Reducing the demand for available phosphorus in diets with added phytase for 8-to-21-day-old male broilers

John Armando Parra

Universidade Federal de Viçosa

Luiz Fernando Teixeira

Universidade Federal de Viçosa

Horacio Santiago Rostagno

Universidade Federal de Viçosa

Melissa Izabel Hannas

Universidade Federal de Viçosa

Introduction: in formulating concentrates for broilers (fe), inorganic sources of phosphorus (P) are used. Phytic P (derived from vegetables in concentrates) and excess added inorganic P are eliminated in the stool and cause problems to the environment. The aim of this study was to evaluate the reduction of the demand for available phosphorus (Pd) in 8-to-21-day-old male fe subject to three levels of Pd with phytase (500 FTU kg -1 of concentrate) on performance and bone parameters. Materials and methods: 480 Cobb® fe were used and distributed according to a completely randomized design. Pd levels were 0.391% (level of demand for male fe with medium performance) plus two levels: -10 % and +10%. The ratio between calcium and Pd was 2.13:1 (Ca:Pd). 8 replications of 20 birds per box were performed and an iso-nutrient diet was provided. Final weight, weight gain, concentrate intake, feed conversion, and ash, P and Ca contents in tibias were evaluated. Collected data were submitted to anova ; where there was a significant difference (P< 0.05), the treatment averages were compared by the snk test. Results:concentrate intake decreased (P=0.0265) at the level of 110%. As for bone mineralization, the 90% level resulted in lower ash (%), calcium (% e g) and P (% e g; P<0.05) contents. Conclusion: it is possible to decrease the demand for Pd in malefe when their performance has been evaluated. Also, diets containing 10% less than the demand for Pd in malefe meet the needs for animal bone mineralization.
Keywords: cálcio, desempenho, enzima, fitato, fosfato bicálcico, mineralizão óssea
Published
2015-06-01
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Parra , J. A., Teixeira , L. F., Rostagno, H. S., & Hannas, M. I. (2015). Reducing the demand for available phosphorus in diets with added phytase for 8-to-21-day-old male broilers. Spei Domus, 11(22). https://doi.org/10.16925/sp.v11i22.1152
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