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dc.contributor.author Gado, H.M.
dc.contributor.author Salem, A.Z.M.
dc.contributor.author Robinson, P.H.
dc.contributor.author Hassand, M.
dc.date.accessioned 2017-03-14T16:48:43Z
dc.date.available 2017-03-14T16:48:43Z
dc.date.issued 2009-07-23
dc.identifier.uri http://hdl.handle.net/20.500.11799/65931
dc.description.abstract This experiment studied effects of a mixture of exogenous enzymes (ZADO®) from anaerobic bacteria on ruminal fermentation, feed intake, digestibility, as well as milk production and composition in cows fed total mixed rations (TMRs; 0.7 corn silage and 0.3 of a concentrate mixture). Twenty lactating multiparous Brown Swiss cows (500±12.4 kg live weight) were randomly assigned into two experimental groups of 10 immediately after calving and fed a TMR with or without (CTRL) addition of 40 g/cow/d of enzymes for 12 weeks. Addition of enzymes increased (P<0.05) rumen microbial N synthesis. Intake of dry matter (DM) and organic matter (OM) was positively influenced (P<0.05) by supplementation, and digestibility of all nutrients was higher (P<0.05) in the total tract of supplemented cows, although the magnitude of the improvement varied among nutrients, with the highest improvement in aNDFom and ADFom (418–584 and 401–532 g/kg respectively; P<0.05) than the other nutrients. Supplementation of enzymes also increased (P<0.05) rumen ammonia N and total short chain fatty acid (SCFA) concentrations, and individual SCFA proportions were also altered with an increase in acetate (61.0–64.8 mol/100 mol; P=0.05) before feeding, and acetate and propionate increased 3 h post-feeding (60.0–64.0 and 18.3–20.8 mol/100 mol respectively; P<0.05). Milk and milk protein production was higher (12.8–15.7 and 0.45–0.57 kg/d respectively; P<0.05) forcowsfed the ZADO® supplemented diet. This exogenous enzyme product, supplemented daily to the TMR of cows in early lactation, increased milk production due to positive effects on nutrient intake and digestibility, extent of ruminal fermentation and microbial protein synthesis. es
dc.language.iso eng es
dc.publisher Elsevier es
dc.rights closedAccess es
dc.rights https://creativecommons.org/licenses/by-nd/4.0/ es
dc.rights closedAccess es
dc.rights https://creativecommons.org/licenses/by-nd/4.0/ es
dc.subject ZADO® es
dc.subject Enzymes es
dc.subject Digestibility es
dc.subject SCFA es
dc.subject Rumen microbial protein es
dc.subject Milk production es
dc.title Influence of exogenous enzymes on nutrient digestibility, extent of ruminal fermentation as well as milk production and composition in dairy cows es
dc.type Artículo es
dc.provenance Científica es
dc.road Dorada es
dc.ambito Internacional es


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  • Título
  • Influence of exogenous enzymes on nutrient digestibility, extent of ruminal fermentation as well as milk production and composition in dairy cows
  • Autor
  • Gado, H.M.
  • Salem, A.Z.M.
  • Robinson, P.H.
  • Hassand, M.
  • Fecha de publicación
  • 2009-07-23
  • Editor
  • Elsevier
  • Tipo de documento
  • Artículo
  • Palabras clave
  • ZADO®
  • Enzymes
  • Digestibility
  • SCFA
  • Rumen microbial protein
  • Milk production
  • Los documentos depositados en el Repositorio Institucional de la Universidad Autónoma del Estado de México se encuentran a disposición en Acceso Abierto bajo la licencia Creative Commons: Atribución-NoComercial-SinDerivar 4.0 Internacional (CC BY-NC-ND 4.0)

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