有机肥对稻飞虱种群及其天敌的影响  

Effect of organic fertilizer treatment on rice planthopper population and its natural enemy community

作　　者：钟平生[1] 梁广文[1] 曾玲[1] 

机构地区：[1]华南农业大学昆虫生态研究室

出　　处：《华东昆虫学报》2005年第2期136-140,共5页Entomological Journal of East China

基　　金：国家"973"重大科研项目(G20000162209);国家农业结构调整重大技术研究专项(2002-01-05A);惠州学院博士启动基金(C503.0203)资助项目。

摘　　要：有机肥区早稻白背飞虱(Sogatella furciferaHarvath)1-2龄若虫、3-5龄若虫及成虫发生量均明显低于单施化肥区,单施化肥区发生量为有机肥区的4.48-5.63倍;晚稻单施化肥区褐稻虱(Nilaparvata lugensStal°)1-2龄若虫、3-5龄若虫及成虫发生量为有机肥区的2.23-3.92倍;施用有机肥,蜘蛛、捕食性天敌昆虫与寄生性天敌昆虫的物种数(S)、Shonnon-W iener多样性指数(H′)与均匀度指数(E)均有不同程度的提高,与单施化肥区相比,未达到显著差异。以上表明,施用有机肥能显著降低稻飞虱种群的为害,有利于自然天敌的保护利用,恢复稻田生态环境。The organic fertilizer treatment could significantly decrease rice planthopper population. Compared with pure synthetic fertilizer, the organic fertilizer treatment could reduce rice planthopper by 4.48 -5.63 times in early rice fields and 2.23 -3.92 times in late rice fields. The species number index （S） of spiders predatory and parasitoid insects, Shonnon-Wiener diversity index （H＇） or evenness index （E） was higher in organic fertilizer treated fields, but the differences were not significant. These indicate that organic fertilizer helps to decrease the planthopper population, protect the natural enemies and restore paddy field ecological environment.

关 键 词：有机肥 白背飞虱 褐稻虱 天敌 

分 类 号：S435.112.3[农业科学—农业昆虫与害虫防治]