主养草鱼池塘3种混养模式鱼类生长和效益比较

Comparative on Fish Growth and Efficiency of Three Polyculture Models in Grass Carp Mainly Culture Pond

为进一步提高池塘养鱼的产品质量和经济效益,改善养殖生态环境,在武汉新洲973项目实验基地的9个陆基鱼池中,对主养草鱼的3种不同混养模式鱼类生长和效益进行了比较研究。模式Ⅰ放养草鱼、鲢、鳙和高背鲫,模式Ⅱ放养草鱼、鲢、鳙、匙吻鲟和高背鲫,模式Ⅲ放养草鱼、鲢、匙吻鲟和高背鲫。通过122 d的养殖试验,模式Ⅱ草鱼的生长不仅显著高于模式Ⅰ和模式Ⅲ(P<0.05);经济效益对比分析发现,模式Ⅱ同样高于模式Ⅰ和模式Ⅲ。

To further enhance the fish product quality,economic benefits and improve the ecological environment of Chinese vast number of ponds,fish growth and stocking efficiency of three different polyculture models were tested in nine land-based fish ponds in the 973 projects experimental base in Xinzhou district,Wuhan.In the model I,the stocking fish were included grass carp（Ctenopharyngodon idellus）,silver carp（Hypophthalmichthys molitrix）,bighead carp（Aristichthys nobilis） and high-back crucian carp（Carassius auratus）.The grass carp,silver carp,bighead carp,high back crucian carp and paddlefish（Polyodon spathula） were stocked in the model II,while grass carp,silver carp,Paddlefish and high back crucian carp in the model III.Each mode was set up in three replications.Through 122 days culture trail,the results showed that the model II not only had the significantly higher growth rate of grass carp than that in the model I and model III（P0.05）,but also its economic benefits higher than that in the model I and model III.