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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha : |
24/11/2015 |
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Actualizado : |
19/09/2018 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
VELAZCO, J.I.; MAYER, D.G.; ZIMMERMAN, S.; HEGARTY, S. |
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Afiliación : |
JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Use of short-term breath measures to estimate daily methane production by cattle. |
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Fecha de publicación : |
2015 |
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Fuente / Imprenta : |
Animal, 2015, v. 10 (1) p. 25-33. |
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ISBN : |
10.1017/s1751731115001603 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 30 September 2014; Accepted 29 June 2015. |
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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 |
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Palabras claves : |
CATTLE; GAS METANO; GREENHOUSE GASES; MEASUREMENT; METHANE. |
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Thesagro : |
GANADO; GASES DE EFECTO INVERNADERO; MEDIDAS. |
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Asunto categoría : |
T01 Polución |
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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.
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Registro original : |
INIA Treinta y Tres (TT) |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha actual : |
21/02/2014 |
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Actualizado : |
11/10/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
B - 2 |
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Autor : |
BANCHERO, G.; QUINTANS, G.; VAZQUEZ, A.; GIGENA, F.; LA MANNA, A.; LINDSAY, D.R.; MILTON, T.B. |
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Afiliación : |
GEORGGET ELIZABETH BANCHERO HUNZIKER, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; GRACIELA QUINTANS ILARIA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; ANDRÉS VÁZQUEZ, ESTUDIANTE GRADO FACULTAD DE AGRONOMÍA, URUGUAY; FRANCISCO GIGENA, ESTUDIANTE GRADO FACULTAD DE AGRONOMÍA, URUGUAY; ALEJANDRO FRANCISCO LA MANNA ALONSO, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
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Título : |
Effect of supplementation of ewes with barley or maize during the last week of pregnancy on colostrum production. |
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Fecha de publicación : |
2007 |
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Fuente / Imprenta : |
Animal, 2007, no. 1, p. 625-630 |
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DOI : |
10.1017/S1751731107691885 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 11 September 2006; Accepted 13 December 2006; Published Jan. 2007. |
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Contenido : |
Abstract:
The experiment tested the hypothesis that short-term feeding of barley just before lambing would be as effective as maize in stimulating early production of colostrum. Both grains are high in starch, and should provide a substrate for lactose which, in turn, promotes lactogenesis. Thirty-five Corriedale ewes bearing single foetuses and 25 bearing twin-foetuses from a synchronised mating were fed on pasture during most of gestation. Fourteen days before the expected time of lambing the single- and twin-bearing ewes were allocated to three treatments and fed (1) a basal diet of lucerne hay to meet their nutrient requirements, (2) the basal diet plus a supplement of whole barley; or (3) the basal diet plus a supplement of cracked maize. The twin-bearing control ewes accumulated more colostrum than the single-bearing control ewes at birth (292v.190 g). However, supplementation
with barley or maize increased the colostrum at birth to 360 and 541 g in singles and 648 and 623 g in twins. We conclude that barley is a good alternative to maize to stimulate production of colostrum especially in twin-bearing ewes whose lambs are the most likely to benefit from the supplement. |
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Thesagro : |
CORDEROS; GANADO OVINO; LACTOSA; PRENEZ; URUGUAY. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 02037naa a2200277 a 4500
001 1032833
005 2019-10-11
008 2007 bl uuuu u00u1 u #d
024 7 $a10.1017/S1751731107691885$2DOI
100 1 $aBANCHERO, G.
245 $aEffect of supplementation of ewes with barley or maize during the last week of pregnancy on colostrum production.$h[electronic resource]
260 $c2007
500 $aArticle history: Received 11 September 2006; Accepted 13 December 2006; Published Jan. 2007.
520 $aAbstract: The experiment tested the hypothesis that short-term feeding of barley just before lambing would be as effective as maize in stimulating early production of colostrum. Both grains are high in starch, and should provide a substrate for lactose which, in turn, promotes lactogenesis. Thirty-five Corriedale ewes bearing single foetuses and 25 bearing twin-foetuses from a synchronised mating were fed on pasture during most of gestation. Fourteen days before the expected time of lambing the single- and twin-bearing ewes were allocated to three treatments and fed (1) a basal diet of lucerne hay to meet their nutrient requirements, (2) the basal diet plus a supplement of whole barley; or (3) the basal diet plus a supplement of cracked maize. The twin-bearing control ewes accumulated more colostrum than the single-bearing control ewes at birth (292v.190 g). However, supplementation with barley or maize increased the colostrum at birth to 360 and 541 g in singles and 648 and 623 g in twins. We conclude that barley is a good alternative to maize to stimulate production of colostrum especially in twin-bearing ewes whose lambs are the most likely to benefit from the supplement.
650 $aCORDEROS
650 $aGANADO OVINO
650 $aLACTOSA
650 $aPRENEZ
650 $aURUGUAY
700 1 $aQUINTANS, G.
700 1 $aVAZQUEZ, A.
700 1 $aGIGENA, F.
700 1 $aLA MANNA, A.
700 1 $aLINDSAY, D.R.
700 1 $aMILTON, T.B.
773 $tAnimal, 2007, no. 1, p. 625-630
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