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Graded levels of phytase on performance, bone mineralization and carcass traits of broiler fed reduced dicalcium phosphate

  • de Freitas, Henrique Barbosa (Faculty of Veterinary Medicine and Animal Sciences/ Federal University of Mato Grosso do Sul) ;
  • de Souza Nascimento, Karina Marcia Ribeiro (Faculty of Veterinary Medicine and Animal Sciences/ Federal University of Mato Grosso do Sul) ;
  • Kiefer, Charles (Faculty of Veterinary Medicine and Animal Sciences/ Federal University of Mato Grosso do Sul) ;
  • Gomes, Gilson Alexandre (ABVista) ;
  • Santos, Tiago Tedeschi dos (ABVista) ;
  • Garcia, Elis Regina Moraes (Graduate Program in Animal Science, Mato Grosso do Sul State University) ;
  • da Silva, Thiago Rodrigues (Faculty of Veterinary Medicine and Animal Sciences/ Federal University of Mato Grosso do Sul) ;
  • Paiva, Luanna Lopes (Faculty of Veterinary Medicine and Animal Sciences/ Federal University of Mato Grosso do Sul) ;
  • Berno, Patricia Rodrigues (Faculty of Veterinary Medicine and Animal Sciences/ Federal University of Mato Grosso do Sul)
  • Received : 2018.03.19
  • Accepted : 2018.07.16
  • Published : 2019.05.01

Abstract

Objective: This study was conducted to assess increasing doses of phytase added to broiler diets formulated with different levels of available phosphorus (avP), calcium (Ca), and sodium (Na), and the respective effects on performance parameters, quantitative carcass characteristics, ash and phosphorus deposition in tibia and weight of organs. Methods: Three different matrices were assumed for phytase with the following nutritional values: matrix A (MT A): 0.165% Ca, 0.150% avP, and 0.035% Na; matrix B (MT B): 0.215% Ca, 0.195% avP, and 0.045% Na; matrix C (MT C): 0.245% Ca, 0.225% avP, and 0.053% Na. There were six different diets: No phytase (formulated to meet the nutritional requirements); phytase 500 FTU/kg+MT A; phytase 1,000 FTU/kg+MT A; phytase 1,500 FTU/kg+MT A; phytase 1,000 FTU/kg+MT B and phytase 1,500 FTU/kg+MT C. Results: There was no significant phytase influence on performance, quantitative carcass characteristics, ash and phosphorus deposition in tibia and weight of the organ throughout the study period, however, it was possible to observe a tendency of improvement in body weight corrected feed conversion for broilers fed the phytase 1,500+MT C diet, where potentially these birds were more efficient on utilize phytic phosphorus and other nutrients bounded to phytate molecule, translating into improvement in performance, and there was also a non significant numerical improvement in body weight corrected feed conversion of broilers fed this diet. Conclusion: Broilers fed with diets formulated with different levels of avP, Ca, and Na and increasing doses of phytase have shown no change on performance, quantitative carcass characteristics, ash and phosphorus deposition in tibia and weight of organs.

Keywords

Amino Acids;Enzyme;Phosphorus;Phytic Acid

Acknowledgement

Supported by : company AB Vista

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