运用PPR方法探讨星天牛与公园植物群落之间的关系

本研究运用投影寻踪回归（ＰＰＲ）方法对上海市７个样地的实际调查数据进行分析。结果表明：星天牛对寄主的危害率与寄主及周围植物的密度有密切关系。通过模拟试验，可寻求星天牛发生发展与植物群落之间的数量关系。从而为园林部门对星天牛进行综合治理，制定符合经济及生态规律的管理方案以及园林设计，提供了科学依据。

An Initial Investigation on Anoplora Chinensis (Fonsten) and the Plant Community in Parks

With the method of Projection Pursuit Regression(PPR),we analysed the date collected from seven sample spots in Shanghai.The results of study indicates that the lost extent to trees caused by Anoplopora Chinensin(Fonsten) is closely related to the density of parasitical objects and the surrounding plant. By simulated test,a quantitative relationship between the occurrence and development of Anoplopora Chinensin(Fonsten) and the community of plants can be reached.Thus,a theoretically scientific basis wich by provided for the gardenins departments in the comprehensive control of Anoplopora Chinensin(Fonsten),in drawing up managerial plaus conformity to economical and ecological principles.