Abstract #125
Section: Ruminant Nutrition (orals)
Session: Ruminant Nutrition 1: Protein and Amino Acid I
Format: Oral
Day/Time: Monday 12:15 PM–12:30 PM
Location: Junior Ballroom D
Session: Ruminant Nutrition 1: Protein and Amino Acid I
Format: Oral
Day/Time: Monday 12:15 PM–12:30 PM
Location: Junior Ballroom D
# 125
Effects of soybean meals versus canola meal on the lactational performance, enteric gas emission, and plasma amino acid profile in dairy cows.
C. F. A. Lage*1,2, S. E. Räisänen1, A. Melgar1, X. Chen1,3, J. Oh1, D. M. Kniffen1, R. A. Fabin4, M. E. Young1, A. N. Hristov1, 1The Pennsylvania State University, University Park, PA, 2Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 3College of Pastoral Agriculture Science and Technology, Lanzhou University, China, 4Fabin Bros. Farms, Indiana, PA.
Key Words: soybean meal, canola meal, dairy cattle
Effects of soybean meals versus canola meal on the lactational performance, enteric gas emission, and plasma amino acid profile in dairy cows.
C. F. A. Lage*1,2, S. E. Räisänen1, A. Melgar1, X. Chen1,3, J. Oh1, D. M. Kniffen1, R. A. Fabin4, M. E. Young1, A. N. Hristov1, 1The Pennsylvania State University, University Park, PA, 2Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 3College of Pastoral Agriculture Science and Technology, Lanzhou University, China, 4Fabin Bros. Farms, Indiana, PA.
This study investigated the effects of feeding solvent-extracted soybean meal (SSBM), canola meal (CM), or extruded soybean meal (ESBM) on an equivalent crude protein (CP) basis on lactational performance, enteric gas emission and plasma AA profile in dairy cows. Fifteen Holstein cows [95 (SD = 20) days in milk] were used in a replicated 3 × 3 Latin square design experiment with 3, 28-d periods. The diets contained (DM basis): 13.6% SSBM (52% CP, 67.8% ruminal degradability, RDP), 14.2% ESBM (49% CP, 43.7% RDP), or 17.1% CM (40.7% CP, 41.5% RDP). The diets met or exceeded the nutrient requirements of the cows for net energy of lactation and metabolizable protein. Vegetable oil (canola oil for CM or soybean oil for SSBM) was added to equalize the ether extract of the diets. Rumen-protected Met was used to ensure a digestible Met supply of 2.2% of MP in all diets. Data were analyzed using the MIXED procedure of SAS as repeated measures with the ar(1) covariance structure and square and cow within square as random effects. CM increased (P < 0.001) dry matter intake (DMI; 26.9 kg/d; SEM = 0.82) compared with ESBM and SSBM (25.3 and 24.5 kg/d, respectively). CM and ESBM increased (P = 0.002) milk yield (43.8 and 42.6 kg/d; SEM = 1.82) compared with SSBM (41.1 kg/d). Treatment did not affect milk composition or feed efficiency (P > 0.05). Milk urea N concentration was lowest (P < 0.001) in CM, followed by SSBM and was highest for ESBM. Compared with CM and SSBM, ESBM increased (P ≤ 0.003) plasma concentrations of Ile, Leu, Val, and the sum of EAA and decreased (P < 0.001) Met and Cys. Animals fed CM produced less (P = 0.008) enteric methane per kg of DMI (15.0 g/kg) than both ESBM (16.9 g/kg) and SSBM (17.0 g/kg), but methane emission intensity was similar (P = 0.14) among treatments (average 9.9 g/kg energy-corrected milk; SEM = 0.60). In summary, data suggest that substitution of soybean meals with CM, on an equal CP basis, may enhance DMI. The substitution of SSBM with ESBM or CM may enhance lactational performance in dairy cows.
Key Words: soybean meal, canola meal, dairy cattle
