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应用生态学报 ›› 1996, Vol. 7 ›› Issue (3): 280-282.

• 研究论文 • 上一篇    下一篇

不同时间草地火烧后群落地上生物量结构的变化

周道玮, 祝玲, 张宝田   

  1. 东北师范大学国家草地生态工程实验室, 长春130024
  • 收稿日期:1994-08-09 修回日期:1995-09-25 出版日期:1996-07-25 发布日期:1996-07-25
  • 基金资助:

    国家“八五”重点科技攻关项目

Structural dynamics of aboveground biomass of communities on Songnen grassland after different burning time

Zhou Daowei, Zhu Ling, Zhang Baotian   

  1. National Laboratory of Grassland Ecological Engineering, Northeast Normal University, Changchun 130024
  • Received:1994-08-09 Revised:1995-09-25 Online:1996-07-25 Published:1996-07-25

摘要: 不同时间草地火烧后,群落地上生物量结构发生不同程度的变化,最明显的是火烧地各层没有立枯体组分,未烧地立枯体随季节推迟逐渐转向下层.火烧地茎矮化,各层段叶生物量皆高于未烧地,未烧地各层段茎叶比例高于火烧地.火烧地的光线通透系数高于未烧地.

关键词: 草地, 火烧, 生物量, 群落, N沉降, 养分释放, 细根分解, 根径

Abstract: The structure of aboveground biomass of communities on Songnen grassland is changed in yaring degrees after different burning time.On burned plot,the litter is removed;but on unburned one,it is gradually transfered to the lower layer of the community.The stem is dwarfed on burned plot and its leaf biomass is greater;but on unburned plot,the ratio of stem to leaf is higher.The penetration coefficient of light is higher on burned plot than on unburned one.

Key words: Grassland, Burning, Biomass, Community, nutrient release, nitrogen deposition, fine root decomposition, root diameter