松嫩平原不同生境芦苇生殖分株的异速生长分析  

Allometry analysis of reproductive ramets of Phragmites australis populations from different habitats in the Songnen Plain of China

作　　者：刘秀香[1] 杨允菲[1] 

机构地区：[1]东北师范大学草地科学研究所植被生态科学教育部重点实验室,吉林长春130024

出　　处：《草业学报》2012年第4期313-318,共6页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(30970457;30770397)资助

摘　　要：通过乳熟后期大样本随机取样,对松嫩平原季节性积水的单优种芦苇群落和旱地生境羊草+芦苇群落的芦苇生殖分株数量特征进行了定量分析。结果表明,2种生境除花序长和花序生物量外,分株高、构件生物量、分株生物量、生殖生长比率和构件生物量分配间均达到显著差异。2种生境绝对数量性状中花序生物量变异系数最高,分别为57.73%和49.87%;相对数量性状中生殖分配的变异系数最高,分别为36.17%和39.44%。株高与花序长呈正相关,但与生殖生长比率呈负相关趋势。在构件生物量分配关系中,生殖分配和生产分配、生产分配和茎生物量分配均呈极显著的幂函数异速生长关系。揭示了不同生境条件下芦苇较强的调节生殖分配能力,体现了植物个体生长与生殖策略。Phragmites australis is a common species in the Songnen Plain of China.Two research habitats were chosen in this arid area.One was a single dominant species community in which,there was some seasonal stagnant water,the other was a Leymus chinensis ＋ P.australis community,growing in alkaline soil with little or no stagnant water.Large random samples taken at the end of the milk stages were quantitatively analyzed for characteristics of reproductive ramets of P.australis from these two different arid habitats.There were significant differences in ramet height,module biomass,total ramet biomass,ratio of reproductive growth and allocation of module biomass in the two habitats,but not flower length or flower biomass.In the both habitats,the variation coefficient of flower biomass was the largest in absolute quantitative characters（57.73%） in the P.australis community and in the mixed community（49.87%） while the variation coefficient of reproductive allocation was the largest in terms of relative quantitative characters（36.17% and 39.44% respectively）.There was a positive correlation between flower length and ramet height,but negative correlation between ratio of reproductive growth and rarmet height.Module biomass allocation,reproductive allocation and productive allocation,productive allocation and stem biomass allocation all showed significant allometry,which could be described by a power function（Y=βXα） regardless of habitat.P.australis populations had the best ability to regulate reproductive allocation in different habitats,reflecting the strategies of the plants growth and reproduction.

关 键 词：芦苇 生殖分株 数量特征 生物量分配 异速生长 

分 类 号：S564.2[农业科学—作物学]