Artículo

Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine

Facultad de Medicina Veterinaria y Zootecnia, UNAM, publicado en Veterinaria México OA, y cosechado de Revistas UNAM

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Procedencia del contenido

Entidad o dependencia
Facultad de Medicina Veterinaria y Zootecnia, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine. (2018). Veterinaria México OA; Vol 5, No 3, 2018. Recuperado de https://repositorio.unam.mx/contenidos/60444

Descripción del recurso

Colaborador(es)
Arce Menocal, J. ; Ávila González, Ernesto ; Martinez Rojas, Ingrid Yolani ; López Coello, Carlos ; Gomes, G. A.
Afiliación del colaborador
AB Vista, Marlborough, Wiltshire, UK; Facultad de Medicina Veterinaria y Zootecnia, Universidad Michoacana de San Nicolás Hidalgo, Morelia, México; Departamento de Medicina y Zootecnia de Aves, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, CDMX, México
Tipo
Artículo de Investigación
Área del conocimiento
Biotecnología y Ciencias Agropecuarias
Título
Effect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine
Fecha
2018-08-07
Resumen
Veterinaria México OA ISSN: 2448-6760 Cite this as: • Martínez Rojas IY, López Coello C, Ávila González E, Arce Menocal J, Gomes GA. ffect of phytase dose on productive performance and bone status of layers fed with graded levels of digestible lysine. Veterinaria México OA. 2015;5(3). doi:10.22201/fmvz.24486760e.2018.3.564. Exogenous phytase could influence dietary protein availability by variation in using dose. The objective of the present study was to determine if incremental dosing of an evolved E.coli 6-phytase would lead to improvements in lysine availability through evaluating performance and bone status in Bovans White layers. A total of 182 layers were placed in individual cages and distributed to 13 treatments: a 3×4 factorial arrangement with three levels of digestible lysine (dLys - 0.67, 0.77, and 0.87 %) and four doses of phytase (0, 300, 1 200, and 4 800 FTU/kg) in 0.12 % available P (avP) diets. Additionally, one phytase-free control treatment was included with 0.25 % avP and 0.87 % dLys. Productive parameters were recorded for 25 weeks, from 39 week-old. At the end, abdominal fat deposition and the tibia were sampled; in bone was determined breaking strength and bone ash. Layers fed 1 200 FTU/kg phytase increased egg production percentage (F3,169 = 2.01, p = 0.019), abdominal fat deposition (F3,169 = 2.52, p = 0.059), bone breaking strength (F3,169 = 4.29, p = 0.006) and bone ash weight (F3,169 = 3.62, p = 0.015) compared with non-phytase inclusion. Furthermore, 1 200 FTU/kg phytase decreased incidence of broken eggs and soft-shell eggs (F3,169 = 2.9, p = 0.037). Phytase and dLys levels influenced egg mass and bone ash concentration (F12,169 = 1.86, p = 0.043). FCR and body weight loss was reduced with phytase inclusion (respectively: F12,169 = 2.43, p = 0.045, and F12,169 = 2.24, p = 0.001). Phytase-free control diet increased egg weight (F12,169 = 3.70, p < 0.068), but gave greater BW loss (F12,169 = 17.79, p < 0.001), less abdominal fat content (F12,169 = 5.85, p < 0.017), and no effect on other variables (p > 0.07). In conclusion, 1 200 FTU/kg of phytase improved productive performance and preserved body weight and bone status, without equivalence of phytase inclusion for dLys level, even with higher doses. Figure A. Response of egg marketable mass
Tema
bone parameters; digestible lysine; laying hens; phytase dose; productive performance
Idioma
eng
ISSN
2448-6760

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