Study on Community characteristics and α Diversity under Different Grazing Intensity on Leymus chinensis(Trin.)Tzvel. Meadow Steppe of Hulunbeier

doi:10.11733/j.issn.1007-0435.2009.02.020

›› 2009, Vol. 17 ›› Issue (2): 239-244.DOI: 10.11733/j.issn.1007-0435.2009.02.020

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Study on Community characteristics and α Diversity under Different Grazing Intensity on Leymus chinensis(Trin.)Tzvel. Meadow Steppe of Hulunbeier

MENG Xu-hui^1,2, LI Xiang-lin^1,2, XIN Xiao-ping³, ZHOU Yao-zhi³

1. Department of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou Province, 730020, China;
2. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, China;
3. Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences, Beijing, 100081, China

Received:2008-08-22 Revised:2008-11-11 Online:2009-04-15 Published:2009-04-15

不同放牧强度下羊草草甸草原群落特征及多样性分析

蒙旭辉^1,2, 李向林^1,2, 辛晓平³, 周尧治³

1. 兰州大学草地农业科技学院, 兰州, 730020;
2. 中国农业科学院北京畜牧兽医研究所, 北京, 100193;
3. 中国农业科学院资源区划所, 北京, 100081

通讯作者: 李向林, E-mail:lixl@iascaas.net.cn
作者简介:蒙旭辉(1982- ), 男, 甘肃庆阳人, 硕士研究生, 研究方向为草地生态学, E-mail:mengxh02@163.com
基金资助:
公益性行业(农业)科研专项(nyhyzx07-022);国家科技支撑计划(2006BAD16B05)

Abstract

Abstract: Research on the relationship between grazing intensity and the diversity of plant communities has an important significance on reasonable grassland utilization and community stability maintenance.Through the comparison experiments with different grazing intensities,this paper studied the community characteristics,grassland productivity dynamics,and αdiversity in the Hulunbeier temperate meadow of Inner Mongolian Autonomous Region and also analyzed the correlation between productivity and diversity in order to provide a theoretical basis for the reasonable stocking rate.The results show that the community held the highest biodiversity under moderate grazing intensity.Along with the increasing of grazing intensity,the concomitant species(Potentilla bifuica L.)became the subordinate dominant species.If heavy grazing continued,L.chinensis might be replaced by P.bifuica and Carex siderosticta Hance,and then the grassland degenerated.

Key words: Meadow Steppe, Grazing Intensity, Communities, αdiversity

摘要： 研究放牧强度对群落植物多样性的影响对草原合理利用维持其群落稳定具有重要意义。通过不同放牧强度的比较试验,研究不同放牧强度下内蒙古呼伦贝尔温带草甸草原群落物种重要值的变化,并比较生产力和α 多样性指数的变化,分析生产力与多样性之间的关系,为制定合理的放牧率提供理论依据。结果表明:群落在中度放牧强度条件下能够维持较高的多样性;随着放牧强度的增加,伴生种二裂委陵菜(Potentilla bifuica)成为次优势种;如果持续过度放牧,羊草(Leymus chinensis(Trin.)Tzvel.)可能被二裂委陵菜和苔草(Carex siderosticta Hance)等杂类草代替,草场退化。

关键词: 草甸草原, 放牧强度, 群落, α多样性

CLC Number:

Q145.21

MENG Xu-hui, LI Xiang-lin, XIN Xiao-ping, ZHOU Yao-zhi. Study on Community characteristics and α Diversity under Different Grazing Intensity on Leymus chinensis(Trin.)Tzvel. Meadow Steppe of Hulunbeier[J]. , 2009, 17(2): 239-244.

蒙旭辉, 李向林, 辛晓平, 周尧治. 不同放牧强度下羊草草甸草原群落特征及多样性分析[J]. , 2009, 17(2): 239-244.

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Study on Community characteristics and α Diversity under Different Grazing Intensity on Leymus chinensis(Trin.)Tzvel. Meadow Steppe of Hulunbeier

不同放牧强度下羊草草甸草原群落特征及多样性分析

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