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作 者 ：梁宇,高玉葆,任安芝,陈世苹,刘宁,刘爽

期 刊 ：生态学报 2000年 20卷 1期 页码：80~87

关键词：黄柳；沙地生境；枝长频度分布(当年枝)；分枝系统；叶形态；

Keywords:Salix gordejevii, sandy land habitat, frequency distribution of shoot lengths （first year shoots）, branching system, leaf morphology,

摘 要 ：对分布于3种不同沙地生境(半固定沙丘、固定沙丘、丘间低地)黄柳灌丛的个体形态、生长和群体数量特征进行了比较研究,同时测定了灌丛下草本层植物种类组成及频度。结果显示:分布于丘间低地的黄柳灌丛当年枝平均长度增加缓慢,短枝条的比例较高,枝长频度分布(当年枝)峰值偏左,分枝也较多,叶片短而狭,长宽比大;与之相比,分布于半固定沙丘上的灌丛当年枝平均长度增加较快,长枝条比例较高,枝长频度分布趋于正态分布,分枝较少,叶片长而宽,长宽比小;固定沙丘上灌丛的上述特征大致介于二者之间,其枝长频度符合Weibull分布。3种生境条件下黄柳灌丛下草本层的种类组成频度也存在差异。

Abstract:Plant morphology,growth and population characteristics of S.gordejevii in different sandy land habitats (semi fixed sand dunes,fixed sand dunes and inter dunes lowland),as well as species composition and their frequency in the herb layer of the scrubs,were compared.Plants in the inter dunes lowland were more branchy with a larger number of first year shoots which were shorter,and grew more slowly;the frequency distribution of the first year shoot lengths tended to have a "thin" peak drifting toward...

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