农业科学研究2012，Vol.33Issue(1)：25-30,6.
宁夏荒漠草原不同坡位群落特征研究
Study on the community characteristic in different slope locations on desert steppe in Ningxia
摘要
Abstract
The characteristic of desert plant community in different habitat were studied by taking desert steppe in Yanchi Count of Ningxia Province as an example. The line transect method used to survey the vegetation in the field. Using PCA（principal components analysis） ordination to analyze the components of communities in slope scale. The results showed that the components of communities did not change significantly. After a long time of fencing,the proportion of fine varieties of herbage increased, community structure had improved. Dominant species from Cynanchum komarovii, Artemisia sacrorum to Stipa bungeana, Leymus secalinus, Lespedeza davurica. The percentage of indicator organism such as Cynanchum komarovii, Oxytropis aciphylla decreased obviously. Vegetation types were clearly differentiated in slope scale, different slope locations bring about vegetation differentiation.关键词
荒漠草原/不同生境/植物群落Key words
desert steppe/different hatitat/community分类
生物科学引用本文复制引用
魏乐,宋乃平,方楷..宁夏荒漠草原不同坡位群落特征研究[J].农业科学研究,2012,33(1):25-30,6.基金项目
国家自然科学基金资助项目 （）
