Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition
The aim of this study was to evaluate the inclusion of alfalfa grazing during 8 h continuous or partitioned in 2 separated sessions of 4 h after each milking, on nutrient intake, digestibility, ruminal fermentation, feeding behavior, milk production, milk composition, and milk fatty acid profile, in...
Sábháilte in:
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| Rannpháirtithe: | , , |
| Formáid: | article |
| Teanga: | Béarla |
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2023
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| Rochtain ar líne: | https://hdl.handle.net/20.500.12008/48185 https://doi.org/10.3168/jds.2022-22743 |
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Níl clibeanna ann, Bí ar an gcéad duine le clib a chur leis an taifead seo!
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| _version_ | 1868890176858619904 |
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| author | Santana Fernández, Álvaro |
| author2 | Cajarville, Cecilia Mendoza Aguiar, Alejandro Repetto, José Luis |
| author2_role | author author author |
| author_browse | Cajarville, Cecilia Mendoza Aguiar, Alejandro Repetto, José Luis Santana Fernández, Álvaro |
| author_facet | Santana Fernández, Álvaro Cajarville, Cecilia Mendoza Aguiar, Alejandro Repetto, José Luis |
| author_role | author |
| collection | COLIBRI |
| dc.contributor.none.fl_str_mv | Santana Fernández Álvaro, Universidad de la República (Uruguay). Facultad de Veterinaria. Departamento de Producción Animal y Salud de Sistemas Productivos (IPAV) Cajarville Cecilia, Universidad de la República (Uruguay). Facultad de Veterinaria. Departamento de Producción Animal y Salud de Sistemas Productivos (IPAV) Mendoza Aguiar Alejandro, Instituto Nacional de Investigación Agropecuaria (INIA). Programa de Producción de Leche Repetto José Luis, Universidad de la República (Uruguay). Facultad de Veterinaria. Departamento de Producción Animal y Salud de Sistemas Productivos (IPAV) |
| dc.creator.none.fl_str_mv | Santana Fernández, Álvaro Cajarville, Cecilia Mendoza Aguiar, Alejandro Repetto, José Luis |
| dc.date.none.fl_str_mv | 2023 2025-02-05T15:30:44Z 2025-02-05T15:30:44Z |
| dc.format.none.fl_str_mv | 20 h application/pdf |
| dc.identifier.none.fl_str_mv | Santana Fernández, Á, Cajarville, C, Mendoza Aguiar, A y Repetto, J. Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition. Journal of Dairy Science. [en línea] 2023, 106(9), 6060-6079 https://hdl.handle.net/20.500.12008/48185 https://doi.org/10.3168/jds.2022-22743 |
| dc.language.none.fl_str_mv | en eng |
| dc.relation.none.fl_str_mv | Journal of Dairy Science, 2023, 106(9), 6060-6079 |
| dc.rights.none.fl_str_mv | info:eu-repo/semantics/openAccess Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0) |
| dc.source.none.fl_str_mv | reponame:COLIBRI instname:Universidad de la República instacron:Universidad de la República |
| dc.subject.none.fl_str_mv | VACAS LECHERAS PASTOREO ALIMENTACION DE LOS ANIMALES |
| dc.title.none.fl_str_mv | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| dc.type.none.fl_str_mv | Artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| description | The aim of this study was to evaluate the inclusion of alfalfa grazing during 8 h continuous or partitioned in 2 separated sessions of 4 h after each milking, on nutrient intake, digestibility, ruminal fermentation, feeding behavior, milk production, milk composition, and milk fatty acid profile, in late-lactation cows fed a partial mixed ration (PMR). Twelve dairy cows (193 ± 83 d in milk, 584 ± 71 kg of body weight) were housed in individual outdoor pens and assigned to treatments according to a 3 × 3 Latin square design replicated 4 times. The treatments were as follows: (1) control (T0), cows were fed a total mixed ration (TMR) provided ad libitum 20.0% crude protein (CP), 32.2% neutral detergent fiber (NDF); (2) fed a diet combining a PMR which had the same ingredient composition as the TMR (60% of ad libitum intake) + 1 session of 8 h of pasture (T8), continuous grazing alfalfa (Medicago sativa; 20.6% CP, 35.8% NDF) after the p.m. milking; and (3) PMR (60% of ad libitum intake) + 2 daily sessions of 4 h of access to pasture after each milking (T4+4). The experiment lasted 57 d and was divided into 3 periods of 19 d each. The first 12 d of each period was used for diet adaptation, and the last 7 d was used for data collection. No differences among treatments were observed for any of the productive variables, feeding efficiency, or purine derivatives excretion. Cows in T0 had greater intake and apparent digestibility of dry matter, organic matter, and nonfibrous carbohydrates compared with T4+4 and T8. Compared with T0, alfalfa grazing increased the concentration of C18:1 trans-11 and decreased those of C16:0 and C17:0 in milk fat. Cows in T4+4 consumed 1.1 more kg DM/d of alfalfa and N provided by alfalfa in the diet was 3 percentage points higher compared with T8 cows (266 vs. 229 g/d, respectively). In addition, T4+4 cows had a greater daily range of ruminal pH than T8 (0.73 vs. 0.93), and the highest concentrations of NH3-N were recorded during the a.m. grazing session while in T8 cows it occurred during the night. In conclusion, including 8 h of alfalfa grazing in T8 and T4+4 treatments allowed the substitution between 35.8 and 38.7% of the total dry matter intake (DMI) of a PMR (with a similar CP concentration to alfalfa) for pasture, maintaining milk solids production and increasing the C18:1 trans-11 of milk fat compared with a TMR in mid late–lactation cows. In an herbage plus PMR diet, splitting the 1 continuous grazing session of 8 h into 2 sessions of 4 h increased the proportion of energy and N provided by alfalfa pasture and reduced PMR intake, without modifying the total nutrient intake or productive performance of cows. |
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| identifier_str_mv | Santana Fernández, Á, Cajarville, C, Mendoza Aguiar, A y Repetto, J. Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition. Journal of Dairy Science. [en línea] 2023, 106(9), 6060-6079 |
| instacron_str | Universidad de la República |
| institution | Universidad de la República |
| instname_str | Universidad de la República |
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| oai_identifier_str | oai:colibri.udelar.edu.uy:20.500.12008/48185 |
| publishDate | 2023 |
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| rights_invalid_str_mv | Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0) |
| spelling | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and compositionSantana Fernández, ÁlvaroCajarville, CeciliaMendoza Aguiar, AlejandroRepetto, José LuisVACAS LECHERASPASTOREOALIMENTACION DE LOS ANIMALESThe aim of this study was to evaluate the inclusion of alfalfa grazing during 8 h continuous or partitioned in 2 separated sessions of 4 h after each milking, on nutrient intake, digestibility, ruminal fermentation, feeding behavior, milk production, milk composition, and milk fatty acid profile, in late-lactation cows fed a partial mixed ration (PMR). Twelve dairy cows (193 ± 83 d in milk, 584 ± 71 kg of body weight) were housed in individual outdoor pens and assigned to treatments according to a 3 × 3 Latin square design replicated 4 times. The treatments were as follows: (1) control (T0), cows were fed a total mixed ration (TMR) provided ad libitum 20.0% crude protein (CP), 32.2% neutral detergent fiber (NDF); (2) fed a diet combining a PMR which had the same ingredient composition as the TMR (60% of ad libitum intake) + 1 session of 8 h of pasture (T8), continuous grazing alfalfa (Medicago sativa; 20.6% CP, 35.8% NDF) after the p.m. milking; and (3) PMR (60% of ad libitum intake) + 2 daily sessions of 4 h of access to pasture after each milking (T4+4). The experiment lasted 57 d and was divided into 3 periods of 19 d each. The first 12 d of each period was used for diet adaptation, and the last 7 d was used for data collection. No differences among treatments were observed for any of the productive variables, feeding efficiency, or purine derivatives excretion. Cows in T0 had greater intake and apparent digestibility of dry matter, organic matter, and nonfibrous carbohydrates compared with T4+4 and T8. Compared with T0, alfalfa grazing increased the concentration of C18:1 trans-11 and decreased those of C16:0 and C17:0 in milk fat. Cows in T4+4 consumed 1.1 more kg DM/d of alfalfa and N provided by alfalfa in the diet was 3 percentage points higher compared with T8 cows (266 vs. 229 g/d, respectively). In addition, T4+4 cows had a greater daily range of ruminal pH than T8 (0.73 vs. 0.93), and the highest concentrations of NH3-N were recorded during the a.m. grazing session while in T8 cows it occurred during the night. In conclusion, including 8 h of alfalfa grazing in T8 and T4+4 treatments allowed the substitution between 35.8 and 38.7% of the total dry matter intake (DMI) of a PMR (with a similar CP concentration to alfalfa) for pasture, maintaining milk solids production and increasing the C18:1 trans-11 of milk fat compared with a TMR in mid late–lactation cows. In an herbage plus PMR diet, splitting the 1 continuous grazing session of 8 h into 2 sessions of 4 h increased the proportion of energy and N provided by alfalfa pasture and reduced PMR intake, without modifying the total nutrient intake or productive performance of cows.Santana Fernández Álvaro, Universidad de la República (Uruguay). Facultad de Veterinaria. Departamento de Producción Animal y Salud de Sistemas Productivos (IPAV)Cajarville Cecilia, Universidad de la República (Uruguay). Facultad de Veterinaria. Departamento de Producción Animal y Salud de Sistemas Productivos (IPAV)Mendoza Aguiar Alejandro, Instituto Nacional de Investigación Agropecuaria (INIA). Programa de Producción de LecheRepetto José Luis, Universidad de la República (Uruguay). Facultad de Veterinaria. Departamento de Producción Animal y Salud de Sistemas Productivos (IPAV)2025-02-05T15:30:44Z2025-02-05T15:30:44Z2023Artículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion20 happlication/pdfSantana Fernández, Á, Cajarville, C, Mendoza Aguiar, A y Repetto, J. Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition. Journal of Dairy Science. [en línea] 2023, 106(9), 6060-6079https://hdl.handle.net/20.500.12008/48185https://doi.org/10.3168/jds.2022-22743reponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaenengJournal of Dairy Science, 2023, 106(9), 6060-6079Las obras depositadas en el Repositorio se rigen por la Ordenanza de los Derechos de la Propiedad Intelectual de la Universidad de la República.(Res. Nº 91 de C.D.C. de 8/III/1994 – D.O. 7/IV/1994) y por la Ordenanza del Repositorio Abierto de la Universidad de la República (Res. Nº 16 de C.D.C. de 07/10/2014)info:eu-repo/semantics/openAccessLicencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)oai:colibri.udelar.edu.uy:20.500.12008/481852026-04-14T10:35:04Z |
| spellingShingle | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition Santana Fernández, Álvaro VACAS LECHERAS PASTOREO ALIMENTACION DE LOS ANIMALES |
| status_str | publishedVersion |
| title | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| title_full | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| title_fullStr | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| title_full_unstemmed | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| title_short | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| title_sort | Including 8 hours of access to alfalfa in 1 or 2 grazing sessions in dairy cows fed a partial mixed ration: Effects on intake, behavior, digestion, and milk production and composition |
| topic | VACAS LECHERAS PASTOREO ALIMENTACION DE LOS ANIMALES |
| url | https://hdl.handle.net/20.500.12008/48185 https://doi.org/10.3168/jds.2022-22743 |