摘要
对栓皮栎种群的地理分布和生物学、生态学特性进行了研究 ,结果表明 :( 1 )栓皮栎幼苗期地上部分生长缓慢 ,而主要发育根系 ;( 2 )栓皮栎的有性生殖和无性生殖都受到人为干扰的强烈影响 ;无性繁殖在林分更新中占有重要的地位 ,而有性繁殖则是维持和丰富种群遗传多样性的基础 ;( 3)栓皮栎喜光 ,但对温度、降雨和土壤要求并不严格 ;( 4 )通过对优势种群重要值进行聚类分析 ,可以将陕西栓皮栎种群所在群落划分为 6个类型 ;( 5 )栓皮栎具有很强的适应性 ,是我国分布最广的树种之一 ,垂直分布幅度范围较大 ,分布的海拔上限自北向南 。
The study was made on the geographical distribution and biological and ecological property of Q.variabilis population.The results showed that:(1) Q.variabilis had strong fitness and was one of the most widely distributed trees;the altitude spectrum varied greatly and the upper limit increased from north to south,and from east to west;(2) the over ground part of the seedling grew slowly while the root system developed quickly;(3) the sexual and asexual reproduction of Q.variabilis were significantly influenced by human disturbance and asexual reproduction played an important role in the forest renewal while the sexual reproduction was the basis of genetic diversity maintenance and abundance;(4) Q.variabilis was sunny plant and didnt specially require the temperature,rainfall and soil condition;(5) through the Cluster Analysis of Importance Value of dominant populations,the communities that Q.variabilis inhabited could be divided into 6 types.
出处
《西北植物学报》
CAS
CSCD
2002年第5期1093-1101,共9页
Acta Botanica Boreali-Occidentalia Sinica
基金
杨凌专项基金
西北农林科技大学重点基金
国家重点基础研究项目 (G2 0 0 0 /860 6)资助
关键词
陕西
秦巴山区
栓皮栎种群
生物学生态学
地理分布
Quercus variabilis population
biological and ecological property
Shaanxi
Qinba mountain
geographical distribution
