作者: Erin Caperuto de Almeida , Elisangela Minati Gomide , Paulo Borges Rodrigues , Antônio Gilberto Bertechini , Rilke Tadeu Fonseca de Freitas
DOI: 10.1590/S1516-35982011001100018
关键词:
摘要: In performance and metabolism trials, diets with reduced levels of crude protein, calcium available phosphorus on the performance, carcass characteristics, tibia ashes, balance retention nitrogen broiler chickens in phase from 8 to 21 35 days were evaluated. each phase, 30 25 birds per experimental unit used assay five three assay, respectively, a completely randomized design, six replications. Treatments consisted diet 21% protein without phytase (control), formulated nutritional recommended Brazilian tables, 21, 20, 19 18% (8 days) days, control had 20% others 19, 18, 17% phytase. (80 g Ronozyme NP(M) ton diet), level was 0.15 0.30 percentage points relation diet. No effect observed reduction nutrients feed intake, weight gain, or conversion either for study characteristics days. However, higher abdominal fat when broilers fed lower level. The excretion decreased received these nutrients. Ash not influenced by treatments. It is possible reduce level, phosphorus, up 3, are supplemented amino acids, respectively.