水稻一稻纵卷叶螟-天敌系统的优化管理

本研究是在水稻群体生长模型和纵卷叶螟种群生命系统模拟模型的基础上进行的。通过耦台水稻与纵卷叶螟相互关系模型,模拟了水稻-纵卷叶螟-天敌系统动态,估算了在不同条件下纵卷叶螟的产量损失率,结合经济核算确定不同条件组合下的经济阈值(多维动态经济阈值)。我们从稻田生态系统的整体出发,给出了稻纵卷叶螟管理系统流程图,图中将决策区分为趋势决策和实时决策,寓测报和防治于一体,以优化管理为目的。

OPTIMAL MANAGEMENT OF THE RICE-RICE CASE WORM (CNAPHALOCROCIS MEDINALIS GUENEE)-NATURAL-ENEMY SYSTEM

The study has been based on both the model for rice population growth and the model for simulating population life system of lice case worm. By coupling a correlative model of the lice and the insect pest, the dynamics of the rice lice case worm natural enemy system was simulated day by day,the rates of yield loss being assessed under different conditions. Further by economic accounting, the poly dimentional and dynamic economic threshold was determined. In light of the holistic ecosystem in rice field, a flow chart of management system of the rice case worm was suggested. In the flow chart, the decision making process was distinguished into tendency and real time decision making, merging pest pediction and control in harmony,and attempting to conduct the optimal management of insect pests.