【摘要】 应用不同的聚集指标对玉米蚜种群的空间动态进行分析。结果表明 ,玉米蚜在玉米田始终成聚集分布 ;选择受密度影响较小的聚块性指标 M/X 的值 ,描述了玉米蚜种群空间格局的时序动态 ,表明玉米蚜聚集强度有明显的规律 ,呈现高—低—高的趋势。综合玉米蚜种群数量的消长规律、环境因子的变化等信息 ,对其空间图式及其时序动态特征的成因进行了分析更多还原

【Abstract】 Different aggregation indices were used to analyse the spatial patterns of R.maidis .The results indicated that the population of R.maidis was aggregated on the maize.The / value of patchiness indices less affected by density was chosen to describe the temporal patterns of the aphid population.The aggregation intensity changed regularly,the population changed from highly to loosely aggregated,and then to highly aggregated again.With reference to trade off population and the change of enviromental factors,the mechanism of the observed spatial patterns was discussed.更多还原