草地学报

›› 2005, Vol. 13 ›› Issue (2): 106-110.DOI: 10.11733/j.issn.1007-0435.2005.02.005

• 研究论文 • 上一篇    下一篇

水分对克氏针茅和冷蒿生殖生长的影响

张昊1, 李鑫2, 姜凤和2, 林国辉2, 杜丽华2   

  1. 1. 北京林业大学资源环境学院, 北京, 100083;
    2. 内蒙古自治区锡林郭勒盟多伦县草原工作站, 027300
  • 收稿日期:2004-12-02 修回日期:2005-03-09 出版日期:2005-05-15 发布日期:2005-05-15
  • 作者简介:张昊(1963- ),男,博士研究生,副教授,研究方向为植物生态学和草地生态学,E-mail:nmgzhanghao@126.com

Effects of Different Water Supply on the Reproduction of Stipa krylovii and Artemisia frigida Populations in Degraded Steppe

ZHANG Hao1, LI Xin2, JIANG Feng-he2, LIN Guo-hui2, DU Li-hua2   

  1. 1. College of Resource & Environment of Beijing Forestry University, Beijing 100083, China;
    2. Grassland Management Station of Duolun County, Duolun Inner Mongolia Autonomous Region, 027300, China
  • Received:2004-12-02 Revised:2005-03-09 Online:2005-05-15 Published:2005-05-15

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摘要： 研究克氏针茅(Stipa krylovii)和冷蒿(Artemisia frigida)的生殖枝数量、重量以及水分对繁殖分配与种群密度、地上生物量之间的关系。结果表明:增加水分有利于克氏针茅的生殖生长,而不利于冷蒿;增加水分时,克氏针茅繁殖分配比例随着密度和生物量的增加而呈增加趋势,但冷蒿则呈降低趋势,但随着生物量的增加二者变化不大;水分、密度和生物量的变化对克氏针茅和冷蒿繁殖分配比例均产生影响,表明两者的繁殖分配是与表型可塑性的变化密切相关,而不受遗传控制。

关键词: 水分, 克氏针茅, 冷蒿, 繁殖分配

Abstract: A study of the Stipa krylovii and Artemisia frigida populations reproductive tiller numbers and weight, and the relationship between water and the two species’reproductive allocation, pupulation densities and aboveground biomass showed that appropriate water supply could stimulate the sexual reproduction for the S.krylovii population, but not for the A.frigida one. When more water was supplied, the ratio of the reproductive allocation of S.krylovii rose with the increase of the population density and biomass, while A.frigida decreased with more water supply. However, with the growth of biomass ,there showed no significant difference between the two. Water supply, population density, and biomass affected both species in their reproductive allocation indicating that their reproductive allocations are deeply affected by the phenotypic plasticity, but not by the genetic factors.

Key words: Water supply, Stipa krylovii, Artemisia frigida, Reproductive allocation

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