配方施肥对白背飞虱种群动态影响的研究

为了探索武陵山区氮、磷、钾化肥配方施用对白背飞虱种群动态的影响,更好地预测和防治白背飞虱,搞好测土配方施肥技术的推广,2008～2010年在重庆市秀山县水稻示范片的配方施肥区和“3414”小区肥效试验田进行了研究.结果表明:相对于习惯施肥,配方施肥对白背飞虱种群数量具有较好控制效果；氮素化肥对白背飞虱种群数量有很大促进作用,磷、钾化肥在一定用量内对白背飞虱有促进作用,但达一定用量后,则对白背飞虱种群数量有一定抑制作用；3大肥料元素中,氮对白背飞虱种群的影响具有决定性作用.因此,通过肥料的合理配施,则能发挥配方施肥对白背飞虱种群数量的控制作用.

Studies on Influence of Formulated Fertilizer on Population Dynamics of Whitebacked Planthoppe

In order to explore the effect of formulated fertilization with nitrogen,phosphorus and potassium on the population dynamics of the whitebacked planthopper(Sogatella furcifera) in the area of Wuling.In 2008-2010,the experiment was conducted in the demonstrative fertilization of rice and the experimental field of fertilizer efficiency in XiuShan of ChongQing.The results show that,compared with the routine application of fertilizer,the formulated fertilization on the population dynamic of S.furcifera had a better control effect.The application of nitrogen fertilizer could significantly promote the population dynamic of S.furcifera,however,the excessive phosphorus or potassium fertilizer showed a marked inhibition effect.These results indicated that the nitrogen fertilizer plays a decisive role in the population dynamics of the S.furcifera,and the application of phosphorus or potassium fertilizer at a proper ratio would be a good guidance in production.