退化羊草草原物种变化与生产力的关系  

Study on the Relationship between Species Variation and Productivity of Different Degraded Plant Communities on Leymus chinensis

作　　者：梁燕[1] 韩国栋[2] 周禾[1] 

机构地区：[1]中国农业大学动物科技学院,北京100094 [2]内蒙古农业大学生态环境学院,呼和浩特010019

出　　处：《草地学报》2007年第6期531-536,共6页Acta Agrestia Sinica

基　　金：国家自然科学基金重点项目(30360022);国家自然基金项目(30440051)

摘　　要：对内蒙古赤峰市克什克腾旗达里诺尔自然保护区境内的羊草(Leymus chinensis(Trin.)Tzvel.)草原进行野外生态学调查及相关数据统计分析,探讨其植物多样性与地上现存量的关系,从而进一步明晰二者之间的作用模式;在此基础上,应用逐步聚类分析方法定量划分出不同退化程度的草地区域范围;研究各群落内的物种变化,及其对群落生产力的影响。结果显示:不同退化程度植物群落的地上现存量与Shannon-Wiener指数之间均呈显著一元线性正相关(P<0.05),表明在研究区域的小尺度范围内,随着生物多样性的上升,系统生产力也呈上升趋势,且群落的地上现存量与Shannon-Wiener指数之间有较好的回归模拟关系。The relationships between biodiversity and standing aboveground biomass in L. chinensis steppe ecosystem and its interaction model were investigated and clarified according to an experiment of field ecological investigations carried out on a Leyrnus chinensis （Trin.） Tzvel. steppe in Dalinuoer natural reserve area, Keshiketeng Banner of Chifeng, Inner Mongolia. The grasslands were classified quantitatively into areas with different degradation degrees based on the plant community characteristics~ the variations of species among treatments and their influences on community productivities were studied. The results show that the relationships between standing aboveground biomass and Shannon-Wiener index were positively linear among each treatment （P（0.05）, and a preferable correlative simulation between standing biomass and Shannon-Wiener index in experimental area was established.

关 键 词：羊草草原 植物群落 退化程度 物种变化 群落生产力 

分 类 号：S812.6[农业科学—草业科学]