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以大田调查资料,运用频次布分、Iw ao 和 Taylor 及聚集指标等测定法,分析了长腿蜘蛛在麦田的空间分布为负二项分布,结构的基本成份为相互吸引的个体群,个体群的大小(L)与虫口密度(m)呈显著的直线相关(L=1.8997+2.3976m,r=0.8297~(##)),聚集的原因主要取决于环境因素,其拥挤度(M~#)与平均密度的关系为:M~#=0.8997+2.3978m,(r=0.8209~(##)),种群密度(λ)与有虫样点率(P)的关系:λ=1.8299[-1n(1-P)]~(1.1605),(R~2=0.9105~(##)),并且计算了在目标精确度为25%和10%时,不同虫口密度下的理论抽样数,以及以无虫植株(即零样方)发生频率为基础的序贯抽样.
Based on the field survey data, the distribution of long-legged spiders in wheat field was negative binomial distribution using the frequency distribution, Iwave and Taylor, and aggregation indexes. The basic components of the structure were the individual groups and the individual groups (L = 1.8997 + 2.3976m, r = 0.8297 ~ (##))). The reason for the aggregation mainly depends on the environmental factors, and the crowding degree (M ~ ) And the average density were: M ~ # = 0.8997 + 2.3978m, (r = 0.8209 ~ (##)), and the relationship between population density (1-P)] ~ (1.1605), (R ~ 2 = 0.9105 ~ (##)), and the theoretical number of samples at different insect population densities were calculated at target accuracies of 25% and 10% Sequential sampling based on the frequency of non-insect plants (ie, zero quadrats).