Abstract #W122
Section: Ruminant Nutrition (posters)
Session: Ruminant Nutrition: Fat and Lipids
Format: Poster
Day/Time: Wednesday 7:30 AM–9:30 AM
Location: Exhibit Hall A
Session: Ruminant Nutrition: Fat and Lipids
Format: Poster
Day/Time: Wednesday 7:30 AM–9:30 AM
Location: Exhibit Hall A
# W122
Milk fatty acids profile, blood serum, and oocyte quality of early-lactation dairy cows supplemented with linseed oil coated with vegetable fat or extruded linseed.
J. Ruiz Rodríguez1, M. Puyalto2, J. Mallo2, G. Elcoso3, A. Bach*4,5, 1Department of Agrarian Production, Polytechnic University of Madrid, Madrid, Spain, 2Norel S.A, Madrid, Spain, 3Blaca from the Pyrenees, Hostalets de Tost, Spain, 4Department of Ruminant Production, IRTA, Caldes de Montbui, Spain, 5ICREA, Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain.
Key Words: linseed, linolenic acid, palm fatty acid distillates (PFAD)
Milk fatty acids profile, blood serum, and oocyte quality of early-lactation dairy cows supplemented with linseed oil coated with vegetable fat or extruded linseed.
J. Ruiz Rodríguez1, M. Puyalto2, J. Mallo2, G. Elcoso3, A. Bach*4,5, 1Department of Agrarian Production, Polytechnic University of Madrid, Madrid, Spain, 2Norel S.A, Madrid, Spain, 3Blaca from the Pyrenees, Hostalets de Tost, Spain, 4Department of Ruminant Production, IRTA, Caldes de Montbui, Spain, 5ICREA, Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain.
The aim of the study was to evaluate the effects of supplementing extruded linseed or linseed oil coated with hydrogenated palm fatty acid distillates (HPFAD) on milk fatty acid (FA) profile, oocyte quality and glucose, immunoglobulin IgG1 and NEFA blood serum of early-lactation dairy cows. Sixty-three Holstein cows (591 ± 84 kg BW, 42 ± 24.8 DIM, 37.2 ± 10.6 kg of milk/d) were randomly distributed in 3 groups (n = 21) and exposed for 84 d to 3 treatments following a complete randomized design. Treatments consisted of supplementation of 500 g/d of HPFAD (CTR), 350 g/d of extruded linseed and 390 g/d of HPFAD (EXT), or 500 g/d of HPFAD coated flaxseed oil (HFL). Both, HFL and EXT provided the same amount of C18:3. Cows were fed a TMR (15.5% CP, 33.7% NDF, 1.65Mcal of NEl/kg; DM basis) twice daily. Milk FA profile was determined at d 0, 5, 10, 28, 56 and 84. Blood glucose, NEFA, and IgG1 concentrations were determined at d 0, 28, 56 and 84. Oocyte pickup was performed at d 50 and oocyte quality was evaluated morphologically. Animal was the experimental unit and milk FA profile and serum results were analyzed using a mixed-effects model for repeated measures. Oocyte quality was analyzed using ordinal logistic regression. Results for FA are shown in Table 1. Serum glucose concentration was steady throughout the study in HFL cows, but it progressively decreased in CTR and EXT cows. Serum NEFA concentrations progressively decreased as lactation progressed. Serum IgG1 concentration in EXT cows was low except for an increase at d 84, whereas it remained steady in CTR and HFL cows. The odds of having second quality category oocytes was greater (1.62 more chances) in HFL and EXT compared with CTR. We conclude that HFL and EXT improve milk FA profile and show potential to improve oocyte quality in early-lactation cows.
Table 1 (Abstr. W122). Milk FA composition per treatment
| Fatty acid, % | CTR | EXT | HFL | SE | P-value |
| C18:3 | 0.48a | 0.64b | 0.67b | 0.05 | <0.0001 |
| C20:5 | 0.059b | 0.070a | 0.069a | 0.001 | 0.01 |
| Total unsaturated | 3.96b | 4.35a | 4.25a | 0.07 | <0.01 |
| Total n-3 | 0.60b | 0.80a | 0.83a | 0.01 | <0.0001 |
Key Words: linseed, linolenic acid, palm fatty acid distillates (PFAD)
