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dc.contributor.author
Arroquy, Jose Ignacio  
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Nazareno, Mónica Azucena  
dc.contributor.author
Avila, M.  
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Garcia, M.  
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Cervetto, J.  
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Distel, Roberto Alejandro  
dc.contributor.author
Saravia, J. J.  
dc.date.available
2023-06-08T18:20:45Z  
dc.date.issued
2012-05  
dc.identifier.citation
Arroquy, Jose Ignacio; Nazareno, Mónica Azucena; Avila, M.; Garcia, M.; Cervetto, J.; et al.; Discontinuous roughage delivery on digestion, rumen metabolism, feed efficiency and liveweight gain of beef steers fed a concentrate diet; Fundación del Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria; Livestock Research For Rural Development; 24; 5; 5-2012; 1-16  
dc.identifier.issn
0121-3784  
dc.identifier.uri
http://hdl.handle.net/11336/200024  
dc.description.abstract
Two experiments were carried out to study the effect of feeding a total mixed ration (TMR) compared to feeding the roughage portion of the diet once every two days and separated of the daily delivered concentrate mixture on dry matter intake, nutrient digestibility, ruminal metabolism, feed efficiency and liveweight gain. In Trial 1, thirty beef steers (Braford and Braford × Criollo; initial BW = 259 ± 27 kg) were used in a 69-d feeding trial. Treatments were: total mixed ration (TMR), and the same proportion of ingredients for the ration but roughage offered once every 2-d and separated from the daily delivered concentrate portion of the diet (REOD). Treatments were arranged in a completely randomized design (three pens/ treatment). In both treatments, daily offered ration had on dry matter basis 90% concentrate and 10% grass hay (Setaria italica). Average daily gain (ADG) did not differ among treatment (1013 vs. 1080 g/d for TMR vs. REOD respectively; SEM = 95 g/d). Dry matter intake was greater in TMR compared to REOD (P < 0.01). Gain to feed ratio tended to be better for REOD than TMR (P = 0.07). In Trial 2, four rumen cannulated steers (Braford) were used in an experiment with a crossover design. Treatments were arranged as a 2*2 factorial design, where the first factor consisted of roughage level (RL): (R14) 14% roughage: 86% concentrate and (R7) 7% roughage: 93% concentrate. The second factor was roughage delivery system (RDS; as it was described for Trial 1): TMR and REOD. There were no RL*RDS interactions for intake and digestion (OM, CP, NDF and starch). Both RL were similar for intake and digestion. Roughage delivery system did not significantly affect intake and digestion of OM, CP, NDF, and starch measured by total fecal collection. Total organic acids (TOA), acetate to propionate ratio (A:P), pH, and rumen ammonia concentrations were not affected by RL and RDS. In conclusion, under the conditions of these trials, steers fed a separated roughage source once every 2-d had similar ADG, and tended to be more efficient compared with TMR. Total tract digestibility and rumen environment traits (pH, VFA, and ammonia) were not affected in response to discontinuous roughage delivery.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Fundación del Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
ANIMAL NUTRITION  
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FEEDING MANAGEMENT  
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RUMEN AMMONIA  
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RUMINAL FERMENTATION  
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ROUGHAGE DELIVERY  
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Ganadería  
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Producción Animal y Lechería  
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CIENCIAS AGRÍCOLAS  
dc.title
Discontinuous roughage delivery on digestion, rumen metabolism, feed efficiency and liveweight gain of beef steers fed a concentrate diet  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2023-06-07T11:50:34Z  
dc.identifier.eissn
2521-9952  
dc.journal.volume
24  
dc.journal.number
5  
dc.journal.pagination
1-16  
dc.journal.pais
Colombia  
dc.journal.ciudad
Cali  
dc.description.fil
Fil: Arroquy, Jose Ignacio. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Tucumán-Santiago del Estero; Argentina. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Santiago del Estero. Universidad Nacional de Santiago del Estero. Centro de Investigaciones y Transferencia de Santiago del Estero; Argentina  
dc.description.fil
Fil: Nazareno, Mónica Azucena. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Santiago del Estero. Universidad Nacional de Santiago del Estero. Centro de Investigaciones y Transferencia de Santiago del Estero; Argentina  
dc.description.fil
Fil: Avila, M.. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Tucumán-Santiago del Estero; Argentina  
dc.description.fil
Fil: Garcia, M.. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina  
dc.description.fil
Fil: Cervetto, J.. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina  
dc.description.fil
Fil: Distel, Roberto Alejandro. Universidad Nacional del Sur; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina  
dc.description.fil
Fil: Saravia, J. J.. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Tucumán-Santiago del Estero; Argentina  
dc.journal.title
Livestock Research For Rural Development  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.lrrd.org/lrrd24/5/arro24085.htm