宗强[1] 

机构地区：[1]中国科学院植物研究所植被数量生态学开放研究实验室,北京100093

出　　处：《生态学报》2000年第5期815-819,共5页Acta Ecologica Sinica

基　　金：国家重点基础研究发展规划资助项目!( G2 0 0 0 0 4 860 0 );中国科学院重大资助项目!( KZ951 -A1 -2 0 2 )

摘　　要：丽江大黄 ( Rheum likiangense)主要分布于四川青藏接壤的石灰岩山地 ,垂直分布范围在海拔 3 50 0～ 4 40 0 m,处在高寒灌丛草甸和山地寒温性针叶林带。其种群分布格局在大于 1 .5m2尺度上为集群格局 ;在小于 1 .5m2的尺度上 ,为随机分布。丽江大黄光合速率日变化在晴天呈现出典型的单峰曲线 ,与低海拔平原区植物明显不同。这主要缘于在植物生长季节 ,高原的光和温的互相补偿作用能使光反应和暗反应协调进行 ,有利于光合作用。其土壤 P的含量远低于根茎和叶 ,Fe含量则为土壤 >根茎 >叶 ,其中 ,根茎与叶相差不大 ,但它们与土壤相差 50～ 1 1 0倍 ;Ca、Na、Mn、Cu的含量表现为土壤 >叶 >根茎。Rheum likiangense was distributed in a limestone region from alt.3500 to 4400 meters and the contiguous area of Sichuan,Qinghai and Tibet.It belongs to a high cold scrub meadow zone and montane cold temperate coniferous forest zone.The spatial distribution pattern of Rheum likiangense population showed contagious when the sampling scale was greater than 1.5m 2 and random when less than 1.5m 2.Daily variation of net photosynthesis rate of the plant showed typical mono peak curve,differing from that of plants in plains at low altitudes,because the compensation of light and temperature in the plateau was helpful to the net photosynthesis of plants in growing season.For Rheum likiangense ,P content in soil was lower than that in both leaves and rhizomes,and Fe content fitted soil>rhizomes>leaves,without significant difference between rhizomes and leaves.Ca,Na,Mn and Cu contents appeared soil>leaves>rhizomes.

关 键 词：丽江大黄 分布 光合速率 生态学 

分 类 号：Q948.1[生物学—植物学]