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| Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha : |
03/09/2019 |
Actualizado : |
28/04/2021 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
RABAZA, A.; BANCHERO, G.; CAJARVILLE,C.; ZUNINO, P.; BRITO, A.; REPETTO, J.; FRAGA, M. |
Afiliación : |
ANA VIRGINIA RABAZA MARTINEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CECILIA CAJARVILLE, Departamento de Nutrición Animal, Facultad de Veterinaria, Universidad de la República, San José, Uruguay; PABLO ZUNINO, MEC/ IIBCE (Instituto de Investigaciones de Ciencias Biológicas "Clemente Estable"), Montevideo, Uruguay.; Departamento de Nutriciion Animal, Instituto de Produccion Animal, Facultad de Veterinaria, Universidad de la República, Ruta 1 km 42.5, San José 80100, Uruguay.; JOSE LUIS REPETTO CAPELLO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.//Departamento de Bovinos, Instituto de Producción Animal, Facultad de Veterinaria, Universidad de la República, Ruta 1 km 42, CP 80100 San José, Uruguay.; MARTIN FRAGA COTELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Effects of feed withdrawal duration on animal behaviour, rumen microbiota and blood chemistry in feedlot cattle: implications for rumen acidosis. |
Fecha de publicación : |
2019 |
Fuente / Imprenta : |
Animal, Volume 14 , Issue 1 , January 2020 , pp. 66 - 77. DOI: https://doi.org/10.1017/S1751731119001538 |
DOI : |
10.1017/S1751731119001538 |
Idioma : |
Inglés |
Notas : |
Article history: Received 22 October 2018 // Accepted 13 June 2019. |
Contenido : |
Abstracts: Feed withdrawal ( FW ) is a frequent issue in open outdoor feedlot systems, where unexpected circumstances can limit the animals? access to food. The relationship among fasting period, animal behaviour during feed reintroduction ( FR ) and acidosis occurrence has not been completely elucidated. Twenty steers fitted with rumen catheters were fed a high-concentrate diet (concentrate : forage ratio 85 : 15) and were challenged by a protocol of FW followed by FR. The animals were randomly assigned to one of the four treatments: FW for 12 h ( T12 ), 24 h ( T24 ), 36 h ( T36 ) or no FW (control group) followed by FR. The steers? behaviour, ruminal chemistry, structure of the ruminal microbial community, blood enzymes and metabolites and ruminal acidosis status were assessed. Animal behaviour was affected by the FW?FR challenge (P<0.05). Steers from the T12, T24 and T36 treatments showed a higher ingestion rate and a lower frequency of rumination. Although all animals were suspected to have sub-acute ruminal acidosis ( SARA ) prior to treatment, a severe case of transient SARA arose after FR in the T12, T24 and T36 groups. The ruminal pH remained below the threshold adopted for SARA diagnosis (pH value=5.6) for more than three consecutive hours (24, 7 and 19 h in the T12, T24 and T36 treatments, respectively). The FW?FR challenge did not induce clinical acute ruminal acidosis even though steers from the T36 treatment presented ruminal pH values that were consistent with this metabolic disorder (pH threshold for acute acidosis=5.2). Total mixed ration reintroduction after the withdrawal period reactivated ruminal fermentation as reflected by changes in the fermentation end-products. Ruminal lactic acid accumulation in steers from the T24 and T36 treatments probably led to the reduction of pH in these groups. Both the FW and the FR phases may have altered the structure of the ruminal microbiota community. Whereas fibrolytic bacterial groups decreased relative abundance in the restricted animals, both lactic acid producer and utiliser bacterial groups increased (P<0.05). The results demonstrated a synchronisation between Streptococcus (lactate producer) and Megasphaera (lactate utiliser), as the relative abundance of both groups increased, suggesting that bacterial resilience may be central for preventing the onset of metabolic disturbances such as ruminal acidosis. A long-FW period (36 h) produced rumen pH reductions well below and lactic acid concentration increased well above the accepted thresholds for acute acidosis without any perceptible clinical signs. MenosAbstracts: Feed withdrawal ( FW ) is a frequent issue in open outdoor feedlot systems, where unexpected circumstances can limit the animals? access to food. The relationship among fasting period, animal behaviour during feed reintroduction ( FR ) and acidosis occurrence has not been completely elucidated. Twenty steers fitted with rumen catheters were fed a high-concentrate diet (concentrate : forage ratio 85 : 15) and were challenged by a protocol of FW followed by FR. The animals were randomly assigned to one of the four treatments: FW for 12 h ( T12 ), 24 h ( T24 ), 36 h ( T36 ) or no FW (control group) followed by FR. The steers? behaviour, ruminal chemistry, structure of the ruminal microbial community, blood enzymes and metabolites and ruminal acidosis status were assessed. Animal behaviour was affected by the FW?FR challenge (P<0.05). Steers from the T12, T24 and T36 treatments showed a higher ingestion rate and a lower frequency of rumination. Although all animals were suspected to have sub-acute ruminal acidosis ( SARA ) prior to treatment, a severe case of transient SARA arose after FR in the T12, T24 and T36 groups. The ruminal pH remained below the threshold adopted for SARA diagnosis (pH value=5.6) for more than three consecutive hours (24, 7 and 19 h in the T12, T24 and T36 treatments, respectively). The FW?FR challenge did not induce clinical acute ruminal acidosis even though steers from the T36 treatment presented ruminal pH values that were consistent with ... Presentar Todo |
Palabras claves : |
ACIDOSIS RUMINAL; ENGORDE DE BOVINOS; FATTENING; FOOD RESTRICTION; LIVESTOCK; PLATAFORMA DE SALUD ANIMAL; RESTRICCIÓN NUTRICIONAL; RUMINAL ENVIRONMENT; SUB-ACUTE RUMINAL ACIDOSIS. |
Thesagro : |
COMPORTAMIENTO ANIMAL; GANADO BOVINO. |
Asunto categoría : |
L02 Alimentación animal |
Marc : |
LEADER 03782naa a2200349 a 4500 001 1060132 005 2021-04-28 008 2019 bl uuuu u00u1 u #d 024 7 $a10.1017/S1751731119001538$2DOI 100 1 $aRABAZA, A. 245 $aEffects of feed withdrawal duration on animal behaviour, rumen microbiota and blood chemistry in feedlot cattle$bimplications for rumen acidosis.$h[electronic resource] 260 $c2019 500 $aArticle history: Received 22 October 2018 // Accepted 13 June 2019. 520 $aAbstracts: Feed withdrawal ( FW ) is a frequent issue in open outdoor feedlot systems, where unexpected circumstances can limit the animals? access to food. The relationship among fasting period, animal behaviour during feed reintroduction ( FR ) and acidosis occurrence has not been completely elucidated. Twenty steers fitted with rumen catheters were fed a high-concentrate diet (concentrate : forage ratio 85 : 15) and were challenged by a protocol of FW followed by FR. The animals were randomly assigned to one of the four treatments: FW for 12 h ( T12 ), 24 h ( T24 ), 36 h ( T36 ) or no FW (control group) followed by FR. The steers? behaviour, ruminal chemistry, structure of the ruminal microbial community, blood enzymes and metabolites and ruminal acidosis status were assessed. Animal behaviour was affected by the FW?FR challenge (P<0.05). Steers from the T12, T24 and T36 treatments showed a higher ingestion rate and a lower frequency of rumination. Although all animals were suspected to have sub-acute ruminal acidosis ( SARA ) prior to treatment, a severe case of transient SARA arose after FR in the T12, T24 and T36 groups. The ruminal pH remained below the threshold adopted for SARA diagnosis (pH value=5.6) for more than three consecutive hours (24, 7 and 19 h in the T12, T24 and T36 treatments, respectively). The FW?FR challenge did not induce clinical acute ruminal acidosis even though steers from the T36 treatment presented ruminal pH values that were consistent with this metabolic disorder (pH threshold for acute acidosis=5.2). Total mixed ration reintroduction after the withdrawal period reactivated ruminal fermentation as reflected by changes in the fermentation end-products. Ruminal lactic acid accumulation in steers from the T24 and T36 treatments probably led to the reduction of pH in these groups. Both the FW and the FR phases may have altered the structure of the ruminal microbiota community. Whereas fibrolytic bacterial groups decreased relative abundance in the restricted animals, both lactic acid producer and utiliser bacterial groups increased (P<0.05). The results demonstrated a synchronisation between Streptococcus (lactate producer) and Megasphaera (lactate utiliser), as the relative abundance of both groups increased, suggesting that bacterial resilience may be central for preventing the onset of metabolic disturbances such as ruminal acidosis. A long-FW period (36 h) produced rumen pH reductions well below and lactic acid concentration increased well above the accepted thresholds for acute acidosis without any perceptible clinical signs. 650 $aCOMPORTAMIENTO ANIMAL 650 $aGANADO BOVINO 653 $aACIDOSIS RUMINAL 653 $aENGORDE DE BOVINOS 653 $aFATTENING 653 $aFOOD RESTRICTION 653 $aLIVESTOCK 653 $aPLATAFORMA DE SALUD ANIMAL 653 $aRESTRICCIÓN NUTRICIONAL 653 $aRUMINAL ENVIRONMENT 653 $aSUB-ACUTE RUMINAL ACIDOSIS 700 1 $aBANCHERO, G. 700 1 $aCAJARVILLE,C. 700 1 $aZUNINO, P. 700 1 $aBRITO, A. 700 1 $aREPETTO, J. 700 1 $aFRAGA, M. 773 $tAnimal, Volume 14 , Issue 1 , January 2020 , pp. 66 - 77. DOI: https://doi.org/10.1017/S1751731119001538
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INIA La Estanzuela (LE) |
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| Acceso al texto completo restringido a Biblioteca INIA Tacuarembó. Por información adicional contacte bibliotb@tb.inia.org.uy. |
Registro completo
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Biblioteca (s) : |
INIA Tacuarembó; INIA Treinta y Tres. |
Fecha actual : |
18/10/2018 |
Actualizado : |
11/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
LOPEZ VALIENTE, S.; MARESCA, S.; RODRÍGUEZ, A.M.; PALLADINO, R.A.; LACAU-MENGIDO, I.M.; LONG, N.M.; QUINTANS, G. |
Afiliación : |
S. LÓPEZ VALIENTE, National Institute of Agricultural Technology (INTA). Experimental Station of Cuenca del Salado.; S. MARESCA, National Institute of Agricultural Technology (INTA). Experimental Station of Cuenca del Salado.; A.M. RODRÍGUEZ, National Institute of Agricultural Technology (INTA). Experimental Station of Cuenca del Salado.; R.A. PALLADINO, Facultad de Agronomía, Universidad de Buenos Aires. Facultad de Ciencias Agrarias, Universidad Nacional de Lomas de Zamora, Buenos Aires.; I.M. LACAU-MENGIDO, Laboratorio de Regulación Hipofisaria, Instituto de Biología y Medicina Experimental (CONICET).; N.M. LONG, Department of Animal and Veterinary Sciences. Clemson University.; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Effect of protein restriction of Angus cows during late gestation: subsequent reproductive performance and milk yield. |
Fecha de publicación : |
2018 |
Fuente / Imprenta : |
The Professional Animal Scientist, 2018, 34(3): 261-268. |
DOI : |
10.15232/pas.2017-01701 |
Idioma : |
Inglés |
Contenido : |
Abstract:
The effect of level of CP fed during late gestation on reproductive performance and milk production was studied in multiparous cows. Sixty-eight pregnant Angus cows were used. At 121 d prepartum, cows were blocked by BW (409 ± 57 kg) and expected calving date, randomly assigned to a low-protein (LP = 6% CP) or high-protein diet (HP = 12% CP), and allocated to 12 pens per treatment.
After parturition, all cows were managed in a single group until weaning. Body weight and BCS were determined at the start of the experiment, at calving, and at weaning.
Nonesterified fatty acids, insulin, IGF-1, and glucose were determined every 24 d prepartum and nonesterified fatty acids and glucose every 38 d postpartum. Progesterone was quantified weekly to indicate luteal activity and estimate interval to first estrus. Milk production was measured until weaning. The HP cows had greater BW gain during the prepartum period (P < 0.01) and tended to gain more BCS (P = 0.06) than LP cows. The prepartum diet did not affect gestation length (P = 0.44) or interval from calving to the onset of luteal activity (P = 0.35).
Pregnancy rates, milk quality, and production were not influenced by dietary treatments. Cows in the HP treatment had greater prepartum serum urea concentrations than LP treatment (P < 0.05). In conclusion, protein level prepartum in multiparous beef cows affected the BW change at calving, without consequences on reproductive performance and milk quality and yield. |
Palabras claves : |
LATE GESTATION; MILK YIELD; MULTIPAROUS COW; POSTPARTUM REPRODUCTIVE PERFORMANCE; PROTEIN RESTRICTION; VACAS MULTÍPARAS. |
Thesagro : |
BOVINOS; VACAS. |
Asunto categoría : |
L10 Genética y mejoramiento animal |
Marc : |
LEADER 02405naa a2200301 a 4500 001 1059651 005 2019-10-11 008 2018 bl uuuu u00u1 u #d 024 7 $a10.15232/pas.2017-01701$2DOI 100 1 $aLOPEZ VALIENTE, S. 245 $aEffect of protein restriction of Angus cows during late gestation$bsubsequent reproductive performance and milk yield.$h[electronic resource] 260 $c2018 520 $aAbstract: The effect of level of CP fed during late gestation on reproductive performance and milk production was studied in multiparous cows. Sixty-eight pregnant Angus cows were used. At 121 d prepartum, cows were blocked by BW (409 ± 57 kg) and expected calving date, randomly assigned to a low-protein (LP = 6% CP) or high-protein diet (HP = 12% CP), and allocated to 12 pens per treatment. After parturition, all cows were managed in a single group until weaning. Body weight and BCS were determined at the start of the experiment, at calving, and at weaning. Nonesterified fatty acids, insulin, IGF-1, and glucose were determined every 24 d prepartum and nonesterified fatty acids and glucose every 38 d postpartum. Progesterone was quantified weekly to indicate luteal activity and estimate interval to first estrus. Milk production was measured until weaning. The HP cows had greater BW gain during the prepartum period (P < 0.01) and tended to gain more BCS (P = 0.06) than LP cows. The prepartum diet did not affect gestation length (P = 0.44) or interval from calving to the onset of luteal activity (P = 0.35). Pregnancy rates, milk quality, and production were not influenced by dietary treatments. Cows in the HP treatment had greater prepartum serum urea concentrations than LP treatment (P < 0.05). In conclusion, protein level prepartum in multiparous beef cows affected the BW change at calving, without consequences on reproductive performance and milk quality and yield. 650 $aBOVINOS 650 $aVACAS 653 $aLATE GESTATION 653 $aMILK YIELD 653 $aMULTIPAROUS COW 653 $aPOSTPARTUM REPRODUCTIVE PERFORMANCE 653 $aPROTEIN RESTRICTION 653 $aVACAS MULTÍPARAS 700 1 $aMARESCA, S. 700 1 $aRODRÍGUEZ, A.M. 700 1 $aPALLADINO, R.A. 700 1 $aLACAU-MENGIDO, I.M. 700 1 $aLONG, N.M. 700 1 $aQUINTANS, G. 773 $tThe Professional Animal Scientist, 2018, 34(3): 261-268.
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