大豆田豆黄蓟马空间分布型的研究

STUDY ON THE SPATIAL DISTRIBUTION PATTERN OF SOYBEAN THRIPS

根据对不同时期大豆田豆黄蓟马(Thrips nigropilosus Uzel)的虫口量的调查,分别计算了5种聚集度指标,并进行了Iwao回归分析,Taylor 幂的法则分析和频次拟合度分析。结果表明蓟马呈聚集分布(负二项分布),个体间存在相互吸引作用,分布基本成份是个体群,且种群聚集度对种群密度有依赖性。有虫株率和虫口密度存在相关关系,相关方程为ρ=0.7595+4.0197m(r=0.9394**)。

Based on the survey of Thrips nigropilosus Uzel numbers on different stages, several methods were used, which included Iwao regression analysis, Taylor power principle analysis and frequency imitate degree analysis. The result suggested that:Thrips show gathering distribution (negative binomial distribution), one appeals to the other, the basic distribution element was group, and the specific group aggregation depended on the specific group density. Relationship existed between pest density and the decayed plants, the equation was:ρ=0.7595+4.0197m(r=0.9394**).