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'Meta-analysis of dry matter intake and neutral detergent fiber intake of hair sheep raised in tropical areas'.
Oliveira, Alessandra Pinto de; Cunha, Camila Soares; Pereira, Elzânia Sales; Biffani, Stefano; Medeiros, Ariosvaldo Nunes de; Silva, Aderbal Marcos de Azevedo; Marcondes, Marcos Inácio.
Afiliación
  • Oliveira AP; Department of Animal Science, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil.
  • Cunha CS; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
  • Pereira ES; Department of Animal Science, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil.
  • Biffani S; Istituto di Biologia e Biotecnologia Agraria, Consiglio Nazionale delle Ricerche, Lodi, Italia.
  • Medeiros AN; Department of Animal Science, Universidade Federal da Paraíba, Areia, Paraíba, Brazil.
  • Silva AMA; Rural Health and Technology Center, Universidade Federal de Campina Grande, Patos, Paraíba, Brazil.
  • Marcondes MI; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
PLoS One ; 15(12): e0244201, 2020.
Article en En | MEDLINE | ID: mdl-33351827
Inadequate estimates of fiber and dry matter intake of sheep raised in tropical conditions may explain part of the inefficiency of those production systems. Therefore, we aimed to estimate dry matter intake (DMI) and neutral detergent fiber intake (NDFI) of hair sheep raised under tropical conditions. A meta-analysis of 61 independent performance experiments, comprising a total of 413 experimental units (treatment means or animals), was performed. Trials were conducted in tropical conditions, using hair sheep in growing and finishing phases and endowed with the following information: neutral detergent fiber (NDF) in diet, initial and final body weight (BW), average daily gain (ADG), DMI and NDFI of treatment means (51 studies) or individual data (10 studies). Data on organic matter and NDF digestibilities were collected to estimate D-value (Dv) and B-value (Bv) (20 and 33 studies, respectively). The equations obtained were: [Formula: see text] DMI (g/kg BW) as a function of Dv (g/kg DM) revealed a quadratic relationship, whose point of maximum DMI (38.69 g/kg BW) was obtained at 634.1 g/kg DM Dv. On the other hand, DMI decreased linearly as Bv (g/kg DM) increased. In conclusion, equations to predict DMI from BW and ADG as well to predict NDFI from dietary NDF were fitted with great accuracy and are recommended for hair sheep raised in tropical regions. DMI values were, in general, greater than those reported by the NRC, AFRC and INRA systems, which may be a reflection of the sheep breeds used in this study. Using Dv and Bv concepts was satisfactory to describe an integrated mechanism between metabolic and bulking regulation of DMI in sheep.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Clima Tropical / Ovinos / Fibras de la Dieta / Alimentación Animal Tipo de estudio: Prognostic_studies / Systematic_reviews Límite: Animals Idioma: En Revista: PLoS One Asunto de la revista: CIENCIA / MEDICINA Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Clima Tropical / Ovinos / Fibras de la Dieta / Alimentación Animal Tipo de estudio: Prognostic_studies / Systematic_reviews Límite: Animals Idioma: En Revista: PLoS One Asunto de la revista: CIENCIA / MEDICINA Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos