Effects of specific essential oil compounds on the ruminal environment, milk production and milk composition of lactating dairy cows at pasture
Sixty multiparous, lactating Holstein cows [57more or less 23.1. d in milk at the start of the experiment] were used in a completely randomized design to examine effects of adding incremental levels of dietary essential oil compounds [EO; 0, 200, 400 and 600. mg/d] on milk production and composition...
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2013flores.pdf LINK AL EDITOR |
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| 100 | 1 | |a Flores, Angela J. |9 72484 | |
| 245 | 0 | 0 | |a Effects of specific essential oil compounds on the ruminal environment, milk production and milk composition of lactating dairy cows at pasture |
| 520 | |a Sixty multiparous, lactating Holstein cows [57more or less 23.1. d in milk at the start of the experiment] were used in a completely randomized design to examine effects of adding incremental levels of dietary essential oil compounds [EO; 0, 200, 400 and 600. mg/d] on milk production and composition. Cows were allowed to graze on winter oats for 8. h/d with a daily herbage allowance of 15. kg dry matter [DM]/cow, and then received supplemental corn silage and sunflower meal in confinement for the remainder of the day. The EO were fed individually at milking times [0600 and 1600. h], mixed with 0.86. kg DM of dry rolled corn grain. In addition, 4 ruminally cannulated lactating Holstein cows in mid lactation were used in a 4x4 Latin Square design with 14. d periods to study effects of EO on ruminal fermentation characteristics and ruminal in sacco DM, crude protein [CP], and neutral detergent fiber [aNDF] degradability. Milk production, which ranged from 18.8 to 20.2. kg/d, and milk composition were not affected by EO. In general, ruminal fermentation characteristics were not affected by EO addition at any level, except for a 13 percent increase in butyrate concentrations with all EO levels compared to the control. Ruminal ammonia N concentration was high in all treatments [51.5 more or less 5.75. mg/100. ml] and tended [P=0.09] to increase when 200 and 400. mg/d of EO were added. In addition, 200. mg/d of EO marginally decreased the potentially ruminally degradable fraction of the CP of the complete ration. Results using dairy cows in mid lactation that grazed 8. h/d on lush pasture showed limited effects of this EO complex on ruminal fermentation, milk production and milk composition. | ||
| 653 | 0 | |a DAIRY COW | |
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| 700 | 1 | |9 64028 |a Garciarena, Alberto Daniel | |
| 700 | 1 | |a Hernández Vieyra, Juan Manuel |9 10997 | |
| 700 | 1 | |9 72076 |a Beauchemin, Karen A. | |
| 700 | 1 | |9 10874 |a Colombatto, Darío | |
| 773 | |t Animal Feed Science and Technology |g vol.186, no.1-2 (2013), p.20-26 | ||
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| 900 | |a ^tEffects of specific essential oil compounds on the ruminal environment, milk production and milk composition of lactating dairy cows at pasture | ||
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| 900 | |a ^aFlores^bA.J.^tInstituto Nacional de Tecnología Agropecuaria, CC 38, 3470 Mercedes, Corrientes, Argentina | ||
| 900 | |a ^aGarciarena^bA.D.^tInstituto Nacional de Tecnología Agropecuaria, Km 73.5 Ruta Nacional 226, 7620 Balcarce, Argentina | ||
| 900 | |a ^aHernández Vieyra^bJ.M.^tArgent Export SA, Av. Mitre 242, 1603 Villa Martelli, Argentina | ||
| 900 | |a ^aBeauchemin^bK.A.^tResearch Centre, Agriculture and Agri-Food Canada, Lethbridge, AL, T1J 4B1, Canada | ||
| 900 | |a ^aColombatto^bD.^tDepartamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSQ Buenos Aires, Argentina | ||
| 900 | |a ^aColombatto^bD.^tCONICET, Argentina | ||
| 900 | |a ^tAnimal Feed Science and Technology^cAnim. Feed Sci. Technol. | ||
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| 900 | |a DAIRY COW | ||
| 900 | |a DIGESTION | ||
| 900 | |a ESSENTIAL OIL | ||
| 900 | |a FEED ADDITIVES | ||
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| 900 | |a Sixty multiparous, lactating Holstein cows [57more or less 23.1. d in milk at the start of the experiment] were used in a completely randomized design to examine effects of adding incremental levels of dietary essential oil compounds [EO; 0, 200, 400 and 600. mg/d] on milk production and composition. Cows were allowed to graze on winter oats for 8. h/d with a daily herbage allowance of 15. kg dry matter [DM]/cow, and then received supplemental corn silage and sunflower meal in confinement for the remainder of the day. The EO were fed individually at milking times [0600 and 1600. h], mixed with 0.86. kg DM of dry rolled corn grain. In addition, 4 ruminally cannulated lactating Holstein cows in mid lactation were used in a 4x4 Latin Square design with 14. d periods to study effects of EO on ruminal fermentation characteristics and ruminal in sacco DM, crude protein [CP], and neutral detergent fiber [aNDF] degradability. Milk production, which ranged from 18.8 to 20.2. kg/d, and milk composition were not affected by EO. In general, ruminal fermentation characteristics were not affected by EO addition at any level, except for a 13 percent increase in butyrate concentrations with all EO levels compared to the control. Ruminal ammonia N concentration was high in all treatments [51.5 more or less 5.75. mg/100. ml] and tended [P=0.09] to increase when 200 and 400. mg/d of EO were added. In addition, 200. mg/d of EO marginally decreased the potentially ruminally degradable fraction of the CP of the complete ration. Results using dairy cows in mid lactation that grazed 8. h/d on lush pasture showed limited effects of this EO complex on ruminal fermentation, milk production and milk composition. | ||
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