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

Effects of Three Kinds of Feeding Strategies on the Main Water Quality Factors and Growth of Tilapia mossambica in Aquaculture Ponds

[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、C 3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51 935.34%、59 128.57%和56 793.98%,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 B〈C〈A;Diversity level of phytoplancton population was in the order of B 〉A〉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 .