Abstract #455
Section: Ruminant Nutrition
Session: Ruminant Nutrition VI
Format: Oral
Day/Time: Wednesday 11:45 AM–12:00 PM
Location: 310/311
Session: Ruminant Nutrition VI
Format: Oral
Day/Time: Wednesday 11:45 AM–12:00 PM
Location: 310/311
# 455
Feeding canola meal and Smartamine-M in diets with field peas to lactating dairy cows.
A. B. D. Pereira*1,2, A. F. Brito1, N. L. Whitehouse1, D. C. Moura3, B. C. Downey1,4, A. S. Oliveira5, 1University of New Hampshire, Department of Biological Sciences, Durham, NH, 2Purina Animal Nutrition LLC, Shoreview, MN, 3Universidade Federal de Mato Grosso, Programa de Pós Graduação em Ciência Animal, Cuiabá, MT, Brazil, 4University of California Davis, Department of Animal Science, Davis, CA, 5Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Ambientais, Sinop, MT, Brazil.
Key Words: canola meal, field peas, Smartamine-M
Feeding canola meal and Smartamine-M in diets with field peas to lactating dairy cows.
A. B. D. Pereira*1,2, A. F. Brito1, N. L. Whitehouse1, D. C. Moura3, B. C. Downey1,4, A. S. Oliveira5, 1University of New Hampshire, Department of Biological Sciences, Durham, NH, 2Purina Animal Nutrition LLC, Shoreview, MN, 3Universidade Federal de Mato Grosso, Programa de Pós Graduação em Ciência Animal, Cuiabá, MT, Brazil, 4University of California Davis, Department of Animal Science, Davis, CA, 5Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Ambientais, Sinop, MT, Brazil.
Our previous research showed that cows fed ground field peas (GFP) and soybean meal (SBM) had lesser milk protein yield and plasma Met concentration than those fed GFP + SBM supplemented with rumen-protected (RP)-Lys and RP-Met. However, supplementation with RP-AA decreased the concentration of His in plasma. Compared with SBM, canola meal (CM) has been shown to improve DMI, milk yield, and plasma concentrations of most EAA, including His. We hypothesize that GFP + CM would increase production performance and plasma EAA compared with GFP + SBM, and that RP-Met would be needed due to the poor Met content of GFP. Sixteen mid-lactation Holstein cows were used in a replicated 4 × 4 Latin square with a 2 × 2 factorial arrangement of treatments, with 14 d of diet adaptation and 7 d for data collection in each period. Cows were fed (DM basis) 35% corn silage, 14% grass-legume silage, 25% GFP, and: 1) 11% SBM (FPSB), 2) 13.5% CM (FPCM), 3) 11% SBM + 27 g/d of RP-Met (Smartamine-M) (FPSBM), or 4) 13.5% CM + 27 g/d of RP-Met (FPCMM). Contrasts were used to compare the effects of RDP source, RP-Met supplementation, and FPSBM vs. FPCMM. Diets averaged 16.9% CP, 28.3% NDF, and 31% starch. Cows fed CM had greatest DMI, milk and milk protein yields, and least MUN. Plasma Lys and His tended to increase with feeding CM. Supplementing RP-Met increased the concentrations of milk protein and plasma Met. Animals fed FPSBM had lower plasma Met and His concentrations compared with FPCMM. Overall, CM appears to be a better RDP source than SBM in diets with GFP, and RP-Met was required with feeding 25% GFP.
Table 1. Production performance and plasma concentrations of EAA
| Item | Treatment | SEM | P - Contrasts | |||||
| FPSB | FPSBM | FPCM | FPCMM | RDP | RP-Met | FPSBM vs. FPCMM | ||
| DMI, kg/d | 28.1 | 27.8 | 28.6 | 29.1 | 0.77 | <0.01 | 0.80 | <0.01 |
| Milk yield, kg/d | 39.3 | 38.4 | 40.4 | 40.6 | 1.99 | <0.001 | 0.44 | <0.01 |
| Milk fat, % | 3.60 | 3.52 | 3.53 | 3.55 | 0.11 | 0.64 | 0.42 | 0.62 |
| Milk protein, % | 3.32 | 3.44 | 3.32 | 3.38 | 0.07 | 0.17 | <0.001 | 0.04 |
| Milk protein, kg/d | 1.29 | 1.31 | 1.34 | 1.37 | 0.06 | <0.01 | 0.14 | 0.02 |
| MUN, mg/dL | 13.0 | 12.7 | 11.7 | 12.0 | 0.53 | <0.001 | 0.93 | 0.06 |
| Plasma Lys, µM | 87.9 | 88.3 | 92.1 | 94.4 | 4.28 | 0.06 | 0.62 | 0.11 |
| Plasma Met, µM | 22.1 | 36.6 | 25.1 | 40.2 | 0.57 | <0.001 | <0.001 | <0.01 |
| Plasma His, µM | 62.4 | 57.9 | 62.0 | 64.0 | 2.89 | 0.09 | 0.46 | 0.01 |
Key Words: canola meal, field peas, Smartamine-M
