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EnglishBioavailability of methionine (Met) of three commercial supplements was assessed in three lactating dairy cows by a standardized blood plasma test. A spot dose of rumen-protected D,L-Met (SmartamineMTM or SM; 65.4 g/cow/day), Met hydroxy analog (Alimet® or AL; 57.5 g/cow/day) and its isopropyl ester (MetaSmart or MT; 88.5 g/cow/day) were fed daily (9:00h) by oral bolus, providing 50 g/cow/day of D,L-Met, to 3 cows in a Latin square design. Blood samples were obtained by jugular venipunctures the day before (day 0) and five days after (day 5) the treatment at 9:30h, 13:00h and 17:00h and plasma was harvested. On day 0, the Met concentration was similar among treatments. At day 5, the plasma Met was increased with a different response (P<0.05) among treatments: +285.8% for SM (89.67 at day 5 versus 23.79 μmol/L at day 0), +167.2% (55.62 versus 21.60 μmol/L, respectively) for MT and +50.9% for AL (35.07 versus 23.19 μmol/L, respectively).
Masoero, F., Fiorentini, L., Moschini, M., Piva, G., Gallo, A., Blood methionine concentration in dairy cows supplemented with rumen-protected methionine or two methionine hydroxy analogs., Abstract de <<Proceedings of the ASPA 18th Congress>>, (Palermo, 09-12 June 2009 ), Edizioni Avenue media, Bologna 2009: 354-354 [http://hdl.handle.net/10807/10655]
| Autori: | ||
| Titolo: | Blood methionine concentration in dairy cows supplemented with rumen-protected methionine or two methionine hydroxy analogs. | |
| Data di pubblicazione: | 2009 | |
| Abstract: | Bioavailability of methionine (Met) of three commercial supplements was assessed in three lactating dairy cows by a standardized blood plasma test. A spot dose of rumen-protected D,L-Met (SmartamineMTM or SM; 65.4 g/cow/day), Met hydroxy analog (Alimet® or AL; 57.5 g/cow/day) and its isopropyl ester (MetaSmart or MT; 88.5 g/cow/day) were fed daily (9:00h) by oral bolus, providing 50 g/cow/day of D,L-Met, to 3 cows in a Latin square design. Blood samples were obtained by jugular venipunctures the day before (day 0) and five days after (day 5) the treatment at 9:30h, 13:00h and 17:00h and plasma was harvested. On day 0, the Met concentration was similar among treatments. At day 5, the plasma Met was increased with a different response (P<0.05) among treatments: +285.8% for SM (89.67 at day 5 versus 23.79 μmol/L at day 0), +167.2% (55.62 versus 21.60 μmol/L, respectively) for MT and +50.9% for AL (35.07 versus 23.19 μmol/L, respectively). | |
| Nome del convegno: | Proceedings of the ASPA 18th Congress | |
| Luogo del convegno: | Palermo | |
| Data inizio evento: | 2009-06-09 | |
| Data fine evento: | 2009-06-12 | |
| Lingua: | Inglese | |
| Titolo del libro: | Italian Journal of Animal Science | |
| ISBN: | 1594-4077 | |
| Editore: | Edizioni Avenue media | |
| Citazione: | Masoero, F., Fiorentini, L., Moschini, M., Piva, G., Gallo, A., Blood methionine concentration in dairy cows supplemented with rumen-protected methionine or two methionine hydroxy analogs., Abstract de <<Proceedings of the ASPA 18th Congress>>, (Palermo, 09-12 June 2009 ), Edizioni Avenue media, Bologna 2009: 354-354 [http://hdl.handle.net/10807/10655] | |
| Appare nelle tipologie: | Abstract (se pubblicati in Atti di Convegno, Congresso, ecc.) |
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