四合木不同种群间克隆构型及分株种群特征的比较研究

A STUDY ON CLONE ARCHITECTURE AND RAMENT POPULATION CHARACTERISTICS IN DIFFERENT POPULATION OF TETRAENA MONGOLICA MAXIM.

本文研究了鄂尔多斯高原特有植物四合木(Tetraena mongolica Maxim.)的克隆生长构型及分株种群特性,对不同种群中四合木的克隆构型及分株种群特征的可塑性进行了比较研究,初步分析了环境因子对四合木种群克隆生长的影响。结果表明:四合木具有独特的克隆生长构型:枝条遇沙埋形成长间隔物的游击型克隆生长构型和由根形成的密集型克隆生长构型,且四合木海南种群比千里山种群具有较大的分株密度、较小的平均株距及相似的分株高度;四合木克隆种群对环境表现出生态对策的高度适应性和可塑性。

The paper studied clone architecture and rarnet population characteristics of Tetraena mongolica Maxim. , a special plant of Ordos plateau; compared the clone architecture and plasticity of rarnet population characteristics between different Tetraena mongoli- ca population and analized environmental factors effect on clone growth of Tetraena mongolica The results showed ： Tetraena mongolica had special patterns of clone growth：the guerrilla pattern, which shaped long dropping branch when covered by sands and the phalanx patterns produced from roots, and compared with the Qian-Li mountain population, the Hal Nan population exhibited higher rarnet density, smaller average ramet spacing and similar rarnet height ; Tetraena mongolica clone population expressed highly adaptive and plastic ecological strategy to environment.