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运用二次通用旋转组合设计统计方法 ,选择稻田生态系统中天敌蜘蛛优势种拟水狼蛛 (Piratasubpirati cus)、粽管巢蛛 (Clubionajaponicola)、锥腹肖蛸蛛 (Tetragnathajaponica) 及水稻主要害虫褐飞虱 (Nilaparvatalu gens) 和稻赤斑沫蝉 (Callitettixversicolor) 组成多物种共存系统 ,探讨蜘蛛对稻虫的控制作用 ,分析天敌之间、害虫之间以及天敌与害虫之间的相互作用关系 ,获得了 6个天敌对害虫的捕食量模型。对模型进行主效分析表明 ,害虫密度的大小对天敌的总捕食量影响较大 ,其中又以褐飞虱对捕食量的影响最大。天敌中对捕食量作用最大的是拟水狼蛛 ,其次是锥腹肖蛸和粽管巢蛛。分析天敌间的交互作用表明 ,天敌个体大、活动能力强、生态位窄及其重叠值高、捕食量大 ,它们的种内种间干扰程度也大 ,特别是粽管巢蛛和锥腹肖蛸蛛各自的种内干扰、拟水狼蛛与粽管巢蛛的种间干扰作用十分明显。最后讨论了天敌蜘蛛能有效控制害虫的最大密度 ,以及在该害虫密度下各种天敌密度的最佳组合
By using the statistical method of quadratic universal rotation combination design, Piratasubpirati cus, Clubionajaponicola, Tetragnathajaponica and the main pests of rice brown planthopper, Nilaparvata lugens Nilaparvatalu gens and Callitettixversicolor, and discussed the control effect of spiders on rice pests. The relationships among natural enemies, pests and natural enemies and pests were analyzed, and 6 Predation model of predators on pests. The main effect analysis of the model shows that the pest density has a great influence on the total predation of natural enemies, and the brown planthopper has the greatest impact on the predation amount. The most predatory predatory species in the natural enemies is the Pirata subpiraticus, followed by the Conus belly Xiao and Zhai tube nest spider. Analysis of the interaction between the natural enemies showed that natural enemies of individual large, strong activity, niche narrow and its high overlap, predation, and their interspecies interference is also large, Achnatherum spider their respective species of interference, the proposed water tarantula and dump pipe nest spider interspecific interference is very obvious. Finally, it is discussed that the natural enemy spiders can effectively control the maximum density of pests and the optimal combination of various natural enemy densities at the pest density