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Tumino S, Mangano F, Bognanno M, Bordonaro S, Chessari G, De Angelis A, Avondo M. Effects of BLG polymorphism and dietary supplementation with carob pulp on ewe milk traits and fatty acid composition. ITALIAN JOURNAL OF ANIMAL SCIENCE 2023. [DOI: 10.1080/1828051x.2023.2187713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Serena Tumino
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
| | - Fabrizio Mangano
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
| | - Matteo Bognanno
- Dipartimento di Scienze e Tecnologie Agro-forestali e Ambientali, University of Reggio Calabria, Reggio Calabria, Italy
| | - Salvatore Bordonaro
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
| | - Giorgio Chessari
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
| | - Anna De Angelis
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
| | - Marcella Avondo
- Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Catania, Italy
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Brito AF, Tremblay GF, Bertrand A, Castonguay Y, Bélanger G, Michaud R, Lafrenière C, Martineau R, Berthiaume R. Performance and nitrogen use efficiency in mid-lactation dairy cows fed timothy cut in the afternoon or morning. J Dairy Sci 2016; 99:5445-5460. [PMID: 27085409 DOI: 10.3168/jds.2015-10597] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 03/01/2016] [Indexed: 11/19/2022]
Abstract
Shifting cutting from morning to afternoon has been shown to increase the concentration of nonstructural carbohydrates in forages. We hypothesized that, compared with a total mixed ration containing timothy baleage and silage cut in the morning (a.m.-cut TIM), a total mixed ration containing timothy baleage and silage cut in the afternoon (p.m.-cut TIM) would improve animal performance and N use efficiency in mid-lactation Holstein cows due to enhanced supply of ruminal fermentable energy. The objective of this study was to compare the effects of p.m.- versus a.m.-cut TIM on milk yield, concentrations and yields of milk components, ruminal metabolism, and plasma concentrations of AA in mid-lactation Holstein cows. Ten (6 ruminally cannulated) primiparous cows averaging 139±13 d in milk and 550±56 kg of body weight, and 6 (2 ruminally cannulated) multiparous cows averaging 128±11 d in milk and 632±57 kg of body weight at the beginning of the experiment, were used in a crossover design. Each period lasted 21 d with 14 d for diet adaptation and 7 d for data and sample collection. The concentration of nonstructural carbohydrates (water-soluble carbohydrates plus starch) was numerically greater in the p.m.- versus the a.m.-cut TIM and averaged 13.2±1.06% and 12.2±1.13%, respectively. Treatment × parity effects were observed for milk urea N, feed efficiency, and milk N efficiency, whereas parity effects were observed for nutrient intake, milk yield, and plasma concentration of several essential and nonessential AA. Intakes of dry matter (19.3 versus 18.6 kg/d) and nonstructural carbohydrates (2.56 versus 2.31 kg/d), and yields of 4% fat-corrected milk (23.1 versus 22.2 kg/d), energy-corrected milk (25.0 versus 24.1 kg/d), milk fat (0.91 versus 0.88 kg/d), and milk protein (0.77 versus 0.73 kg/d) were all greatest with feeding p.m.-cut TIM. Milk yield (23.5 versus 22.7 kg/d) tended to increase in cows fed p.m.-cut TIM. The ruminal fermentation profiles and plasma concentrations of AA were mostly unaffected by treatments. However, ruminal valerate (1.01 versus 1.17 mol/100 mol) and plasma Gly (172 versus 188 µM) were lowest with feeding p.m.-cut TIM. Overall, feeding mid-lactation dairy cows a total mixed ration that consisted of p.m.-cut timothy baleage and silage significantly increased dry matter intake and yields of milk, milk fat, and milk protein.
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Affiliation(s)
- A F Brito
- Department of Biological Sciences, University of New Hampshire, Durham 03824
| | - G F Tremblay
- Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec City, QC, Canada G1V 2J3
| | - A Bertrand
- Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec City, QC, Canada G1V 2J3
| | - Y Castonguay
- Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec City, QC, Canada G1V 2J3
| | - G Bélanger
- Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec City, QC, Canada G1V 2J3
| | - R Michaud
- Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec City, QC, Canada G1V 2J3
| | - C Lafrenière
- Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, QC, Canada J9X 5E4
| | - R Martineau
- Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 1Z3
| | - R Berthiaume
- Valacta, Dairy Production Centre of Expertise Québec-Atlantic, Sainte-Anne-de-Bellevue, QC, Canada H9X 3R4.
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