【摘要】 通过田间调查 ,对春伐桑园中的桑蓝叶虫的空间分布型、分布图式进行了分析。结果证明 :桑蓝叶虫的空间分布型 80 %符合负二项分布 ,70 %符合Neyman分布 ,不符合Poisson分布 ;空间分布图式为聚集型。序贯抽样方程为 :T1(q) =3q + 4.5 5 41q ,T2 (q) =3q - 4 5 5 41q。更多还原

【Abstract】 Analysis on the spatial distribution pattern and distribution diagram of Phyllobrotica armata Baly in spring pruning mulberry field were carried out through field investigation.The results revealed that 80% of the spatial distribution pattern of the Phyllobrotica armata Baly conformed to negative binomial distribution,70% conformed to Neyman distribution and not to Poisson distribution.Spatial distribution diagram is aggregate.The forum for sequential sampling is: T1(q)=3q+4.5541q,T2(q)=3q-4 5541q更多还原