三倍体虹鳟微流水养殖研究与比较效益分析

Research and Comparative Benefit Analysis of Triploid Rainbow Trout in Micro Water Culture

为了在"微流水+液态氧增氧"条件下,对增氧系统设备参数、系统增氧效率、三倍体虹鳟养殖生产性能及其比较效益等进行研究,提出针对该养殖模式的相关技术经济参数,通过为期573 d的中试生产试验。结果表明,在平均注水率仅为7.49的条件下,三倍体虹鳟由平均初始规格9.46 g的质量增至平均2 004.41 g;单位水体载鱼密度由2.737 kg/m^3增加至17.82 kg/m^3;平均日增质量3.48 g,平均饲料系数1.16,养殖成活率为92.46%。液态氧增氧系统平均增氧效率为1.66 kg/(k W·h),可完全满足三倍体虹鳟良好生长的需要。试验表明,该新型养殖模式比较效益显著,投入产出比为1∶1.73,单周期毛利润率净提升约22%~25%,具有良好的推广应用前景。

Under the condition of"micro water+liquid oxygen oxygenation",to study the efficiency of system equipment parameters,increase oxygen,triploid rainbow trout farming production performance and comparative effectiveness research,put forward against the cultivation mode of related technical and economic parameters,the paper had passed a pilot production test of 573 d.The results showed that under the condition of the average water injection rate was only 7.49,quality of triploid steelhead increased from an average initial quality of 9.46 g to an average of 2 004.41 g,the density of fish in unit water increased from 2.737 kg/m3 to 17.82 kg/m3,average daily mass was 3.48 g,the average feed coefficient was 1.16,and the survival rate was 92.46%.The average oxygenation efficiency of the liquid oxygen system was 1.66 kg/(kW·h),which could fully meet the needs of the triploid rainbow trout to grow well.The experiment shows that the new model has obvious benefit,the input-output ratio is 1∶1.73.The net increase of single cycle gross profit margin is about 22%-25%,which has good promotion and application prospects.