作　　者： ; ; ; ;

机构地区： 广西生态工程职业技术学院生态工程系

出　　处： 《贵州农业科学》 2013年第1期23-26,共4页

摘　　要： 为给食用土当归资源保护与开发利用提供参考,对食用土当归的4个自然居群样地进行了群落调查,列出了部分物种的重要值,并计算了Margalef丰富度指数,Shannon-Wiener多样性指数和Pielou均匀度指数。结果表明:食用土当归有3种自然居群结构,样地1、4分别为2种不同的自然居群结构,样地2、3为同一自然居群结构,样地4由于长画眉草个体数量较大,导致均匀度指数降低,长画眉草为该群落中的建群种。样地2、3的植被为绣线菊+星毛鸭脚木+映山红/鹿蹄橐吾+食用土当归+鱼眼草+鹅肠菜+鼠麴草的群落结构类型,海拔为1 320～1 490m,成土母岩是花岗岩,壤土,荒草地,土壤湿度大。样地2、3的食用土当归生长旺盛,植株生长势强、地茎粗,且盖度大、肥嫩,食用土当归为该群落草本层优势种,这2个样地为食用土当归的理想生境。 In order to provide references for investigations of A. cordata in natural community ascertained, and indexes of Margalef abundance, calculated. The results show that there are three conservation and exploitation of A. cordata, quadrat were carried out, importance value of some species were Shannon-Wiener biodiversity and Pielou evenness were coenotypes of A. cordata. Quadrat 1 and 4 belong to different coenotype but quadrat 2 and 3 are similar. Due to possession of the largest individual number, Eragrostis pilosa is the establishing species in quadrat 4, which result in the decline of evenness index. Vegetation in quadrat 2 and 3 is composed of Spiraea salicifolia, Schefflera minutistellata, Rhododendron simsii , Ligularia sibirica , Aralia cordata , Dichrocephala auriculata , Myosoton aquaticum, Gnaphalium a f fine, etc. As the dominant species in herb layer of the community of quadrat 2 and 3, A. Cordata growing in fertile loam soil meadow in elevation between 1 320- 1 490 meters, has exuberant growth potential, with a big herbage coverage, which indicates that the two quadrat are ideal habitat for it.

关 键 词： 食用土当归 生态群落 群落类型 丰富度 多样性 均匀度

领　　域： [农业科学] [农业科学]