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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó; INIA Treinta y Tres. |
Fecha : |
21/02/2014 |
Actualizado : |
30/08/2016 |
Tipo de producción científica : |
Documentos |
Autor : |
ACEVEDO, A.; BONILLA, O.; MAS, C.; VIDIELLA, J.C. |
Afiliación : |
ANTONIO ACEVEDO; OSCAR BONILLA; CARLOS JAIME MAS TEJERO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JUAN C. VIDIELLA. |
Título : |
Proyecto regional en le zona del Este. |
Fecha de publicación : |
1973 |
Fuente / Imprenta : |
ln: "Uruguay. Ministerio de Ganadería y Agricultura (MGA) ; Centro de Investigaciones Agrícolas ""Alberto Boerger"" (CIAAB)". Pasturas I. Montevideo (Uruguay): CIAAB, 1973. |
Páginas : |
p. 24-93 |
Idioma : |
Español |
Palabras claves : |
MEJORAMIENTO DE PASTURAS NATURALES; ZONA BAJA; ZONA DEL ESTE; ZONA ONDULADA. |
Thesagro : |
APLICACION DE ABONOS; ESPECIES; FERTILIZACION; GRAMÍNEAS FORRAJERAS; MEJORAMIENTO DE PASTURAS; MEZCLAS FORRAJERAS; PASTIZALES; PASTURAS; PASTURAS NATURALES; PRODUCCION DE FORRAJE; URUGUAY. |
Asunto categoría : |
-- F62 Fisiología de la planta - Crecimiento y desarrollo |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5953/1/Pasturas-I.-Octubre-1973.pdf
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Marc : |
LEADER 01017naa a2200337 a 4500 001 1022273 005 2016-08-30 008 1973 bl uuuu u00u1 u #d 100 1 $aACEVEDO, A. 245 $aProyecto regional en le zona del Este. 260 $c1973 300 $ap. 24-93 650 $aAPLICACION DE ABONOS 650 $aESPECIES 650 $aFERTILIZACION 650 $aGRAMÍNEAS FORRAJERAS 650 $aMEJORAMIENTO DE PASTURAS 650 $aMEZCLAS FORRAJERAS 650 $aPASTIZALES 650 $aPASTURAS 650 $aPASTURAS NATURALES 650 $aPRODUCCION DE FORRAJE 650 $aURUGUAY 653 $aMEJORAMIENTO DE PASTURAS NATURALES 653 $aZONA BAJA 653 $aZONA DEL ESTE 653 $aZONA ONDULADA 700 1 $aBONILLA, O. 700 1 $aMAS, C. 700 1 $aVIDIELLA, J.C. 773 $tln: "Uruguay. Ministerio de Ganadería y Agricultura (MGA) ; Centro de Investigaciones Agrícolas ""Alberto Boerger"" (CIAAB)". Pasturas I. Montevideo (Uruguay): CIAAB, 1973.
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Registro original : |
INIA Tacuarembó (TBO) |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha actual : |
30/07/2020 |
Actualizado : |
22/04/2021 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
-- - -- |
Autor : |
IEWDIUKOW, M.; LEMA, O.M.; VELAZCO, J.I.; QUINTANS, G. |
Afiliación : |
MARÍA IEWDIUKOW, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; OSCAR MARIO LEMA QUEIJO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Is it possible to accurately estimate lactation curve parameters in extensive beef production systems? |
Fecha de publicación : |
2020 |
Fuente / Imprenta : |
Applied Animal Science, August 2020, v. 36 (4), p. 509-514. Open Access. Doi: https://doi.org/10.15232/aas.2019-01965 |
DOI : |
10.15232/aas.2019-01965 |
Idioma : |
Inglés |
Notas : |
Article history: Received 2 December 2019, Accepted 13 April 2020, Available online 25 July 2020. |
Contenido : |
Objective
The objective was to characterize the lactation curve applying 3 different models using multiparous grazing beef cows.
Materials and Methods
Milk production data from 99 British crossbred multiparous cows grazing native pastures were analyzed. Lactation was assessed 15 d postpartum and then monthly until weaning (180 d postpartum) using a milking machine after an oxytocin injection. Total milk production and lactation curve were characterized using Wood (WD) and Wilmink (WIL) models, and both were compared with spline functions. Comparison was made applying adjusted coefficient of determination (R2adj) and MSE.
Results and Discussion
Cubic splines with 5 equally spaced knots (CS5) presented the best adjustment (lowest Akaike information criterion and Bayesian information criterion). The R2adj values were 0.55, 0.54, and 0.53 (the greater the better) and MSE values were 2.54, 2.59, and 2.47 (the lower the better) for WD, WIL, and CS5, respectively. Estimated milk production for the lactation period was 1,277, 1,255, and 1,195 kg for WD, WIL, and CS5, respectively. Milk peak was predicted to happen at 32, 25, and 36 d postpartum, with a production of 8.74, 8.21, and 8.40 kg for WD, WIL, and CS5, respectively. No differences were evident in the lactation curves (95% CI).
Implications and Applications
The proposed method and frequency used to assess grazing beef cattle milk production accurately estimate the lactation curve. The Wood model, used worldwide, was a precise estimator of the lactation curve, which in our case was verified applying splines. These results provide key information to calculate grazing beef cow requirements. MenosObjective
The objective was to characterize the lactation curve applying 3 different models using multiparous grazing beef cows.
Materials and Methods
Milk production data from 99 British crossbred multiparous cows grazing native pastures were analyzed. Lactation was assessed 15 d postpartum and then monthly until weaning (180 d postpartum) using a milking machine after an oxytocin injection. Total milk production and lactation curve were characterized using Wood (WD) and Wilmink (WIL) models, and both were compared with spline functions. Comparison was made applying adjusted coefficient of determination (R2adj) and MSE.
Results and Discussion
Cubic splines with 5 equally spaced knots (CS5) presented the best adjustment (lowest Akaike information criterion and Bayesian information criterion). The R2adj values were 0.55, 0.54, and 0.53 (the greater the better) and MSE values were 2.54, 2.59, and 2.47 (the lower the better) for WD, WIL, and CS5, respectively. Estimated milk production for the lactation period was 1,277, 1,255, and 1,195 kg for WD, WIL, and CS5, respectively. Milk peak was predicted to happen at 32, 25, and 36 d postpartum, with a production of 8.74, 8.21, and 8.40 kg for WD, WIL, and CS5, respectively. No differences were evident in the lactation curves (95% CI).
Implications and Applications
The proposed method and frequency used to assess grazing beef cattle milk production accurately estimate the lactation curve. The Wood model, used worldwide, was a precis... Presentar Todo |
Palabras claves : |
BEEF CATTLE; ENERGY REQUIREMENTS; MILK PRODUCTION; NATIVE PASTURES; REQUERIMIENTOS ENERGÉTICOS; WOOD MODEL. |
Thesagro : |
PASTURAS NATURALES; PRODUCCION ANIMAL; PRODUCCIÓN DE LECHE. |
Asunto categoría : |
L01 Ganadería |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/14574/1/Iewdiukow-2020.pdf
https://www.sciencedirect.com/science/article/pii/S2590286520300896?via%3Dihub
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Marc : |
LEADER 02681naa a2200289 a 4500 001 1061253 005 2021-04-22 008 2020 bl uuuu u00u1 u #d 024 7 $a10.15232/aas.2019-01965$2DOI 100 1 $aIEWDIUKOW, M. 245 $aIs it possible to accurately estimate lactation curve parameters in extensive beef production systems?$h[electronic resource] 260 $c2020 500 $aArticle history: Received 2 December 2019, Accepted 13 April 2020, Available online 25 July 2020. 520 $aObjective The objective was to characterize the lactation curve applying 3 different models using multiparous grazing beef cows. Materials and Methods Milk production data from 99 British crossbred multiparous cows grazing native pastures were analyzed. Lactation was assessed 15 d postpartum and then monthly until weaning (180 d postpartum) using a milking machine after an oxytocin injection. Total milk production and lactation curve were characterized using Wood (WD) and Wilmink (WIL) models, and both were compared with spline functions. Comparison was made applying adjusted coefficient of determination (R2adj) and MSE. Results and Discussion Cubic splines with 5 equally spaced knots (CS5) presented the best adjustment (lowest Akaike information criterion and Bayesian information criterion). The R2adj values were 0.55, 0.54, and 0.53 (the greater the better) and MSE values were 2.54, 2.59, and 2.47 (the lower the better) for WD, WIL, and CS5, respectively. Estimated milk production for the lactation period was 1,277, 1,255, and 1,195 kg for WD, WIL, and CS5, respectively. Milk peak was predicted to happen at 32, 25, and 36 d postpartum, with a production of 8.74, 8.21, and 8.40 kg for WD, WIL, and CS5, respectively. No differences were evident in the lactation curves (95% CI). Implications and Applications The proposed method and frequency used to assess grazing beef cattle milk production accurately estimate the lactation curve. The Wood model, used worldwide, was a precise estimator of the lactation curve, which in our case was verified applying splines. These results provide key information to calculate grazing beef cow requirements. 650 $aPASTURAS NATURALES 650 $aPRODUCCION ANIMAL 650 $aPRODUCCIÓN DE LECHE 653 $aBEEF CATTLE 653 $aENERGY REQUIREMENTS 653 $aMILK PRODUCTION 653 $aNATIVE PASTURES 653 $aREQUERIMIENTOS ENERGÉTICOS 653 $aWOOD MODEL 700 1 $aLEMA, O.M. 700 1 $aVELAZCO, J.I. 700 1 $aQUINTANS, G. 773 $tApplied Animal Science, August 2020$gv. 36 (4), p. 509-514. Open Access. Doi: https://doi.org/10.15232/aas.2019-01965
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