作　　者： ; ; ; ;

机构地区： 华南农业大学资源环境学院农业部生态农业重点开放实验室

出　　处： 《农业工程学报》 2010年第11期283-289,共7页

摘　　要： 为研究系统动力学方法在害虫种群的优化管理和预测等研究中的应用,以稻纵卷叶螟第二代种群为研究对象,分析了稻鸭共作系统中捕食性天敌蜘蛛及鸭对稻纵卷叶螟生长发育的影响,构建了相应的系统动力学框架模型,并利用STELLA软件对稻纵卷叶螟种群的数量动态进行了模拟和预测。结果表明,当第二代稻纵卷叶螟初始的百穴卵量为100粒,稻田蜘蛛密度为每百穴12.623头,如果同时考虑鸭对3龄幼虫期稻纵卷叶螟卷苞60%的捕食率,稻纵卷叶螟成虫的密度可降至每百穴9.129头,鸭的捕食可使稻纵卷叶螟第三代卵期末的百穴卵量减少约6.7%。稻田蜘蛛和鸭的共同作用对稻纵卷叶螟的控制效果优于仅受同等数量蜘蛛控制时的情况。研究结果可迅速、便捷地为害虫的优化管理等提供丰富的信息和参考。 To examine the application prospect of system dynamics approach in pest population optimal management and prediction,population dynamics of the 2nd generation of Cnaphalocrocis medinalis Guenee was investigated in this paper. Influences of the dominant predators including spiders and ducks in rice paddy field on Cnaphalocrocis medinalis Guenee were analyzed and a frame model was established. Using the system dynamics method,population dynamics of the Cnaphalocrocis medinali Guenee was simulated and forecasted under different scenarios. Results indicated that with a number of 100 initial eggs and a defined spider density in 12.623 ind/100 hill,the estimated adult Cnaphalocrocis medinalis Guenee population with ducks predation at a constant rate of 60% was 9.129 ind/100 hill. The activities of the ducks reduced the field ovum of 3rd generation by 6.7%. The main conclusion from the model results was that a more effective suppression of Cnaphalocrocis medinalis Guenee population could be implemented with optimum combining the function of the spiders and ducks in pest control. The results are expectative to provide worthy informations and scientific guides with rapid and convenient ways

关 键 词： 害虫控制 种群动态 生物防治 稻纵卷叶螟 种群控制 模型 蜘蛛 鸭

领　　域： [农业科学]