【摘要】 应用多个聚集度指标和Iwao,Taylor与兰星平等的回归分析方法,对刺柏大痣小蜂幼虫的空间分布型进行研究,结果表明其空间分布型为聚集型分布。用B lackith提出的"聚集均数"法对聚集原因进行分析,刺柏大痣小蜂幼虫聚集的原因是由害虫本身的生物学特性和环境因子共同作用所造成。在回归分析检验中以La-m模型的拟合效果最优。更多还原

【Abstract】 The spatial distribution pattern of Megstigmus formosana was studied by applying some aggregation indices,Iwao,Taylor and Lan Xinping regression analysis methods.The results showed that the spatial distribution pattern of the M.formosana belonged to the aggregation distribution.It was indicated by ’the Mean of Aggregation Value method proposed by Blackith that the aggregation distribution was caused by both the biological characteristics of the insect species and the environmental factors.The optimum regression result was obtained by the La-m regression model.更多还原