|
|
| Acceso al texto completo restringido a Biblioteca INIA Treinta y Tres. Por información adicional contacte bibliott@inia.org.uy. |
Registro completo
|
Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha : |
27/11/2020 |
Actualizado : |
22/02/2021 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
HERD, R.M.; ARTHUR, P.F.; HEGARTY, R.S.; BIRD-GARDINER, T.; DONOGHUE, K.A.; VELAZCO, J.I. |
Afiliación : |
NSW Department of Primary Industries, Livestock Industry Centre. Environmental and Rural Science, University of New England, Australia.; NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute; Environmental and Rural Science, University of New England.; NSW Department of Primary Industries, Agricultural Research Centre. Australia; NSW Department of Primary Industries, Agricultural Research Centre. Australia; JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Predicting metabolisable energy intake by free-ranging cattle using multiple short-term breath samples and applied to a pasture case-study. (Article in Press) |
Fecha de publicación : |
2020 |
Fuente / Imprenta : |
Animal Production Science, 4 Nov. 2020, 61(4), p. 381-389 Doi: https://doi.org/10.1071/AN20162 |
DOI : |
10.1071/AN20162 |
Idioma : |
Inglés |
Notas : |
Article history: Received 3 April 2020, accepted 11 October 2020, published online 4 November 2020. |
Contenido : |
Context. Research into improving feed efficiency by ruminant animals grazing pastures has historically been restrained by an inability to measure feed intake by large numbers of individual animals. Recent advances in portable breath measurement technology could be useful for this purpose but methodologies need to be developed.
Aims. To evaluate predictive models for metabolisable energy intake (MEI) by free-ranging cattle using multiple short-term breath samples and then apply these to predict MEI by free-ranging cattle in a historic grazing experiment with cattle genetically divergent for residual feed intake (feed efficiency).
Methods. Predictive models for MEI were developed using bodyweight (BW) data, and carbon dioxide production rate (CPR) and methane production rate (MPR) from multiple short-term breath measurements, from an experiment with long-fed Angus steers on a grain-based diet, and an experiment with short-fed Angus heifers on a roughage diet.
Heat production was calculated using CPR and MPR. Energy retained (ER) in body tissue gain by steers was calculated from BW, ADG, initial and final subcutaneous fat depths, and for both groups using feeding-standards equations.
Key results. Metabolic mid-test BW (MBW) explained 49 and 47% of the variation in MEI in the steer and heifer experiment, respectively, and for the steers adding ADG and then subcutaneous fat gain resulted in the models accounting for 60 and then 65% of the variation in MEI. In the steer experiment, MBW with CPR explained 57% of the variation in MEI, and including MPR did not account for any additional variation. In the heifer experiment, MBW with CPR explained 50%, and with MPR accounted for 52% of the variation in MEI. Heat production plus ER explained 60, 35 and 85% of the variation in MEI in the steer and the heifer experiments, and in the pooled data from both experiments, respectively.
Conclusions. Multiple short-term breath measurements, together simple BW data, can be used to predict MEI by free-ranging cattle in studies in which animals do not have feed-intake or ADG recorded.
Implications. This methodology can be used for research into improving feed efficiency by farm animals grazing pastures. MenosContext. Research into improving feed efficiency by ruminant animals grazing pastures has historically been restrained by an inability to measure feed intake by large numbers of individual animals. Recent advances in portable breath measurement technology could be useful for this purpose but methodologies need to be developed.
Aims. To evaluate predictive models for metabolisable energy intake (MEI) by free-ranging cattle using multiple short-term breath samples and then apply these to predict MEI by free-ranging cattle in a historic grazing experiment with cattle genetically divergent for residual feed intake (feed efficiency).
Methods. Predictive models for MEI were developed using bodyweight (BW) data, and carbon dioxide production rate (CPR) and methane production rate (MPR) from multiple short-term breath measurements, from an experiment with long-fed Angus steers on a grain-based diet, and an experiment with short-fed Angus heifers on a roughage diet.
Heat production was calculated using CPR and MPR. Energy retained (ER) in body tissue gain by steers was calculated from BW, ADG, initial and final subcutaneous fat depths, and for both groups using feeding-standards equations.
Key results. Metabolic mid-test BW (MBW) explained 49 and 47% of the variation in MEI in the steer and heifer experiment, respectively, and for the steers adding ADG and then subcutaneous fat gain resulted in the models accounting for 60 and then 65% of the variation in MEI. In the steer experiment... Presentar Todo |
Palabras claves : |
AVERAGE DAILY GAIN; CARBON DIOXIDE; FEED EFFICIENCY; FEED INTAKE; GRAZING; METABOLISABLE ENERGY INTAKE; METHANE; METHANE PRODUCTION RATE; OXYGEN; PASTURE. |
Asunto categoría : |
L02 Alimentación animal |
Marc : |
LEADER 03329naa a2200325 a 4500 001 1061522 005 2021-02-22 008 2020 bl uuuu u00u1 u #d 024 7 $a10.1071/AN20162$2DOI 100 1 $aHERD, R.M. 245 $aPredicting metabolisable energy intake by free-ranging cattle using multiple short-term breath samples and applied to a pasture case-study. (Article in Press)$h[electronic resource] 260 $c2020 500 $aArticle history: Received 3 April 2020, accepted 11 October 2020, published online 4 November 2020. 520 $aContext. Research into improving feed efficiency by ruminant animals grazing pastures has historically been restrained by an inability to measure feed intake by large numbers of individual animals. Recent advances in portable breath measurement technology could be useful for this purpose but methodologies need to be developed. Aims. To evaluate predictive models for metabolisable energy intake (MEI) by free-ranging cattle using multiple short-term breath samples and then apply these to predict MEI by free-ranging cattle in a historic grazing experiment with cattle genetically divergent for residual feed intake (feed efficiency). Methods. Predictive models for MEI were developed using bodyweight (BW) data, and carbon dioxide production rate (CPR) and methane production rate (MPR) from multiple short-term breath measurements, from an experiment with long-fed Angus steers on a grain-based diet, and an experiment with short-fed Angus heifers on a roughage diet. Heat production was calculated using CPR and MPR. Energy retained (ER) in body tissue gain by steers was calculated from BW, ADG, initial and final subcutaneous fat depths, and for both groups using feeding-standards equations. Key results. Metabolic mid-test BW (MBW) explained 49 and 47% of the variation in MEI in the steer and heifer experiment, respectively, and for the steers adding ADG and then subcutaneous fat gain resulted in the models accounting for 60 and then 65% of the variation in MEI. In the steer experiment, MBW with CPR explained 57% of the variation in MEI, and including MPR did not account for any additional variation. In the heifer experiment, MBW with CPR explained 50%, and with MPR accounted for 52% of the variation in MEI. Heat production plus ER explained 60, 35 and 85% of the variation in MEI in the steer and the heifer experiments, and in the pooled data from both experiments, respectively. Conclusions. Multiple short-term breath measurements, together simple BW data, can be used to predict MEI by free-ranging cattle in studies in which animals do not have feed-intake or ADG recorded. Implications. This methodology can be used for research into improving feed efficiency by farm animals grazing pastures. 653 $aAVERAGE DAILY GAIN 653 $aCARBON DIOXIDE 653 $aFEED EFFICIENCY 653 $aFEED INTAKE 653 $aGRAZING 653 $aMETABOLISABLE ENERGY INTAKE 653 $aMETHANE 653 $aMETHANE PRODUCTION RATE 653 $aOXYGEN 653 $aPASTURE 700 1 $aARTHUR, P.F. 700 1 $aHEGARTY, R.S. 700 1 $aBIRD-GARDINER, T. 700 1 $aDONOGHUE, K.A. 700 1 $aVELAZCO, J.I. 773 $tAnimal Production Science, 4 Nov. 2020, 61(4), p. 381-389 Doi: https://doi.org/10.1071/AN20162
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Treinta y Tres (TT) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
Registro completo
|
Biblioteca (s) : |
INIA Tacuarembó. |
Fecha actual : |
21/02/2014 |
Actualizado : |
12/02/2019 |
Tipo de producción científica : |
Documentos |
Autor : |
BEMHAJA, M.; RISSO, D.; ZAMIT, W. |
Afiliación : |
MARIA DE LURDES BEMHAJA SARAIVA FERREIRA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DIEGO FERNANDO RISSO RIET, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; WILFREDO SHAMIL ZAMIT DUARTE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Caracterización de mejoramiento de campo bajo pastoreo. |
Fecha de publicación : |
1995 |
Fuente / Imprenta : |
In: INIA TACUAREMBÓ. JORNADA UNIDAD EXPERIMENTAL GLENCOE, 27 SETIEMBRE 1995, PAYSANDÚ, URUGUAY. Recría y engorde en campo natural y mejoramientos en suelos sobre basalto. Tacuarembó (Uruguay): INIA, 1995. |
Páginas : |
p. 24-29 |
Serie : |
(INIA Serie Actividades de Difusión ; 71) |
Idioma : |
Español |
Contenido : |
Objitivos: Evaluar a largo plazo, la producción de forraje, calidad y evolución de las especies sembradas y nativas en campo natural con siembra de leguminosas bajo tres cargas. Cuantificar el efecto del pastoreo caracterizando el comportamiento animal y productividad por há. Este experimento proporcionará información del potencial productivo y persistencia de estos mejoramientos en condiciones de engorde de novillos jóvenes, lográndose un mejor conocimiento del manejo de estas pasturas para su integración en distintos esquemas tecnificados de producción. |
Palabras claves : |
GRASSLAND; MEJORAMIENTO CAMPO NATURAL; PASTURE. |
Thesagro : |
MEJORA DE PASTIZALES; PASTOREO; SUELO BASALTICO; URUGUAY. |
Asunto categoría : |
L01 Ganadería |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/9492/1/SAD71p24-29.pdf
|
Marc : |
LEADER 01403naa a2200253 a 4500 001 1022044 005 2019-02-12 008 1995 bl uuuu u00u1 u #d 100 1 $aBEMHAJA, M. 245 $aCaracterización de mejoramiento de campo bajo pastoreo. 260 $c1995 300 $ap. 24-29 490 $a(INIA Serie Actividades de Difusión ; 71) 520 $aObjitivos: Evaluar a largo plazo, la producción de forraje, calidad y evolución de las especies sembradas y nativas en campo natural con siembra de leguminosas bajo tres cargas. Cuantificar el efecto del pastoreo caracterizando el comportamiento animal y productividad por há. Este experimento proporcionará información del potencial productivo y persistencia de estos mejoramientos en condiciones de engorde de novillos jóvenes, lográndose un mejor conocimiento del manejo de estas pasturas para su integración en distintos esquemas tecnificados de producción. 650 $aMEJORA DE PASTIZALES 650 $aPASTOREO 650 $aSUELO BASALTICO 650 $aURUGUAY 653 $aGRASSLAND 653 $aMEJORAMIENTO CAMPO NATURAL 653 $aPASTURE 700 1 $aRISSO, D. 700 1 $aZAMIT, W. 773 $tIn: INIA TACUAREMBÓ. JORNADA UNIDAD EXPERIMENTAL GLENCOE, 27 SETIEMBRE 1995, PAYSANDÚ, URUGUAY. Recría y engorde en campo natural y mejoramientos en suelos sobre basalto. Tacuarembó (Uruguay): INIA, 1995.
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Tacuarembó (TBO) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
Expresión de búsqueda válido. Check! |
|
|