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中国农学通报

中国农学通报 ›› 2004, Vol. 20 ›› Issue (2): 178-178.

所属专题： 水产渔业

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中华绒螯蟹取食褐飞虱与3种杂草的初步研究

邵益栋 杨益众 余月书 邵洪 陆自强   

  • 出版日期:2004-04-05 发布日期:2004-04-05

Studies on control of crab to a pest-insect and three kinds of weeds in rice-crab paddy-fields.

SHAO Yidong， YANG Yizhong， YU Yueshu，SHAO Hong ，LU Ziqiang   

  • Online:2004-04-05 Published:2004-04-05

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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。

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．