玛绢金龟成虫在烟田的空间格局分析

SPATIAL DISTRIBUTION OF THE COCKCHAFER Maladera sp.IN FLUE CURED TOBACCO

在烟株上对玛绢金龟（ Ｍａｌａｄｅｒａｓｐ．） 成虫的空间格局进行了测定。采用Ｔａｙｌｏｒ 幂法则、Ｉｗａｏ 聚集格局回归分析法和负二项概率模型来处理调查数据。结果显示： ３ 种方法的聚集指数（ｂ， β， ｋ） 都表明玛绢金龟在烟株上的空间格局为聚集分布， Ｔａｙｌｏｒ 幂法则拟合田间数据优于Ｉｗａｏ 聚集格局回归分析法。负二项概率模型系数ｋ 与样方平均数相独立， 表明公共ｋ （ｋｃ） 值的存在， 测定得知公共ｋｃ 值为０－６５２９。为进一步建立玛绢金龟序贯抽样方法提供了基础数据。

The spatial distribution of Maladera sp.adults on flue cured tobacco plants in Yunnan Provincewas determined.Taylor's power law,Iwao's patchness regression,and the negative binomial probability model were used to analyze the data.All three indices ( b,β and k ) of the three methods indicated an aggregated distribution of Maladera sp.Taylor's power law provided a better description than Iwao's patchness regression.The negative binomial distribution parameter k was not dependent on mean density.This indicates the presence of a common k ( k c).The estimate of k c was 0 6529.This study provided basic data for establishing a sequential sampling plan for Maladera sp.