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为明确新疆棉田牧草盲蝽Lygus pratensis(Linnaeus)的空间分布型,于2012-2014年对新疆喀什地区棉田牧草盲蝽种群数量进行了系统调查,应用5种聚集度指数、Iwao m*-m回归方程和Taylor幂法则分析判定牧草盲蝽成虫、若虫及整个种群(成虫和若虫)在棉田的空间分布型,并利用种群聚集均数分析聚集原因。结果表明,牧草盲蝽成虫、若虫及整个种群的久野指数C_A>0、负二项分布参数k>0、丛生指数I>0、聚块指数m*/~->1,表明三者在新疆棉田均呈聚集分布。且牧草盲蝽成虫和若虫的Blackith聚集均数λ<2,说明二者在棉田的聚集是由环境因素引起的。Iwao m*-m回归分析结果表明,牧草盲蝽成虫、若虫和整个种群个体间相互吸引,分布的基本成分为个体群(α>0、β>1);Taylor幂法则分析结果表明,牧草盲蝽成虫、若虫和整个种群在棉田更趋向于聚集分布,聚集度依赖于密度。
In order to clarify the spatial distribution of Lygus pratensis (Linnaeus) in Xinjiang cotton field, the population of L. occidentalis population in Kashgar region of Xinjiang was systematically investigated in 2012-2014. Five kinds of clustering index, Iwao m * -m regression The spatial distribution patterns of adults, nymphs and the whole population (adult and nymphs) of the herds in the cotton field were analyzed by the equations and Taylor's power law. The reasons for the aggregation were analyzed by the means of population aggregation. The results showed that for the adults, nymphs, and the whole population, the long-field index C_A> 0, the negative binomial distribution parameter k> 0, the clumping index I> 0 and the clustering index m * / ~ -> Xinjiang cotton fields were gathered and distributed. And the Blackith aggregation mean λ <2 of adults and nymphs of L. faecalis indicated that the aggregation of the two in the cotton field was caused by environmental factors. The results of Iwao m * -m regression analysis showed that the main components of adults, nymphs and individuals of the whole population were individuals (α> 0, β> 1). The Taylor power law analysis showed that the blind Bugs adults, nymphs and the entire population tended to aggregate in the cotton fields, and the degree of aggregation depended on the density.