An experiment was carried out to verify the effect of levels of phosphorus and the particle size of dicalcium phosphate on diets for brown egg layer hens during production phase. A complete randomized experimental design as a 2 × 3 factorial arrangement, with two sizes of particles of phosphate (fine and granulate) and three levels of available phosphorus (0.28, 0.38 and 0.48%), totalizing six treatements with five replications of eight birds each, was used. The experimental diets were isoproteic, isocaloric, […]

One experiment was conducted to evaluate the effect of different dietary fluorine:phosphorus (F:P) ratios on the performance and bone parameters of layer hens. One hundred and sixty layer hens were randomly allotted to an experimental design with four treatments (phosphorus sources with different F:P ratios – 1:40, 1:60, 1:80, 1:100) with five replicates of eight layers each. At the end of the experiment, two birds per replicate were slaughtered and their tibias were collected to assess the fluorine, calcium, phosphorus […]

Available phosphorus requirement of juvenile Nile tilapia (Oreochromis niloticus) was determined. A total of 352 fishes with initial weight of 0.41 g ± 0.30 g was assigned to a completely block experimental design were used, with four levels of available phosphorus and four replications. Diets with 32.0% CP and 3,050 kcal DE/kg were supplemented with dicalcium phosphate to obtain levels of 0.21; 0.40; 0.56 and 0.71% of available phosphorus in the diets. Diets were handly fed during 120 days. No […]