栗角斑蚜与红点唇瓢虫种群空间格局的地统计学分析

Geostatistical Analysis on Spatial Patterns of the Myzoxallis karicola Matsumura and Chilocorus kuwanae Silvestri

应用地统计学方法对栗角斑蚜及其天敌种群的空间结构和空间相关性进行研究。结果表明,在板栗生长的4～7月和9月等5个时期,栗角斑蚜种群的半变异函数模型是球形,在林间基本上呈聚集型分布。只是在个别时期(8月和10月),栗角斑蚜种群的半变异函数为直线型,在林间的空间格局为随机分布或均匀分布。红点唇瓢虫种群的半变异函数模型均为球形,在林间呈聚集型分布。栗角斑蚜种群和红点唇瓢虫种群的实验半变异函数曲线模糊贴近度在不同时期均较高,同域效应明显。

Investigations on the spatial construction and distribution of M.karicola Matsumura and its natural enemies, C.kuwanae Silvestri, at different periods were conducted with geostatistics.The results indicated that the semivariogram of M. karicola Matsumura was described by spherical model from 18 April to 20 July and 23 September, showing an aggregated spatial arrangement. But in some special periods, for example, on 22 August and 25 October, the semivariogram of M.karicola Matsumura was depicted as linear models, showing random or even arrangement. As for C.kuwanae Silvestri, the models were all spherical ones from 18 April to 25 October, showing an aggregated spatial arrangement. The fuzzy neartude of observed semivariogram were high in different times, and the synchronous effects were obvious between M.karicola Matsumura with C.kuwanae Silvestri.