【摘 要】
：
通过单位面积取样的方法,测定分析了新疆伊犁2种生境下大拂子茅(Calamagrostis macrolepis)种群分蘖株、根茎和潜在种群的年龄结构,旨在探索大拂子茅种群对不同生境条件的响
【机 构】
：
伊犁师范学院化学与生物科学学院,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
论文部分内容阅读
通过单位面积取样的方法,测定分析了新疆伊犁2种生境下大拂子茅(Calamagrostis macrolepis)种群分蘖株、根茎和潜在种群的年龄结构,旨在探索大拂子茅种群对不同生境条件的响应策略,揭示大拂子茅种群的繁殖潜力.结果表明:大拂子茅种群分蘖株在2种生境下均由营养分蘖株和生殖分蘖株组成；分蘖株、根茎、冬性苗和芽均有4个龄级；根茎分蘖节最多繁殖4个世代,最多可存活5个生长季；分蘖株数量和生物量为1龄＞2龄＞3龄＞4龄；芽数量为0龄＞1龄＞2龄＞3龄,以0龄芽占绝对优势；根茎生物量、冬性苗数量在2种生境样地也具有低龄级相对占优势的结构特征.2种生境下大拂子茅种群分蘖株、根茎、冬性苗和芽等构件均呈增长型年龄结构.
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