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Effects of Phytase Inclusion in Broiler Breeder Diets During Early Lay on their Fecal and Egg Characteristics
Arguelles-Ramos, M; Nusairat, B; Qudsieh, R; Brake, J.
Afiliação
  • Arguelles-Ramos, M; Clemson University. Department of Animal and Veterinary Science. Clemson. US
  • Nusairat, B; Jordan University of Science and Technology. College of Agriculture. Department of Animal Production. Irbid. JO
  • Qudsieh, R; North Carolina State University. Prestage Department of Poultry Science. Raleigh. US
  • Brake, J; North Carolina State University. Prestage Department of Poultry Science. Raleigh. US
Rev. bras. ciênc. avic ; 22(1): eRBCA, 2020. tab, graf, ilus
Article em En | VETINDEX | ID: biblio-1490726
Biblioteca responsável: BR68.1
Localização: BR68.1
ABSTRACT
This study investigated the effects of phytase inclusion in broiler breeder diets on fecal and egg characteristics. A total of 48 female broiler breeders were evaluated in this study from 21 to 31 weeks of age. The dietary treatments were fed from 30 to 31 wks of age, and included a Positive Control (PosCon) diet, containing 3.0% calcium and 0.50% available phosphorus (AvP); a Negative Control (NegCon) diet, with 3.0% calcium and 0.25% AvP; Negative Control diet + 275 FTU/kg phytase (NegCon+275), and Negative control diet + 550 FTU/kg phytase (NegCon+550). Egg, yolk, albumin, and eggshell weight, albumin height, and eggshell thickness were measured. Fecal parameters included fecal moisture, liquid portion, and mineral content. After 14 d on the experimental diets during the onset of lay, the NegCon+550 diet increased (p 0.01) fecal moisture content. In general, hens fed the highest enzyme level (NegCon+550) excreted fewer (p 0.05) divalent and trivalent cations, which included Al, Fe, Mg, Mn, and Zn. Fecal Na and K levels were not affected by dietary treatments. The NegCon+550 diet increased fecal P when compared with the NegCon and the NegCon+275 diets. The NegCon+550 and PosCon diets exhibited similar fecal P. No significant effects on egg characteristics were observed. It was concluded that during early lay, various signs of fecal changes would probably be observed at phytase dosages above approximately 500 FTU/kg characterized by increased fecal moisture content and excretion of P in broiler breeders.
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Texto completo: 1 Base de dados: VETINDEX Assunto principal: Óvulo / Galinhas / Coliformes / Ração Animal Limite: Animals Idioma: En Revista: Rev. bras. ciênc. avic Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Base de dados: VETINDEX Assunto principal: Óvulo / Galinhas / Coliformes / Ração Animal Limite: Animals Idioma: En Revista: Rev. bras. ciênc. avic Ano de publicação: 2020 Tipo de documento: Article