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| 78. |  | Azzarini, M.; Mazzitelli, F. La investigación en producción ovina en el Uruguay ln: Reunión sobre Investigación en Producción Ovina de la Zona Sur, 1979 may 21-25 : Montevideo Caballero D., H. ; Cardellino, R.C. Producción e investigación ovina en Argentina, Brasil, Chile, Paraguay y Uruguay. Montevideo (Uruguay): IICA ; SUL ; OEA, 1979. p135-143 Informes de Conferencias, Cursos y Reuniones (IICA)| Biblioteca(s): INIA La Estanzuela. |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
18/12/2020 |
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Actualizado : |
02/09/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
BANCHERO, G.; STEFANOVA, K.; LINDSAY, D.R.; QUINTANS, G.; BALDI, F.; MILTON, J.T.B.; MARTIN, G.B. |
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Afiliación : |
GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; UWA School of Agriculture and Environment, The University of Western Australia, Crawley 6009, Australia.; UWA Institute of Agriculture, The University of Western Australia.; K. STEFANOVA, UWA School of Agriculture and Environment, The University of Western Australia, Crawley 6009, Australia.; D.R. LINDSAY, UWA School of Agriculture and Environment, The University of Western Australia, Crawley 6009, Australia.; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO BALDI, Departament of Animal Science, College of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal/SP, CEP 14870-720, Brazil.; UWA School of Agriculture and Environment, The University of Western Australia, Crawley 6009, Australia; UWA School of Agriculture and Environment, The University of Western Australia, Crawley 6009, Australia. |
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Título : |
Ovulation and ovulation rate in ewes under grazing conditions: factors affecting the response to short-term supplementation. |
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Fecha de publicación : |
2021 |
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Fuente / Imprenta : |
Animal, Volume 15, Issue 2, February 2021, Article number 100100. OPEN ACCESS. Doi: https://doi.org/10.1016/j.animal.2020.100100 |
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ISSN : |
1751-7311 |
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DOI : |
10.1016/j.animal.2020.100100 |
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Idioma : |
Inglés |
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Notas : |
Article history:Received 11 July 2020/Received in revised form 22 September 2020/Accepted 24 September 2020/
Available online 14 dic 2020. Corresponding author : E-mail address: gbanchero@inia.org.uy (G.E. Banchero). |
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Contenido : |
Abstract:
The relationships between ovulation rate and nutrition remain confused, probably because of uncontrolled variation in experimental conditions. To help resolve the problem, we analyzed data from 20 experiments conducted between 2002 and 2016, in Uruguay with grazing ewes. All experiments were carried out by a single laboratory under comparable conditions of experimental design and measured variables. The studies used a total of 3?720 ewes, of purebred Corriedale, Polwarth, or East Friesian x Polwarth genotypes. In all experiments, a control group grazed native pastures and extra nutrition was provided to the treatment groups using either improved pastures or supplements. Ovulation rate was measured by counting corpora lutea using laparoscopy or rectal ultrasound or by counting foetuses at ultrasound on day 45 of gestation. For statistical analysis, data were grouped according to nutritional treatment (control or supplemented) and, within these groups, type of supplement to provide energy or protein (protected or not from rumen degradation). Across all experiments, 92?99% of the ewes ovulated and the effects of diet, length of supplementation, and initial live weight and genotype are reported. Within diets, ovulation was most affected by overall energy intake during supplementation (P?MenosAbstract:
The relationships between ovulation rate and nutrition remain confused, probably because of uncontrolled variation in experimental conditions. To help resolve the problem, we analyzed data from 20 experiments conducted between 2002 and 2016, in Uruguay with grazing ewes. All experiments were carried out by a single laboratory under comparable conditions of experimental design and measured variables. The studies used a total of 3?720 ewes, of purebred Corriedale, Polwarth, or East Friesian x Polwarth genotypes. In all experiments, a control group grazed native pastures and extra nutrition was provided to the treatment groups using either improved pastures or supplements. Ovulation rate was measured by counting corpora lutea using laparoscopy or rectal ultrasound or by counting foetuses at ultrasound on day 45 of gestation. For statistical analysis, data were grouped according to nutritional treatment (control or supplemented) and, within these groups, type of supplement to provide energy or protein (protected or not from rumen degradation). Across all experiments, 92?99% of the ewes ovulated and the effects of diet, length of supplementation, and initial live weight and genotype are reported. Within diets, ovulation was most affected by overall energy intake during supplementation (P?Presentar Todo |
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Palabras claves : |
ENERGY; OVINE; PASTURES; PROTEIN; TANNINS. |
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Thesagro : |
OVINOS. |
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Asunto categoría : |
-- |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/16665/1/1-s2.0-S1751731120301026-main.pdf
https://www.sciencedirect.com/science/article/pii/S1751731120301026
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Marc : |
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245 $aOvulation and ovulation rate in ewes under grazing conditions$bfactors affecting the response to short-term supplementation.$h[electronic resource]
260 $c2021
500 $aArticle history:Received 11 July 2020/Received in revised form 22 September 2020/Accepted 24 September 2020/ Available online 14 dic 2020. Corresponding author : E-mail address: gbanchero@inia.org.uy (G.E. Banchero).
520 $aAbstract: The relationships between ovulation rate and nutrition remain confused, probably because of uncontrolled variation in experimental conditions. To help resolve the problem, we analyzed data from 20 experiments conducted between 2002 and 2016, in Uruguay with grazing ewes. All experiments were carried out by a single laboratory under comparable conditions of experimental design and measured variables. The studies used a total of 3?720 ewes, of purebred Corriedale, Polwarth, or East Friesian x Polwarth genotypes. In all experiments, a control group grazed native pastures and extra nutrition was provided to the treatment groups using either improved pastures or supplements. Ovulation rate was measured by counting corpora lutea using laparoscopy or rectal ultrasound or by counting foetuses at ultrasound on day 45 of gestation. For statistical analysis, data were grouped according to nutritional treatment (control or supplemented) and, within these groups, type of supplement to provide energy or protein (protected or not from rumen degradation). Across all experiments, 92?99% of the ewes ovulated and the effects of diet, length of supplementation, and initial live weight and genotype are reported. Within diets, ovulation was most affected by overall energy intake during supplementation (P?650 $aOVINOS
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653 $aPROTEIN
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700 1 $aSTEFANOVA, K.
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700 1 $aBALDI, F.
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773 $tAnimal, Volume 15, Issue 2, February 2021, Article number 100100. OPEN ACCESS. Doi: https://doi.org/10.1016/j.animal.2020.100100
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