EFEITO DE NÍVEIS DE FÓSFORO NÃO-FÍTICO E DE FITASE SOBRE A TÍBIA DE FRANGOS DE CORTE

摘要: It was evaluated the effect of nonphytate phosphorus (NNP) and phytase on broiler tibia. One thousand two hundred chicks were allocated in a completely randomized design factorial arrangement 4 x 3 (NPP levels), with four replicates. NPP levels, at each phase, 0.45, 0.37, 0.29 0.21% - initial, 0.41, 0.33, 0.25 0.17% growth, 0.29, 0.21 0.13% withdrawal. Phytase levels 0, 500 1000 FTU/kg diet. There no diameter 21 days age. Tibia lower weight, length diaphysis, distal epiphysis average densities e proximal density resulted from reduction 0.37 to 0.29% 0.21%, respectively. Inclusion improved diaphysis tibia, independent levels. Diets NPP, growth final phases, 0.33 0.29%, respectively, supplemented phytase, can be used negative bone quality broilers.