|
|
Registro completo
|
Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
21/02/2014 |
Actualizado : |
22/02/2014 |
Título : |
Con nuestras propias manos : investigación para el desarrollo del Tercer Mundo : la contribución de Canada mediante el Centro Internacional de Investigaciones para el Desarrollo 1970-1985 |
Fecha de publicación : |
1987 |
Fuente / Imprenta : |
Bogotá (Colombia): CIID, 1987. |
Páginas : |
228p. |
ISBN : |
ISBN 0-88936-477-X |
Idioma : |
Español |
Thesagro : |
ACUICULTURA; ALMACENAMIENTO; AYUDA AL DESARROLLO; CALIDAD DE VIDA; CANADA; CIENTIFICOS; DATOS DE PRODUCCION; DESARROLLO ECONOMICO Y SOCIAL; DOCENTES; EDUCACION; ESTUDIOS DE CASOS PRACTICOS; INNOVACION; INSTITUCIONES DE INVESTIGACION; INVESTIGACION; PAISES EN DESARROLLO; PLANIFICACION; PROYECTOS DE INVESTIGACION; SISTEMAS DE CULTIVO; SISTEMAS DE INFORMACION; TECNOLOGIA POSTCOSECHA; TRANSFERENCIA DE TECNOLOGIA. |
Asunto categoría : |
-- |
Marc : |
LEADER 01124nam a2200349 a 4500 001 1000353 005 2014-02-22 008 1987 bl uuuu u00u1 u #d 245 $aCon nuestras propias manos$binvestigación para el desarrollo del Tercer Mundo : la contribución de Canada mediante el Centro Internacional de Investigaciones para el Desarrollo 1970-1985 260 $aBogotá (Colombia): CIID$c1987 300 $a228p. 650 $aACUICULTURA 650 $aALMACENAMIENTO 650 $aAYUDA AL DESARROLLO 650 $aCALIDAD DE VIDA 650 $aCANADA 650 $aCIENTIFICOS 650 $aDATOS DE PRODUCCION 650 $aDESARROLLO ECONOMICO Y SOCIAL 650 $aDOCENTES 650 $aEDUCACION 650 $aESTUDIOS DE CASOS PRACTICOS 650 $aINNOVACION 650 $aINSTITUCIONES DE INVESTIGACION 650 $aINVESTIGACION 650 $aPAISES EN DESARROLLO 650 $aPLANIFICACION 650 $aPROYECTOS DE INVESTIGACION 650 $aSISTEMAS DE CULTIVO 650 $aSISTEMAS DE INFORMACION 650 $aTECNOLOGIA POSTCOSECHA 650 $aTRANSFERENCIA DE TECNOLOGIA
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Las Brujas (LB) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
| 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 actual : |
25/07/2016 |
Actualizado : |
09/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
A - -- |
Autor : |
VELAZCO, J.I.; HERD, R.M.; COTTLE, D.J.; HEGARTY, R.S. |
Afiliación : |
JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. University of New England, Australia.; Department of Primary Industries, Australia.; University of New England, Australia; University of New England, Australia. |
Título : |
Daily methane emissions and emission intensity of grazing beef cattle genetically divergent for residual feed intake. |
Fecha de publicación : |
2017 |
Fuente / Imprenta : |
Animal Production Science, 2017, v. 57, p. 627-635. |
DOI : |
10.1071/AN15111 |
Idioma : |
Inglés |
Notas : |
Article history: Submitted: 27 February 2015 Accepted: 15 January 2016 Published (Preview): 27 May 2016. |
Contenido : |
Abstract:
As daily methane production (DMP; g CH4/day) is strongly correlated with dry matter intake (DMI), the breeding of cattle that require less feed to achieve a desired rate of average daily gain (ADG) by selection for a low residual feed intake (RFI) can be expected to reduce DMP and also emission intensity (EI; g CH4/kg ADG). An xperiment was conducted to compare DMP and EI of Angus cattle genetically divergent for RFI and 400-day weight (400dWT). In a 6-week grazing study, 64 yearling-age cattle (30 steers, 34 heifers) were grazed on temperate pastures, with heifers and steers grazing separate paddocks. Liveweight (LW) was monitored weekly and DMP of individual cattle was measured by a GreenFeed emission monitoring unit in each paddock. Thirty-nine of the possible 64 animals had emission data recorded for 15 or more days, and only data for these animals were analysed. For these cattle, regression against their mid-parent estimated breeding value (EBV) for post-weaning RFI (RFI-EBV) showed that a lower RFI-EBV was associated with higher LW at the start of experiment. Predicted dry matter intake (pDMI), predicted DMP (pDMP) and measured DMP (mDMP) were all egatively correlated with RFI-EBV (P < 0.05), whereas ADG, EI, predicted CH4 yield (pMY; g CH4/kg DMI) were not correlated with RFI-EBV (P > 0.1). Daily CH4 production was positively correlated with animal LW and ADG (P < 0.05). The associations between ADG and its dependent traits EI and pMY and predicted feed conversion ratio (kg pDMI/kg ADG) were strongly negative (r = ?0.82, ?0.57 and ?0.85, P < 0.001) implying that faster daily growth by cattle was accompanied by lower EI, MY and feed conversion ratio. These results show that cattle genetically divergent for RFI do not necessarily differ in ADG, EI or pMY on pasture and that, if heavier, cattle with lower RFI-EBV can actually have higher DMP while grazing moderate quality pastures. MenosAbstract:
As daily methane production (DMP; g CH4/day) is strongly correlated with dry matter intake (DMI), the breeding of cattle that require less feed to achieve a desired rate of average daily gain (ADG) by selection for a low residual feed intake (RFI) can be expected to reduce DMP and also emission intensity (EI; g CH4/kg ADG). An xperiment was conducted to compare DMP and EI of Angus cattle genetically divergent for RFI and 400-day weight (400dWT). In a 6-week grazing study, 64 yearling-age cattle (30 steers, 34 heifers) were grazed on temperate pastures, with heifers and steers grazing separate paddocks. Liveweight (LW) was monitored weekly and DMP of individual cattle was measured by a GreenFeed emission monitoring unit in each paddock. Thirty-nine of the possible 64 animals had emission data recorded for 15 or more days, and only data for these animals were analysed. For these cattle, regression against their mid-parent estimated breeding value (EBV) for post-weaning RFI (RFI-EBV) showed that a lower RFI-EBV was associated with higher LW at the start of experiment. Predicted dry matter intake (pDMI), predicted DMP (pDMP) and measured DMP (mDMP) were all egatively correlated with RFI-EBV (P < 0.05), whereas ADG, EI, predicted CH4 yield (pMY; g CH4/kg DMI) were not correlated with RFI-EBV (P > 0.1). Daily CH4 production was positively correlated with animal LW and ADG (P < 0.05). The associations between ADG and its dependent traits EI and pMY and predicted feed conv... Presentar Todo |
Palabras claves : |
CH4; FEED CONSERVATION EFFICIENCY; GRAZING CATTLE; GREENHOUSE GASES; MEASUREMENT; RFI. |
Thesagro : |
GASES DE EFECTO INVERNADERO; MEDIDAS; METANO; PASTOREO DE GANADO. |
Asunto categoría : |
T01 Polución |
Marc : |
LEADER 02893naa a2200301 a 4500 001 1055090 005 2019-10-09 008 2017 bl uuuu u00u1 u #d 024 7 $a10.1071/AN15111$2DOI 100 1 $aVELAZCO, J.I. 245 $aDaily methane emissions and emission intensity of grazing beef cattle genetically divergent for residual feed intake.$h[electronic resource] 260 $c2017 500 $aArticle history: Submitted: 27 February 2015 Accepted: 15 January 2016 Published (Preview): 27 May 2016. 520 $aAbstract: As daily methane production (DMP; g CH4/day) is strongly correlated with dry matter intake (DMI), the breeding of cattle that require less feed to achieve a desired rate of average daily gain (ADG) by selection for a low residual feed intake (RFI) can be expected to reduce DMP and also emission intensity (EI; g CH4/kg ADG). An xperiment was conducted to compare DMP and EI of Angus cattle genetically divergent for RFI and 400-day weight (400dWT). In a 6-week grazing study, 64 yearling-age cattle (30 steers, 34 heifers) were grazed on temperate pastures, with heifers and steers grazing separate paddocks. Liveweight (LW) was monitored weekly and DMP of individual cattle was measured by a GreenFeed emission monitoring unit in each paddock. Thirty-nine of the possible 64 animals had emission data recorded for 15 or more days, and only data for these animals were analysed. For these cattle, regression against their mid-parent estimated breeding value (EBV) for post-weaning RFI (RFI-EBV) showed that a lower RFI-EBV was associated with higher LW at the start of experiment. Predicted dry matter intake (pDMI), predicted DMP (pDMP) and measured DMP (mDMP) were all egatively correlated with RFI-EBV (P < 0.05), whereas ADG, EI, predicted CH4 yield (pMY; g CH4/kg DMI) were not correlated with RFI-EBV (P > 0.1). Daily CH4 production was positively correlated with animal LW and ADG (P < 0.05). The associations between ADG and its dependent traits EI and pMY and predicted feed conversion ratio (kg pDMI/kg ADG) were strongly negative (r = ?0.82, ?0.57 and ?0.85, P < 0.001) implying that faster daily growth by cattle was accompanied by lower EI, MY and feed conversion ratio. These results show that cattle genetically divergent for RFI do not necessarily differ in ADG, EI or pMY on pasture and that, if heavier, cattle with lower RFI-EBV can actually have higher DMP while grazing moderate quality pastures. 650 $aGASES DE EFECTO INVERNADERO 650 $aMEDIDAS 650 $aMETANO 650 $aPASTOREO DE GANADO 653 $aCH4 653 $aFEED CONSERVATION EFFICIENCY 653 $aGRAZING CATTLE 653 $aGREENHOUSE GASES 653 $aMEASUREMENT 653 $aRFI 700 1 $aHERD, R.M. 700 1 $aCOTTLE, D.J. 700 1 $aHEGARTY, R.S. 773 $tAnimal Production Science, 2017$gv. 57, p. 627-635.
Descargar
Esconder MarcPresentar Marc Completo |
Registro original : |
INIA Treinta y Tres (TT) |
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
Expresión de búsqueda válido. Check! |
|
|