松嫩平原假苇拂子茅无性系种群的年龄结构  

Age structure of clone population of Calamagrostis pseudophragmites in songnen plain of China

作　　者：杨允菲[1] 郑慧莹[2] 

机构地区：[1]东北师范大学草地研究所,吉林长春130024 [2]中国科学院植物研究所,北京100093

出　　处：《草业学报》2000年第3期8-13,共6页Acta Prataculturae Sinica

基　　金：国家重点基础研究发展规划项目!(Gl9990 434 0 7;95 - 2 2 - 0 2 );国家自然科学基金重点项目! (39730 1 1 0 );国家自然科学基金资

摘　　要：假苇拂子茅是典型的无性系禾草 ,分蘖节存活时间最多为 4年 ,根茎存活的时间最多为3年 ;1龄级分蘖株生产力最高 ,1龄级根茎的物质贮存能力最大。放牧场和割草场假苇拂子茅无性系种群的分蘖株均为增长型的年龄结构 ;放牧能促进 2、3龄分蘖株的形成与存活。各龄根茎的养分贮量决定于地上部分相关龄级蘖的物质生产 ;放牧扰动对假苇拂子茅无性系种群各龄级根茎的养分贮藏均有不利影响。Calamagrostis pseudophragmites is a species of typical clone grass. The oldest tiller nodes could live for four years, while the oldest rhizome for three years. Among the three age classes of the clone population the productivity of the 1 st class tillers and the capacity of storage of the 1 st class rhizomes were the largest. The age structure of tillers was of expanding type on both pastures for haymaking and that for grazing. Grazing could promote the development and survival of plants in the 2 nd and the 3 rd classes. The storage of nutrients in rhizomes was determined by the productivity of tillers in the same age class. Grazing would have negative effect on the storage of nutrients in rhizomes of all age classes. On both pastures for haymaking and that for grazing the age structure of potential clone population was of expanding type.

关 键 词：假苇拂子茅 无性系种群 营养繁殖 年龄结构 

分 类 号：S543.03[农业科学—作物学]