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为探索不同稻田生态系统调控功能差异的机理,连续2年通过黄板诱集取样法,研究了有机稻田和化防稻田中白背飞虱Sogatella furcifera、褐飞虱Nilaparvata lugens与其主要天敌类群的时间生态位宽度及生态位重叠变化规律。研究结果表明,2010年黄板诱集法取样下有机稻田中稻飞虱与主要天敌类群的生态位重叠值平均值(0.5492)大于化防稻田(0.3777),有机稻田中主要天敌类群的生态位宽度平均值(0.4967)大于化防稻田(0.4118);2011年黄板诱集法取样下有机稻田中稻飞虱与主要天敌类群的生态位重叠平均值(0.5919)大于化防稻田(0.4252),有机稻田中主要天敌类群的生态位宽度平均值(0.5022)大于化防稻田(0.4090)。这表明有机稻田生态系统相比较于化防稻田生态系统而言,在时间生态位层面是通过影响稻飞虱和天敌类群的时间生态位宽度指数及其天敌与稻飞虱的生态位重叠值,来增强稻田节肢动物群落系统的自我调控能力。
In order to explore the mechanisms of different regulatory functions in different paddy fields, the temporal niches of Sogatella furcifera, Nilaparvata lugens and their major natural enemy populations in organic rice field and chemical controlled paddy field Width and niche overlapping variation. The results showed that the mean value of niche overlap (0.5492) of midgut planthopper and its major natural enemy populations in yellow paddy soils collected in 2010 was greater than that in Huaibei paddy soils (0.3777). The niche of major natural enemy in organic rice (0.4967) was greater than that of the control paddy field (0. 4118). The mean value of niche overlap (0.5919) of the middle-sized planthoppers and main natural enemy populations in the yellow paddy field sampling in 2011 was greater than that of the chemical defense paddy field (0.4252) The average niche breadth of major natural enemy populations in organic paddy field (0.5022) was greater than that of the control paddy field (0.4090). This indicates that the ecological niche of organic rice ecosystem is at the niche level of niche by comparing the temporal niche breadth index and the niche overlap of natural enemies and planthoppers with the impact of planthoppers and natural enemies, To enhance self-regulation of the arthropod community system in paddy fields.