Response of Rainbow Trout (Oncorhynchus mykiss) Growing from 50 to 200 g to Supplements of Dibasic Sodium Phosphate in a Semipurified Diet

摘要: Effects of increasing dietary concentrations phosphorus on growth, feed intake, conversion, composition gain and concentration inorganic phosphate in plasma were studied rainbow trout. Twelve groups 20 trout initially weighing 53 ± 0.6 g/fish fed semipurified diets containing 19.6 MJ digestible energy per kilogram dry matter. levels ranging from 1.03 to 10.96 g/kg matter achieved by replacing binder with dibasic sodium 11 graded levels. Nonlinear responses determined over d described using exponential functions. Feed growth rate conversion ratio as well increased concentration. The phosphorus, calcium, magnesium potassium weight increased, whereas lipids decreased Concentrations protein unaffected. Different required for achieving 95% the plateau value desired traits. In deposition, 3.7 5.6 matter, respectively. However, was utilized most efficiently (88%) at a 2.5 At that resulted maximum deposition (5.6 matter), utilization about 60%. Supplemental completely available which must be considered formulating recommendations. Based this work, 0.25 g phosphorus/MJ is recommended diets.