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

    DOI: https://doi.org/10.16925/sp.v11i22.1152
    Vol. 11 No. 22 (2015)
    Published: 2015-06-01
    John Armando Parra
    Luiz Fernando Teixeira
    Horacio Santiago Rostagno
    Melissa Izabel Hannas
    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.
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    How to Cite

    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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