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应用生态学报 ›› 1997, Vol. 8 ›› Issue (6): 571-574.

• 研究论文 • 上一篇    下一篇

松嫩平原光稃茅香无性系种群的营养繁殖特征

杨允菲1, 李建东1, 郑慧莹2   

  1. 1. 东北师范大学国家草地生态工程实验室,长春 130024;
    2. 中国科学院植物研究所,北京 100093
  • 收稿日期:1996-11-13 修回日期:1997-04-21 出版日期:1997-11-25 发布日期:1997-11-25
  • 基金资助:

    国家自然科学基金资助项目(39770536)

Vegetative propagation characters of clonal populations of Hierochloe glabra in Songnen Plain

Yang Yunfei1, Li Jiandong1, Zheng Huiying2   

  1. 1. National Laboratory of Grassland Ecological Engineering, Northeast Normal University, Changchun 130024;
    2. Institute of Botany, Academia Sinica, Beijing 100093
  • Received:1996-11-13 Revised:1997-04-21 Online:1997-11-25 Published:1997-11-25

摘要: 光稃茅香是典型的无性系禾草.分蘖节可繁殖2个世代,最多存活3个年度.根茎最多存活2个年度.无性系种群的分蘖株和根茎均有2个龄级,并均以1龄级占较大比重.无性系潜在种群由冬性苗和根茎芽所组成.以潜在种群的数量估计,在割草场混生群落中将保持现有的地位和作用,在放牧场的优势种群落中将增强其地位和作用.

关键词: 光稃茅香, 无性系种群, 根茎, 分蘖节, 营养繁殖, 年龄结构, 根系活力, 秋华柳, 金属元素, 镉胁迫

Abstract: Hierochloe glabra is a typical clonal grass.Its tiller nodes can propagate two generations.The tiller nodes can survive at most for three years,and the rhizomes for two years.There are two age classes in both tiller and rhizome populations,and the first age class constitutes the majority.The potential clonal populations consist of winterness seedlings of tiller and rhizome buds. It is estimated by the numbers of the potential clonal population that the grass would keep its existing positions and roles in the mixed communities of hay making plots,and would enhance itself as a dominant species in the communities of grazing plots.

Key words: Hierochloe glabra, Clonal population, Rhizome, Tiller node, Vegetative propagation, Age structure, metal elements., cadmium stress, Salix variegata, root vigor