论文部分内容阅读
利用田间系统调查资料和文献报道资料,组建了水稻褐飞虱种群动态模拟模型,该模型采用生理时间、主要成分包括迁入种群的迁入时间、数量和格局;密度、生育阶段、温度、天敌和人为措施对死亡率和生殖力的影响;密度、生育阶段和短翅型比及迁出率的关系.有效性检验表明,该模型模拟的种群时间和数量动态与实际观察动态相似,在对比检验的10组历史资料中,模拟预测的全部主害代高峰期和9组主害代高峰虫量与实测值相符.实测种群动态与模拟种群动态间的差异表明,深入研究秋季低温对生殖力和死亡率的持续影响,研究田间天敌作用的正确评价及水稻生长模型,将有助于理解和预测褐飞虱的种群动态.
Based on the data collected from field surveys and literature reports, a dynamic simulation model of brown planthopper (BPH) population dynamics was established. The model adopted physiological time, and the main components included immigration time, quantity and pattern of immigrated populations; density, fertility stage, temperature, The relationship between mortality and fertility, the density, the stage of fertility and the ratio of short-winged to the rate of evacuation.The validity test shows that the dynamics of time and number of the population simulated by the model are similar to those of the actual observation, In the 10 groups of historical data, the peak numbers of all the major damaging generations and the peak pest populations in the 9 groups were in good agreement with the measured values.The differences between the observed population dynamics and the simulated population dynamics indicate that the effects of autumn low temperature on fecundity and mortality The continuous assessment of the effects of BPH on planthopper, the correct evaluation of the role of natural enemies in the field, and the rice growth model will help to understand and predict the population dynamics of BPH.