| |
|
|
|
Registro completo
|
|
Biblioteca (s) : |
INIA Tacuarembó; INIA Treinta y Tres. |
|
Fecha : |
21/02/2014 |
|
Actualizado : |
07/07/2016 |
|
Autor : |
CESAR, D.; SARAVIA, A.; GAYO, J.; MONTES, E.; IRAZOQUI, D.; JUAN, M.; CORREA, O. |
|
Afiliación : |
DEBORA CESAR, IPA (Instituto Plan Agropecuario); ALEJANDRO SARAVIA, IPA (Instituto Plan Agropecuario); JOSÉ GAYO, IPA (Instituto Plan Agropecuario); ESTEBAN MONTES, IPA (Instituto Plan Agropecuario); DIEGO IRAZOQUI, Merial S.A; MARTÍN JUAN, Merial S.A; OSCAR CORREA, Universidad de la República (UdelaR)/ Facultad de Veterinaria. |
|
Título : |
Importancia de las recrías de reemplazo en los sistemas de producción vacuna. |
|
Fecha de publicación : |
2003 |
|
Fuente / Imprenta : |
ln: Seminario el campo natural y la empresa ganadera, 2003 Trabajos presentados. Montevideo (Uruguay): Instituto Plan Agropecuario, 2003. |
|
Páginas : |
p 55-62 |
|
Idioma : |
Español |
|
Notas : |
Instituto Plan Agropecuario; GTZ |
|
Contenido : |
En la mayoría de los sistemas de producción de nuestro país la recría de las terneras se realiza sobre campo natural. Quiere decir que una vez que son destetadas y hasta que llegan al peso de entore permanecen a campo natural. |
|
Thesagro : |
GANADERIA; GANADO BOVINO; VACAS DE CRIA. |
|
Asunto categoría : |
--
L01 Ganadería |
|
Marc : |
LEADER 00986naa a2200253 a 4500
001 1025693
005 2016-07-07
008 2003 bl uuuu u00u1 u #d
100 1 $aCESAR, D.
245 $aImportancia de las recrías de reemplazo en los sistemas de producción vacuna.
260 $c2003
300 $ap 55-62
500 $aInstituto Plan Agropecuario; GTZ
520 $aEn la mayoría de los sistemas de producción de nuestro país la recría de las terneras se realiza sobre campo natural. Quiere decir que una vez que son destetadas y hasta que llegan al peso de entore permanecen a campo natural.
650 $aGANADERIA
650 $aGANADO BOVINO
650 $aVACAS DE CRIA
700 1 $aSARAVIA, A.
700 1 $aGAYO, J.
700 1 $aMONTES, E.
700 1 $aIRAZOQUI, D.
700 1 $aJUAN, M.
700 1 $aCORREA, O.
773 $tln: Seminario el campo natural y la empresa ganadera, 2003 Trabajos presentados. Montevideo (Uruguay): Instituto Plan Agropecuario, 2003.
Descargar
Esconder MarcPresentar Marc Completo |
|
Registro original : |
INIA Tacuarembó (TBO) |
|
|
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 : |
24/11/2015 |
|
Actualizado : |
19/09/2018 |
|
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
|
Circulación / Nivel : |
Internacional - A |
|
Autor : |
VELAZCO, J.I.; MAYER, D.G.; ZIMMERMAN, S.; HEGARTY, S. |
|
Afiliación : |
JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
|
Título : |
Use of short-term breath measures to estimate daily methane production by cattle. |
|
Fecha de publicación : |
2015 |
|
Fuente / Imprenta : |
Animal, 2015, v. 10 (1) p. 25-33. |
|
ISBN : |
10.1017/s1751731115001603 |
|
Idioma : |
Inglés |
|
Notas : |
Article history: Received 30 September 2014; Accepted 29 June 2015. |
|
Contenido : |
Methods to measure enteric methane (CH4) emissions from individual ruminants in their production environment are required to validate emission inventories and verify mitigation claims. Estimates of daily methane production (DMP) based on consolidated short-term emission measurements are developing, but method verification is required. Two cattle experiments were undertaken to test the hypothesis that DMP estimated by averaging multiple short-term breath measures of methane emission rate did not differ from DMP measured in respiration chambers (RC). Short-term emission rates were obtained from a GreenFeed Emissions Monitoring (GEM) unit, which measured emission rate while cattle consumed a dispensed supplement. In experiment 1 (Expt. 1), four non-lactating cattle (LW = 518 kg) were adapted for 18 days then measured for six consecutive periods. Each period consisted of 2 days of ad libitum intake and GEM emission measurement followed by 1 day in the RC. A prototype GEM unit releasing water as an attractant (GEM water) was also evaluated in Expt. 1. Experiment 2 (Expt. 2) was a larger study based on similar design with 10 cattle (LW = 365 kg), adapted for 21 days and GEM measurement was extended to 3 days in each of the six periods. In Expt. 1, there was no difference in DMP estimated by the GEM unit relative to the RC (209.7 v. 215.1 g CH4/day) and no difference between these methods in methane yield (MY, 22.7 v. 23.7 g CH4/kg of dry matter intake, DMI). In Expt. 2, the correlation between GEM and RC measures of DMP and MY were assessed using 95% confidence intervals, with no difference in DMP or MY between
methods and high correlations between GEM and RC measures for DMP ( r = 0.85; 215 v. 198 g CH4/day SEM = 3.0) and for MY ( r = 0.60; 23.8 v. 22.1 g CH4/kg DMI SEM = 0.42). When data from both experiments was combined neither DMP nor MY differed between GEM- and RC-based measures ( P >0.05). GEM water-based estimates of DMP and MY were lower than RC and GEM ( P <0.05). Cattle accessed the GEM water unit with similar frequency to the GEM unit (2.8 v. 3.5 times/day, respectively) but eructation frequency was reduced from 1.31 times/min (GEM) to once every 2.6 min (GEM water). These studies confirm the hypothesis that DMP estimated by averaging multiple short-term breath measures of methane emission rate using GEM does not differ from measures of DMP obtained from RCs. Further, combining many short-term measures of methane production rate during supplement consumption provides an estimate of DMP, which can be usefully applied in estimating MY. MenosMethods to measure enteric methane (CH4) emissions from individual ruminants in their production environment are required to validate emission inventories and verify mitigation claims. Estimates of daily methane production (DMP) based on consolidated short-term emission measurements are developing, but method verification is required. Two cattle experiments were undertaken to test the hypothesis that DMP estimated by averaging multiple short-term breath measures of methane emission rate did not differ from DMP measured in respiration chambers (RC). Short-term emission rates were obtained from a GreenFeed Emissions Monitoring (GEM) unit, which measured emission rate while cattle consumed a dispensed supplement. In experiment 1 (Expt. 1), four non-lactating cattle (LW = 518 kg) were adapted for 18 days then measured for six consecutive periods. Each period consisted of 2 days of ad libitum intake and GEM emission measurement followed by 1 day in the RC. A prototype GEM unit releasing water as an attractant (GEM water) was also evaluated in Expt. 1. Experiment 2 (Expt. 2) was a larger study based on similar design with 10 cattle (LW = 365 kg), adapted for 21 days and GEM measurement was extended to 3 days in each of the six periods. In Expt. 1, there was no difference in DMP estimated by the GEM unit relative to the RC (209.7 v. 215.1 g CH4/day) and no difference between these methods in methane yield (MY, 22.7 v. 23.7 g CH4/kg of dry matter intake, DMI). In Expt. 2, the correl... Presentar Todo |
|
Palabras claves : |
CATTLE; GAS METANO; GREENHOUSE GASES; MEASUREMENT; METHANE. |
|
Thesagro : |
GANADO; GASES DE EFECTO INVERNADERO; MEDIDAS. |
|
Asunto categoría : |
T01 Polución |
|
Marc : |
LEADER 03343naa a2200265 a 4500
001 1053983
005 2018-09-19
008 2015 bl uuuu u00u1 u #d
100 1 $aVELAZCO, J.I.
245 $aUse of short-term breath measures to estimate daily methane production by cattle.$h[electronic resource]
260 $c2015
500 $aArticle history: Received 30 September 2014; Accepted 29 June 2015.
520 $aMethods to measure enteric methane (CH4) emissions from individual ruminants in their production environment are required to validate emission inventories and verify mitigation claims. Estimates of daily methane production (DMP) based on consolidated short-term emission measurements are developing, but method verification is required. Two cattle experiments were undertaken to test the hypothesis that DMP estimated by averaging multiple short-term breath measures of methane emission rate did not differ from DMP measured in respiration chambers (RC). Short-term emission rates were obtained from a GreenFeed Emissions Monitoring (GEM) unit, which measured emission rate while cattle consumed a dispensed supplement. In experiment 1 (Expt. 1), four non-lactating cattle (LW = 518 kg) were adapted for 18 days then measured for six consecutive periods. Each period consisted of 2 days of ad libitum intake and GEM emission measurement followed by 1 day in the RC. A prototype GEM unit releasing water as an attractant (GEM water) was also evaluated in Expt. 1. Experiment 2 (Expt. 2) was a larger study based on similar design with 10 cattle (LW = 365 kg), adapted for 21 days and GEM measurement was extended to 3 days in each of the six periods. In Expt. 1, there was no difference in DMP estimated by the GEM unit relative to the RC (209.7 v. 215.1 g CH4/day) and no difference between these methods in methane yield (MY, 22.7 v. 23.7 g CH4/kg of dry matter intake, DMI). In Expt. 2, the correlation between GEM and RC measures of DMP and MY were assessed using 95% confidence intervals, with no difference in DMP or MY between methods and high correlations between GEM and RC measures for DMP ( r = 0.85; 215 v. 198 g CH4/day SEM = 3.0) and for MY ( r = 0.60; 23.8 v. 22.1 g CH4/kg DMI SEM = 0.42). When data from both experiments was combined neither DMP nor MY differed between GEM- and RC-based measures ( P >0.05). GEM water-based estimates of DMP and MY were lower than RC and GEM ( P <0.05). Cattle accessed the GEM water unit with similar frequency to the GEM unit (2.8 v. 3.5 times/day, respectively) but eructation frequency was reduced from 1.31 times/min (GEM) to once every 2.6 min (GEM water). These studies confirm the hypothesis that DMP estimated by averaging multiple short-term breath measures of methane emission rate using GEM does not differ from measures of DMP obtained from RCs. Further, combining many short-term measures of methane production rate during supplement consumption provides an estimate of DMP, which can be usefully applied in estimating MY.
650 $aGANADO
650 $aGASES DE EFECTO INVERNADERO
650 $aMEDIDAS
653 $aCATTLE
653 $aGAS METANO
653 $aGREENHOUSE GASES
653 $aMEASUREMENT
653 $aMETHANE
700 1 $aMAYER, D.G.
700 1 $aZIMMERMAN, S.
700 1 $aHEGARTY, S.
773 $tAnimal, 2015$gv. 10 (1) p. 25-33.
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! |
|
|
