| 卫矛矢尖蚧一龄若虫种群扩散规律的模糊聚类分析 |
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| 引用本文： | 高宝嘉,申曙光,张玉会,王正文.卫矛矢尖蚧一龄若虫种群扩散规律的模糊聚类分析[J].河北林果研究,1994(2). |
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| 作者姓名： | 高宝嘉 申曙光 张玉会 王正文 |
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| 作者单位： | 河北林学院林学系，邯郸市园林处 |
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| 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
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| 关 键 词： | 扩散规律，种群动态，模糊聚类，卫矛矢尖蚧 |
STUDIES ON THE SPREADING RULE OF FIRST INSTAR NYMPH POPULATION OF UNASPIS EUONYMI WITH FUZZY CLUSTER METHOD |
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| Gao Baojia ,Shen Shuguang, Zhang Yuhui.STUDIES ON THE SPREADING RULE OF FIRST INSTAR NYMPH POPULATION OF UNASPIS EUONYMI WITH FUZZY CLUSTER METHOD[J].Hebei Journal of Forestry and Orchard Research,1994(2). |
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| Authors: | Gao Baojia Shen Shuguang Zhang Yuhui |
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| Abstract: | 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 the population to the much larger habitat space. And its initial and last hatching stages are the aggregation and contrac-tion stage of the population. |
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| Keywords: | spreading rule population dynamic Fuzzy cluster method Unaspis euonymi(comstock) |
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