不同投饲策略对池塘养殖罗非鱼生长及主要水质因子的影响

摘要

[目的]研究不同投饲策略对“海南一号”罗非鱼生长及养殖水体的影响。[方法]设置A、B、C3种投饲策略，研究其对池塘养殖期对池塘养殖“海南一号”罗非鱼生长及养殖水质的影响。[结果]在整个养殖期间，投饲策略A、B、C养殖罗非鱼的相对增重率分别为的51935．34％、59128．57％和56793．98％， B 投饲策略养殖池塘罗非鱼平均体重最大，达787．74 g／尾，比策略 A 和 C 塘分别提高13．82％和4．10％；B投饲策略养殖池塘罗非鱼的饲料能耗最低，比策略A和C分别降低19．39％和1．66％；各投饲策略池塘养殖水体富营养化程度从低到高依次为：策略B、策略C、策略A；各投饲策略池塘浮游植物种群多样性水平从高到低依次为策略B、策略A、策略C。[结论]投饲策略B（平均日投饲率1．89％，日投饲2次，每隔5 d停止投饲1 d）有利于实现池塘养殖罗非鱼较快生长并保持较好的养殖水环境。%Objective] To research the effects of different feeding strategies on the Tilapia mossambica growth and aquaculture water.[Method] Three kinds (A,B,C) of feeding strategies were set.Effects of different feeding strategies on the water quality and growth of T.mossambica were researched.[Result] During the whole growth period,relative weight gains of aquaculture T.mossambica in feeding strategies (A,B,C) were 51 935.34%,59 128.57% and 56 793.98%,respectively.The average body weight of T.mossambica in strategy B was the maximum (787.74 g/tail),which enhanced by 13.82%and 4.10%compared with strategies A and C,respectively.Energy consumption of feed was the minimum in strategy B,which reduced by 19.39%and 1.66%compared with strategies A and C,respectively.Eutrophication degree of aquaculture water was in the order of BA>C.[Conclusion] Feeding strategy B (1.89%daily average feeding rate,feeding twice every day,stop feeding for 1 d after every 5 d) helps to realize the relatively rapid growth of tilapia and maintain relatively good water aquaculture environment .