| 中华绒螯蟹取食褐飞虱与3种杂草的初步研究 |
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| 引用本文： | 邵益栋 杨益众 余月书,邵洪 陆自强.中华绒螯蟹取食褐飞虱与3种杂草的初步研究[J].中国农学通报,2004,20(2):178-178. |
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| 作者姓名： | 邵益栋 杨益众 余月书 邵洪 陆自强 |
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| 作者单位： | 1. 扬州大学农学院植保系,扬州,225009
2. 江阴市华士镇农业服务中心,江阴,214400 |
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| 基金项目： | 江苏省海洋与渔业局资助 |
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| 摘 要： | 在室内研究了中华绒螯蟹对1种水稻害虫褐飞虱和3种稻田杂草紫背萍、稗草、水莎草的取食作用。结果表明，中华绒螯蟹对褐飞虱的控制作用相当明显，且随着褐飞虱密度的增加，河蟹对它的取食量明显增加；河蟹对3种稻田杂草的取食则存在明显的选择性，总的表现为对紫背萍和水莎草的取食能力强，对稗草的取食能力弱，且河蟹的取食能力随龄期的增长有下降的趋势。
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| 关 键 词： | 中华绒螯蟹 褐飞虱 紫背萍等杂草 取食作用 |
Studies on control of crab to a pest-insect and three kinds of weeds in rice-crab paddy-fields. |
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| SHAO Yidong,YANG Yizhong,YU Yueshu,SHAO Hong,LU Ziqiang.Studies on control of crab to a pest-insect and three kinds of weeds in rice-crab paddy-fields.[J].Chinese Agricultural Science Bulletin,2004,20(2):178-178. |
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| Authors: | SHAO Yidong YANG Yizhong YU Yueshu SHAO Hong LU Ziqiang |
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| Institution: | (1Department of Plant Protection，Yangzhou University， Yangzhou，225009，China； 2Center of Agricultural Service in Huashi Town，Jiangyin，214421，China) |
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| Abstract: | Feeding behavior of crab to a pest-insect (Nilaparvata lugens) and three kinds of weeds (Spirodela polyrrhiza， Echinochloa crusgalli， Juneceus serotinlls) in rice-crab paddy-fields were studied． The results showed that crab had different food-take to the weeds at its early stage， the order was S． polyrrhiza > J． serotinlls > E． crusgalli during the crab’s period of growth. But with the development of crab，it was getting smaller and smaller， even no food-take；In designed N． lugens population density (5～40 heads)， the functional response was belong to Holling-I． Three linear regression equations of experiment were as follows：Na=0.4167N-1.75， Na=0.4486N-2.0929 and Na=0.4505N-2.1857， the correlation coefficients all reached 0.99． |
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| Keywords: | Eriocheir sinensis Nilaparvata lugens Three kinds of weeds Food-take |
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