Acta Agrestia Sinica

›› 1999, Vol. 7 ›› Issue (3): 252-257.DOI: 10.11733/j.issn.1007-0435.1999.03.012

Previous Articles    

Element Composition of Nostoc commune and Xanthoparmelia camtschadalis under Grazing Pasture and Their Relations with Stocking Rates

Li Xiangzhen1, Niu Haishan1, Sun Tiejun2, Chen Zuozhong1   

  1. 1. Institute of Botany, Chinese Academy of Sciences, Beijing, 100093;
    2. Institute of Natural Resources, Inner Mongolian University, Huhhot, 010021
  • Online:1999-08-15 Published:2012-07-19

地耳和地衣的化学元素组成特点及其与放牧率的关系

李香真1, 牛海山1, 孙铁军2, 陈佐忠1   

  1. 1. 中国科学院植物研究所, 北京, 100093;
    2. 内蒙古大学自然资源研究所, 呼和浩特, 010021
  • 基金资助:
    中国科学院重大项目(KZ951-A1-301)和特别支持项目(KZ95T-04)及内蒙古草原生态系统定位站开放站基金

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Abstract: Element contents and proportions of soluble elements in Xanthoparmelia camtschadalis(Ach.)Hale and Nostoc commune,and relationships of element contents in lichen with stocking rates were investigated in a pasture of Ieymus Chinensis steppe.The results indicated that:both in lichen and Notoc commune,C,N and Ca concentrations are high level,>1%;P,Mg K,Fe concentrations are middle level,between l to 0.1%;Na,Mn,Cu,Zn,and B concentrations are low level,<0.1%.The soluble N in Nostoc commune account for 21 % of total N.With stocking rates increasing,C concentration decreased,meanwhile N increased.C/N ratio is smaller in moderate and heavy grazing treatments.The contents of Ca、Mg、K、Fe、Mn、Cu inlichen are lower in control,and higher in grazing treatments.P,Na,Zn and B contents are higher in treatments of control,hight and extremely grazing intensity.

Key words: Xanthoparmelia camtschadalis(Ach.)Hale, Nostoc commune, Stocking rates, Element composition

摘要： 本文研究放牧草原中地衣和地耳的化学元素组成特点、水溶性元素形态所占的比例以及地衣的元素含量与放牧率的关系。结果表明,地衣和地耳的C、N、Ca含量较高(>1%);P、Mg、K、Fe含量中等(0.1-1%),Na、Mn、Cu、Zn、B含量较低(<1%)。地耳中水溶性N占全N的21%。放牧区C含量下降,N含量提高,C/N比在中牧和重牧区较低。Ca、Mg、K、Fe、Mn、Cu与放牧率的关系表现为不放牧(对照)区较低,放牧处理较高。P、Na、Zn、B含量则表现为不放牧(对照)、轻牧和重牧区较高。

关键词: 地耳, 地衣, 放牧率, 元素组成