草地学报

›› 2000, Vol. 8 ›› Issue (4): 267-272.DOI: 10.11733/j.issn.1007-0435.2000.04.005

• 研究论文 • 上一篇    下一篇

华北农牧交错带草原—农田群落空间演变机制的研究

王堃   

  1. 中国农业大学草地研究所, 北京 100094
  • 出版日期:2000-11-15 发布日期:2000-11-15
  • 基金资助:
    国家重点攻关项目96-016-04-01资助课题

Study on space evolvement mechanism of grassland and field community in ecotone between agriculture and animal husbandry in north China

Wang Kun   

  1. Institute of Grassland Science, China Agriculture University, Beijing 100094
  • Online:2000-11-15 Published:2000-11-15

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摘要： 研究结果表明,从农田—天然草地群落的空间演变表现出-定的规律,即植物群落可明显聚为三类:农田群落、交错群落和天然草地群落;群落多样性指数(香农H′)、丰富度指数(R1、R2)、均匀度指数(E1)及物种数量均表现出由低→高→低的变化规律。人类的频繁扰动(耕作)导致土壤理化性状的变化,作物的强烈生长又抑制了-些草原植物的生长,是天然草地—农田群落空间演变的主要原因。

关键词: 草原, 农田, 群落, 演变, 交错带, 相似系数

Abstract: The research results indicate that:It shows a certain law that space evolvement from grassland to field community. All plant community can be clustered three kinds:field community、ecotone and grassland community; biodiversity index H′, Richess index R1、R2, evenness index and spices number all show a common change law from low to high then to low. The disturbance of human cause a change of soil, but the growth of grass was restrained by crop growth strongly this is the main reason for community evolvement from grassland to field.

Key words: <Keywords>Grassland, Field, Community, Evolvement, Ecotone, Similarity coefficient