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作 者 ：杨国庆,吴进才,王洪全,姜永厚,邱慧敏

期 刊 ：生态学报 2003年 23卷 4期 页码：681~687

关键词：扬州大学农学院植保系；湖南师范大学生命科学院；

Keywords:Department of Plant Protection, Agricultural College, Yangzhou University, Yangzhou, China,

摘 要 ：采用脉冲抽样法调查 ,将两年的田间飞虱每日被捕食量与捕食性天敌密度的资料分为有水和无水两组 ,分析了两种条件下飞虱被捕食量、被捕食百分率与蜘蛛密度、飞虱平均拥挤度的关系 ,并在室内模拟有水和无水分别进行了拟水狼蛛 ( Pirata subpiraticus)和食虫瘤胸蛛 ( Oedothorax insecticeps)对褐飞虱 ( N ila-parvata lugens Sta。l)的捕食功能反应。结果表明 :飞虱被捕食百分率随飞虱平均拥挤度增加而呈递减趋势 ;在同一飞虱平均拥挤度时 ,有水时飞虱被捕食量大于无水 ;有水时飞虱被捕食量与水狼蛛密度呈二次抛物线型关系 ,水狼蛛密度在每穴 1 .4头时 ,飞虱被捕食量最大 ;无水时飞虱被捕食量与水狼蛛密度呈线型关系 ;两种条件下飞虱被捕食量与微蛛密度的关系不明显。室内功能反应同样证实了水狼蛛在有水时的捕食量大于无水 ,前者比后者高 1 .5倍 ,而食虫瘤胸蛛无明显差异。

Abstract:The daily predation of spiders to planthopper in paddy field was estim ated during 2000-01 using the method called pulse sampling (i.e. calculating th e number of planthopper preyed during time t to tΔt, based on the diffe rence be tween the planthopper number at time t and tΔt). Planthopper numbers w ere reco rded by killing with the insecticide (dichlorvos), and investigation was conduct ed successively for several days. In order to estimate daily predation, several supplementary experiments were also c...

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