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本文采用K值法、扩散指标法、平均拥挤度m~*法,Tay lor幂指数法,Iwao的平均拥挤度m~*对平均数m的回归分析法,测定了赤松毛虫2龄幼虫、4龄幼虫、茧、卵块的空间分布型,并对其抽样技术进行了探讨。赤松毛虫2龄幼虫、4龄幼虫、茧在油松天然林中均呈聚集分布,聚集强度随种群密度的升高而增加;卵块的分布,在0.70块/株以下时为聚集分布,在0.7块/株时为随机分布,在0.70块/株以上时为均匀分布。在测定了空间分布型的基础上,计算了2龄幼虫,4龄幼虫,茧,卵块在各密度下的最
In this paper, K value method, diffusion index method, average crowding degree m * method, Tay lor power index method, Iwao average crowding degree m ~ * average number of m regression analysis of the second instar Caterpillars, 4 Larvae, cocoon, egg block spatial distribution, and its sampling techniques were discussed. The second-instar larvae, fourth-instar larvae and cocoon of Caterpillar decreased in the natural forest of Pinus tabulaeformis, and the aggregation intensity increased with the increase of population density. The distribution of the eggs was aggregated distributed below 0.70 piece / Block / strain was random distribution, in the 0.70 block / above the uniform distribution. Based on the determination of the spatial distribution pattern, the effects of density on the 2nd instar larvae, 4th instar larvae, cocoon and egg mass were calculated