| 呼伦贝尔草甸草原不同退化程度羊草群落指标研究 |
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| 引用本文： | 乌仁其其格,武晓东,闫瑞瑞.呼伦贝尔草甸草原不同退化程度羊草群落指标研究[J].干旱区资源与环境,2009(3). |
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| 作者姓名： | 乌仁其其格 武晓东 闫瑞瑞 |
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| 作者单位： | 内蒙古农业大学生态环境学院;中国农业科学院呼伦贝尔草原生态系统国家野外科学观测研究站;呼伦贝尔学院生命科学与化学学院; |
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| 基金项目： | 中国农业科学院呼伦贝尔草原生态系统国家野外科学观测研究站开放课题《呼伦贝尔草甸草原不同退化程度下植被与土壤因子指示度研究》资助 |
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| 摘 要： | 本试验对放牧干扰下不同退化程度呼伦贝尔草甸草原羊草群落进行研究。结果发现,随着退化程度的增加,群落的平均高度、地上生物量及植物群落α多样性指数均表现出降低的趋势。各物种的重要值变化幅度很大,建群种羊草的重要值在重度退化区高于轻度退化区。随着退化程度的增加,羊草群落伴生种的重要值降低,一些耐践踏、适口性差的物种增加,一、二年生植物的重要值也呈现出增加的趋势。通过研究表明,可用群落的平均高度和地上生物量、物种α多样性指数和重要值作为放牧干扰下确定不同退化程度的植物群落学指标。
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| 关 键 词： | 呼伦贝尔草甸草原 羊草群落 群落特征 α多样性指数 重要值 |
Studied on the Indications of Leymus chinensis Communities under Different Degree of Degradation in Hulunbuir Meadow |
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| Uranqiqige,,WU Xiao-dong,YAN Rui-rui.Studied on the Indications of Leymus chinensis Communities under Different Degree of Degradation in Hulunbuir Meadow[J].Journal of Arid Land Resources and Environment,2009(3). |
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| Authors: | Uranqiqige WU Xiao-dong YAN Rui-rui |
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| Institution: | 1.College of Eco-Environmental Sciences;Inner Mongolia Agricultural University;Hohhot 010019;2.Ecosystem National Observatory System of Hulunbeier Grassland;Chinese Academy of Agricultural Science;Hulunbeier 021008;3.College of Life Science and Chemistry;Hulunbuir University;Hulunbuir 021008;China |
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| Abstract: | The community average height and above-ground biomass decreased with the increasing of degeneration degree.The plant community α-diversity indexes also displayed a declining trend.There were very big change in species importance values.The importance value of Leymus chinensis in the serious degenerated area was higher than that in the slight degenerated area.The companion species importance values of Leymus chinensis community decreased with the increasing of degeneration degree,but the importance value of some trample tolerance species,bad palatability species and annual-biennial plants were increasing.The research indicated that community average height,above-ground biomass,plant community α-diversity indexes and the importance values may take as the plant community indications to determine different degeneration degree of grazing disturbance. |
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| Keywords: | Hulunbuir meadow Leymus chinensis community community characteristics α-diversity indexes importance value |
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