呼伦贝尔和松嫩草原某些大针茅群落分类的判别分析  

Discriminatory Analysis of Classification of Stipa grandis Communities in Hulunbeir Grassland and Songnen Graasland

作　　者：王昱生[1] 丁金海[1] 朱国江 

机构地区：[1]东北农学院畜牧系

出　　处：《草业学报》1990年第1期17-25,共9页Acta Prataculturae Sinica

摘　　要：目前,我国草原生态学术界对呼伦贝尔草原大面积连续分布的大针茅群落和松嫩草原片断分布的大针茅群落是否同属于一个植被类型有两种观点,以致在确定松嫩草原植被类型和植被区划上持有不同意见.本文对内蒙古呼伦贝尔草原偏中生化的大针茅(Stipa grandis)+羊草(Leymus chinensis)+冰草(Agropyron cristatum)+糙隐子草(Clestogenes squarrosa)群落和东北松嫩草原典型的大针茅+糙隐子草+杂类草群落采用多元线性判别函数和判别值(DV)计算,得出结论:这两个地区大针茅群落分类的分界值(R_0)等于255.7262,前者的判别值变动在315.6789～332.8052;后者的判别值变动在170.7133～209.7671,前者 DV>R_0,后者 DV<R_0,两者差别显著,不属于同一群落类型.不能将松嫩草原存在大针茅群落,就将该草原区定为典型草原.此项研究结果可为松嫩草原正确的植被分类和植被区划提供依据.At the present time,there are two views on whether Stipa grandis community is distrib- uted widely in Hulunbeir grassland or in only one of the fragmentary distribution in Songnen grassland or those two are having the same vegetation type in the academic field of grassland ecology,so that there were heating arguments existing in respect to the determination of vegetation type and regionalism of vegetation in Songnen grassland,Stipa grandis communi- ties of these regions were studied deeply by means of the analysis of numerical classification in order that we may obtain the conclusive and classificatory evidences of vegetation types and determine which vegetations they belong to. In this paper,the characteristics of community structure and eco-geographic distribu- tion of Stipa grandis communities in these regions were discussed.Using the methods of nu- merical classification,we mainly calculated both the multivariate linear discriminate func- tion and discriminate values of the two-group quadrates of Stipa grandis communities in these regions.On the basis of discriminatory analysis,we are able to come to the conclusion that,from the point of view of vegetation type,the Stipa grandis communities in Songnen grassland are different from the same community in Hulunbeir grassland even if there is an- other Stipa grandis community which trends to mesophyzation in Stipa grandis formation in this grassland.Ro of these two communites equals to 255.7262 and DV of Stipa grandis com- munity in Hulunbeir grassland in Songnen grassland ranges from 170.7133 to 209.7671, whereas in the former is DV>RO,and in the latter,DV<Ro.Therefore,we will be in a position to make an objection against defining Songnen grassland as‘Steppe’,but quite agree with defining the same grassland as‘Meadow Steppe’.The result in advance in the pa- per can furnish conclusive evidence to a certain reasonable vegetational classification in Songnen grassland.

关 键 词：呼伦贝尔草原 松嫩草原 大针茅群落 判别分析 

分 类 号：S8[农业科学—畜牧兽医]