Performance and bone quality of broiler chicken fed a diet with reduced nonphytate phosphorus with bacterial phytases

• Main Author: Dos Santos, Tatiane Souza [UNESP]
• Publication Date: 2019
• Other Authors: Denadai, Juliana Célia [UNESP], Sartori, Maria Márcia Pereira [UNESP], Júnior, João Martins Pizauro [UNESP], Aoyagi, Mônica Megumi [UNESP], Rezende, Juliana Cristina Ramos [UNESP], Serpa, Paola Gentile [UNESP], Muro, Everton Moreno [UNESP], de Santana-Eich, Mayara Rodrigues [UNESP], Pasquali, Guilherme Aguiar Mateus [UNESP], Dornelas, Lívia Carrasco [UNESP], Netto, Raimundo Gonçalves Ferreira [UNESP], Zanetti, Leonardo Henrique [UNESP], Pezzato, Antonio Celso [UNESP], Sartori, José Roberto [UNESP]
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1139/cjas-2018-0158; http://hdl.handle.net/11449/189625
• topic: Ash; Calcium; Densitometry; Phosphorus; Resistance

This study evaluated the effect of three phytases in reduced nonphytate phosphorus (NPP) diets. In total, 2100 male Cobb 500® chicks were distributed in a completely randomized design. Ten experimental diets were used: NPP1 reduction of 0.12% NPP plus phytase A, B, C, or without; NPP2 reduction of 0.22% NPP plus phytase A, B, C, or without; positive control diet, attending nutrient requirements; negative control diet, deficit of 0.10% NPP. The 2 × 4 + 2 (two levels NPP, three phytases or without, and two controls) design was used, and the means were compared by Tukey’s or Dunnet’s (p < 0.05) tests. There were significant interactions on day 21 for weight gain (p < 0.01), feed conversion ratio (p < 0.01), and day 35 for weight gain (p < 0.01), feed intake (p < 0.01), feed conversion ratio (p < 0.01), European production efficiency factor (p < 0.01), and it was shown that three phytases in NPP1 diet had the same result as positive control (PC) diet. NPP2 diets without phytase promoted high calcium (p < 0.01) and low phosphorus (p < 0.01) in plasma, and the significant interaction showed higher activity for alkaline phosphatase (p = 0.023). The significant interactions for resistance (p = 0.001) and ash (p < 0.01) of femur indicate that inclusion of phytases in diet NPP1 improved the availability of minerals, suggesting that this reduction plus phytase would be enough for better results.