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综合多个聚集度指标对绿僵菌药后田间蝗虫和僵虫的空间分布型进行了研究。结果表明:施药后不同时间随蝗虫种群密度的减小,处理区残虫的分布型呈现聚集-随机交错变动,僵虫的空间分布型为聚集分布。采用Taylor幂法则和改进的Iwao模型分析表明,整个调查时段处理区残虫、僵虫的空间分布均为聚集分布。推测认为,药后蝗虫点片状死亡,部分地片相对密度较高,残虫分布型趋向聚集;自然消除作用使僵虫密度很低,低密度下取样产生大量空样本,僵虫的分布型产生聚集假象。
The spatial distribution patterns of locusts and wood bees in the field of Metarhizium anisopliae were studied by comprehensively combining multiple clustering indexes. The results showed that the dispersal of the distribution patterns of the beetles in the treated area varied randomly with the decrease of locust population density at different times after application, and the distribution pattern of the spatial distribution of the woodpeckers was aggregated. The Taylor power law and the improved Iwao model show that the spatial distributions of the beetles and the beetles in the treatment area are aggregated throughout the survey period. Speculated that after drug locust spotted death, part of the relative density of higher density, tend to tend to gather the distribution patterns; natural elimination of the density of the very low density of the dead, sampling at low density to produce a large number of empty samples, Gathering artifacts.