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当前位置: 首页 > 文章 > 松嫩平原野艾蒿无性系种群根茎的年龄结构分析 草业学报 2004,12 (1) 21-25
Position: Home > Articles > Age structure analysis of rhizomes in a clonal population of Artemisia lavandulaefolia on the Songnen Plain of China Acta Prataculturae Sinica 2004,12 (1) 21-25

松嫩平原野艾蒿无性系种群根茎的年龄结构分析

作  者：
邢福;杨允菲
单  位：
东北师范大学草地科学研究所植被生态教育部重点实验室
关键词：
野艾蒿;无性系植物;年龄结构;根茎;松嫩平原
摘  要：
将野艾蒿的根茎划分为不同的年龄级,按长度和生物量统计了野艾蒿根茎的年龄结构,分析了各龄级根茎数量特征的变化规律。结果表明,野艾蒿无性系种群根茎的最大存活年龄为4龄,根茎年龄结构为增长型;单位长度根茎的干物质贮量以1龄级最小,并呈现随龄级的增加而不断增大的趋势;2龄级根茎对形成地上茎贡献较大;根茎长度比根茎生物量和干物质贮量具有更大的生态可塑性;生长季后期是野艾蒿根茎生长的重要时期,尤其是1龄级根茎生物量增长明显,对于实现种群更新具有重要的生态学意义。
译  名：
Age structure analysis of rhizomes in a clonal population of Artemisia lavandulaefolia on the Songnen Plain of China
作  者：
XING Fu~(1,2), YANG Yun-fei~1Grassland Science, Northeast Normal University, Changchun 130024, China; 2. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Science, Changchun 130012, China)
关键词：
Artemisia lavandulaefolia; clonal plants; age structure; rhizome; Songnen Plain of China
摘  要：
The rhizomes of A. lavandulaefolia were classified into different age classes. The age structure was characterised in terms of length and biomass. The pattern of quantitative change in rhizome numbers with increasing age was analysed. Rhizomes lived to age four at most, and the rhizome age structure was of an increasing type. Rhizome dry matter storage per unit length was least in the age one class, and increased with increasing age. The stem forming contribution of age two rhizomes was relatively high. Rhizome length had greater (ecological) plasticity than rhizome biomass and storage of dry matter. The final stage of the A.lavandulaefolia growing season was an important period for rhizome growth. In particular, the biomass increase of age one rhizomes was marked. This is of important ecological significance for population regeneration.

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