The aim in this work was to evaluate two mathematical models on the study of the flow of the phosphorus in metabolism of swines aiming at highlighting the most efficient model and indicating the highest potential phosphosrus source to be used in nutrition for swines. It was used 21 hybrid barrow at 32 kg initial weight fed diets based on corn, soybean meal and vegetal oil, supplemented with dicalcium phosphate, monodicalcium phosphate, triple superphosphate, simple superphosphate, Catalão rock phosphate or […]

The source of phosphorus of better quality for use in the pig feeding and that cause less environment impact by the excretion of phosphorus in the enviroment was evaluated. Twenty-one male pigs weighting 34.94 ± 2.88 were fed corn-soybean meal based diets supplemented with different P sources: control without P supplementation P (Cont), dicalcium (FBC), monodicalcium (MBC), triple superphosphate (ST), simple superphosphate (SS), Catalão rock (Rocha) and phosphoric acid (AcF). The experiment was designed to evaluate the P availability and […]

The study was conducted to evaluate the biological flow of P in pigs fed diets based on corn, soybean meal, defatted rice bran (DRB) and soybean oil, with increasing phytase levels (253, 759, 1265 and 1748 PU/kg of diet), using mathematics models. The model was deterministic and compartimental, in which the gastrintestinal tract (GIT) (C1), the plasma C2, the bones (C3) and the soft tissues (liver, heart, kidney and muscle) (C4) represented the compartments. Metabolism data and kinetics of P […]

Twenty-eight male pigs averaging 28.95 kg were used to determine endogenous fecal losses, true absorption and phosphorus bioavailability in different phosphorus sources. The experiment was arranged in randomized blocks, with seven treatments and four repplicates and one pig/box. The diets were corn and soybean meal-based and the phosphorus (P) was supplemented through different phosphate sources: dicalcium (FBC), monodicalcium (MBC), triple superphosphate (ST), simple superphosphate (SS), Catalão rock (ROCHA) and phosphoric acid (AcF) and diet control without supplemental P (CONT). Phosphorus […]

Twenty four male castrated pigs, 45.95 kg of weight live, were used to determine the minimum fecal endogenous phosphorus losses, the rate of true absorption feed and the biological availability of various phosphate sources. A complete randomized block design, with six treatments and four replicates with one animal per experimental unit, was used. The diets were based on corn and soybean meal. The phosphorus supplement of the following sources were used: dicalcium (BIC); Tapira (TAP); Patos Minas (FPM); monoammonium (MAP) […]

The experiment was designed to simulate the mathematical models that relate to the phophorus (P) flow, considering the hypotheses that the endogenous phosphorus from digestive tract was absorbed in the same proportion of the dietary phosphorus and that the input and output flow of this mineral in the compartments was constant. The variables absorption, retention, endogenous P that returns to the gastrointestinal tract (GIT), dietary absorbed P, accretion, reabsorption and balance of P in bone and in soft tissues and […]

ABSTRACT – This experiment was carried out to determine the endogenous fecal losses of P and the effect of phytase on the biological availability of P in the diets and in the whole rice meal (WRM) for growing swines, by means of the isotopic dilution technique. The barrows were allotted to a complete randomized experimental design, with four treatments and three replicates. The treatments consisted on two diets without WRM (with or without 1250 FTU [Unit of Phytase Activity]/kg diet), […]

This research was conducted to study the kinetic of phosphorus (P) in tissue of swine growing phase fed diets containing crescent levels of total phosphorus (.30, .40, .51, .65 e .73%), using 32P as tracer. The rate of 32P retention and the relative specific activity and standard in the bone, liver, heart, kidney and muscle were the markers of inorganic P concentration. Ten commercial crossbred barrows, with 20 kg, were allotted to a completely randomized design in a split plot […]

This research was conducted to determine the minimum endogenous losses, the nutritional requirement of phosphorus (P) for maintenance, the biological availability of P from dicalcium phosphate and the variation of plasma P concentration in swine of 20 kg LW. The pigs were fed diets containing different levels of total phosphorus (.30, .40, .51, .65 and .73%). Twenty commercial crossbred barrows were maintained in metabolic cages for a seven-day period of adaptation and seven days of total collection of feces, urine […]