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卫矛矢尖蚧一龄若虫种群扩散规律的模糊聚类分析

标题: 卫矛矢尖蚧一龄若虫种群扩散规律的模糊聚类分析
英文标题: STUDIES ON THE SPREADING RULE OF FIRST INSTAR NYMPH POPULATION OF UNASPIS EUONYMI WITH FUZZY CLUSTER METHOD
作者: 高宝嘉,申曙光,张玉会,王正文
英文作者: GAO BAOJIA,SHEN SHUGUANG,ZHANG YUHUI
出版时间: 1994-01-01
机构: 河北农业大学
关键词: 扩散规律,种群动态,模糊聚类,卫矛矢尖蚧
英文关键词: SPREADING RULE,POPULATION DYNAMIC,FUZZY CLUSTER METHOD,UNASPIS EUONYMI(COMSTOCK)
刊名: 河北林学院学报
ISSN: 1007-4961
卷号: 002
页码: 135-140
分类号: Q968.1
摘要: 应用模糊聚类分析方法,以平均密度、聚集度指标M*/M和有虫样方比率作为聚类因子,分析了卫矛矢尖蚧一龄若虫种群的扩散规律.结果表明,卫矛矢尖蚧一龄若虫种群的扩散期是其孵化高峰前后;孵化高峰期为种群向更大的生境空间急剧扩张时期;孵化初期及末期为种群的聚集、收缩时期
英文摘要: The first instar nymph stage of Unaspis euonymi is the vunerable poriod in its life circle. In this paper,the spreading rule of the first instar nymph population of Unaspis euonymi is analysed with Fuzzy Clustcr Method.The cluster factors adopted are average den- sity,aggregation index(m*/m)and the rate of sample plots with the insect.The results shows that the spreading stage of the first instar nymph population of U. euonymi is around the hatching peak stage of it,and it is the rapid expansion stage of...