枣粮间作系统节肢动物群落聚类分析研究

In order to understand the character of arthropod community in different times and sectional dynamics of jujube-grain ecosystem, also to make the theory foundation of insect control and function manage of community, the investigation of arthropod community has been done in jujube-grain ecosystem which was divided into two sub-ecosystem: jujube yard and field, cluster analysis and optimization cut apart also have been used to study the date of investigation. The result show that the total arthropod community、natural enemies sub-communities、neutral arthropod sub-communities and phytophagous arthropod sub-communities in jujube yard can be cluster at the index D=178.0、42.38、175.7、77.0, meanwhile the arthropod community and sub-community can be cluster at the index D=255、120.2、183.3、176.5. The result of optimization cut apart show that the total arthropod community、natural enemies sub-communities、neutral arthropod sub-communities and phytophagous arthropod sub-communities in jujube yard can be divided into 4、3、3、4 piece, and in field the community can all be divided into 4 piece.