Based on a systematic investigation on the predatory natural enemy community in cotton fields to the North of the Huaihe River of Anhui Province, the methods of polar ordination (PO) and fuzzy cluster analysis (FCA) were employed to study the dynamic clas
Based on a systematic investigation on the predatory natural enemy community in cotton fields to the North of the Huaihe River of Anhui Province, the methods of polar ordination (PO) and fuzzy cluster analysis (FCA) were employed to study the dynamic clas
摘要在对安徽省淮北棉田捕食性天敌群落进行系统调查的基础上，采用极点排序和模糊聚类分析方法，研究了棉田捕食性天敌群落的动态分类；采用主成分分析方法，研究了棉田捕食性天敌群落在棉花生长发育过程中演变的主要阶段。