Effect of breed on the voluntary intake of grazing ewes during lactation.
Six lactating Suffolk ewes and eight lactating Rambouillet ewes, with twins, were used to determine breed differences in the voluntary intake of a Lolium multiflorum pasture, under continuous grazing. Fecal production was estimated using 1 g of chromium sesquioxide per sheep as an external marker, a...
| Publicado en: | Veterinaria México Vol. 36; no. 1; pp. 41 - 53 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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Facultad de Medicina Veterinaria y Zootecnia UNAM
ene-mar2005
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=lth&AN=16305497&site=ehost-live header: @attributes: shortDbName: lth uiTerm: 16305497 longDbName: MedicLatina uiTag: AN controlInfo: bkinfo: jinfo: jid: 03015092 7LD jtl: Veterinaria México issn: 03015092 maglogo: N pubinfo: dt: ene-mar2005 vid: 36 iid: 1 pid: 20869 pub: Facultad de Medicina Veterinaria y Zootecnia UNAM artinfo: ui: 16305497 ppf: 41 ppct: 12 formats: fmt: @attributes: type: P size: 262KB tig: atl: Effect of breed on the voluntary intake of grazing ewes during lactation. aug: au: Nieto, Yolanda Castañeda Buntinx Dios, Silvia Elena Martínez, René Rosiles Angulo Mejorada, Rosa Bertha affil: Departamento de Nutrición Animal y Bioquímica, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, 04510, México, D. F. Centro de Enseñanza, Investigación y Extensión en Producción Ovina, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, 04510, México, D.F. su: Ewes Lactation Reproduction Animal nutrition Ryegrasses Grazing Pastures sug: subj: Ewes Lactation Reproduction Animal nutrition Ryegrasses Grazing Pastures keyword: GRAZING LACTATION RAMBOUILLET SHEEP SUFFOLK VOLUNTARY INTAKE CONSUMO VOLUNTARIO LACTANCIA OVEJAS PASTOREO RAMBOUILLET SUFFOLK ab: Six lactating Suffolk ewes and eight lactating Rambouillet ewes, with twins, were used to determine breed differences in the voluntary intake of a Lolium multiflorum pasture, under continuous grazing. Fecal production was estimated using 1 g of chromium sesquioxide per sheep as an external marker, administered in two gelatin capsules per animal, before and after the grazing period (7:00 and 17:30 h), from the fourth to the 64th day after parturition. Fecal samples were collected directly from the rectum of each animal during three consecutive days, on days 18-20, 33-35, 48-50 and 63-65 postpartum. The in vitro dry matter (DM) digestibility of the forage was estimated for the same days taking three daily hand-plucked samples of forage. With this information, voluntary intake per animal and per metabolic bodyweight was estimated. Data were analyzed using a completely randomized design with repeated measures. Voluntary intake expressed in kg of DM per animal (Suffolk = 3.28 vs. Rambouillet = 2.44) and per metabolic bodyweight (Suffolk = 0.1045 vs. Rambouillet = 0.1422 kgBW) was lower for the Suffolk than for the Rambouillet ewes, which was probably due to a better performance of the Rambouillet breed under grazing conditions. Se utilizaron seis ovejas Suffolk y ocho Rambouillet de parto gemelar para determinar diferencias por raza en el consumo voluntario, en una lactancia en pastoreo continuo en una pradera de Lolium multiflorum. La producción fecal se estimó usando 1 g de sesquióxido de cromo por oveja como marcador externo, administrado en dos cápsulas de gelatina por animal, una antes y la otra al finalizar el periodo de pastoreo (7:00 y 17:30 h), a partir del cuarto día posparto hasta los 64 días posteriores a éste. Las muestras de heces se recolectaron de cada animal vía rectal por tres días consecutivos, los días 18 a 20, 33 a 35, 48 a 50 y 63 a 65 posparto. La digestibilidad in vitro de la MS del forraje se estimó durante los mismos días tomando tres muestras manuales diarias de forraje. Con toda esa información se estimó el consumo voluntario por animal por días y por peso metabólico. Los datos fueron analizados mediante un diseño completamente al azar y mediciones repetidas. El consumo voluntario, expresado en kg de MS por animal (Suffolk = 3.28 vs Rambouillet = 2.44) y por peso metabólico (Suffolk = 0.1045 vs Rambouillet = 0.1422 kg PV) mostraron diferencias por raza, siendo menor para las ovejas Suffolk que para las Rambouillet, lo que probablemente se deba a un mejor desempeño de la raza Rambouillet bajo condiciones de pastoreo. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y custom: Copyright of Veterinaria México is the property of Facultad de Medicina Veterinaria y Zootecnia UNAM and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. item: Veterinaria México holder: Facultad de Medicina Veterinaria y Zootecnia UNAM dt: @attributes: year: 2005 holdings: @attributes: islocal: N |
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