主养草鱼池塘三种混养模式鱼类生长和效益的比较

为进一步提高我国广大池塘养鱼的产品质量、经济效益和改善其生态环境。本试验在武汉新洲973项目实验基地9个陆基鱼池中进行了三种不同混养模式鱼类生长和效益的比较研究，每种模式设3个重复。模式Ⅰ中放养草鱼、鲢、鳙和高背鲫；模式Ⅱ中放养草鱼、鲢、鳙、匙吻鲟和高背鲫；模式Ⅲ中放养草鱼、鲢和高背鲫。结果表明：通过122d的养殖试验，模式Ⅱ中草鱼的生长不仅显著高于模式Ⅰ和模式Ⅲ（P<0.05），而且其经济效益模式Ⅱ同样高于模式Ⅰ和模式Ⅲ。

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

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(P<0.05),but also its economic benefits higher than that in the model I and model III.