TY - JOUR
T1 - Production effects of feeding extruded soybean meal to early-lactation dairy cows
AU - Harper, M. T.
AU - Oh, J.
AU - Melgar, A.
AU - Nedelkov, K.
AU - Räisänen, S.
AU - Chen, X.
AU - Martins, C. M.M.R.
AU - Young, M.
AU - Ott, T. L.
AU - Kniffen, D. M.
AU - Fabin, R. A.
AU - Hristov, A. N.
N1 - Funding Information:
This work was supported by the USDA National Institute of Food and Agriculture Federal Appropriations (Washington, DC) under Project PEN 04539 and Accession number 1000803. We thank the Pennsylvania Soybean Board (Harrisburg) for partial financial support for this research. Additionally, we extend a special thanks to Fabin Bros. Farm (Indiana, PA) for providing us with the extruded soybean meal. We also thank the staff of The Pennsylvania State University's Dairy Teaching and Research Center (University Park) for their conscientious care of the experimental cows.
Publisher Copyright:
© 2019 American Dairy Science Association
PY - 2019/10
Y1 - 2019/10
N2 - The objective of this experiment was to evaluate productive and reproductive effects of replacing solvent-extracted soybean meal (SSBM) with extruded soybean meal (ESBM) in a total mixed ration for early-lactation dairy cows. Thirty-four Holstein cows (12 primiparous and 22 multiparous) were used in a randomized complete block design experiment with 17 cows per treatment. Feeding was ad libitum for 5 to 10% refusals. A fresh-cow diet was fed the first 21 d in milk followed by a lactation diet from 22 to 60 d in milk. Milk and dry matter intake data were collected throughout the experiment, and samples were collected for blood chemistry and amino acid profile, nutrient digestibility, nitrogen utilization, and enteric methane emission using the GreenFeed system (C-Lock Inc., Rapid City, SD). Dry matter intake, milk yield, and feed efficiency were not different between SSBM and ESBM. Energy-corrected milk yield and efficiency were also not different between diets. Diet had no effect on milk composition, except that milk true protein yield was decreased by ESBM. Enteric methane emission, yield, and intensity were not different between SSBM and ESBM. Because of its greater fat content, ESBM triggered expected changes in milk fatty acid (FA) profile: decreased sum of C16, saturated, and odd- and branched-chain FA and increased sum of preformed FA, polyunsaturated, and trans FA. The ESBM diet increased or tended to increase some essential amino acids in plasma. In this study, ESBM did not affect dry matter intake and did not improve lactational performance or onset of ovarian function in early-lactation dairy cows, and it decreased milk protein yield, possibly due to greater unsaturated FA intake compared with SSBM.
AB - The objective of this experiment was to evaluate productive and reproductive effects of replacing solvent-extracted soybean meal (SSBM) with extruded soybean meal (ESBM) in a total mixed ration for early-lactation dairy cows. Thirty-four Holstein cows (12 primiparous and 22 multiparous) were used in a randomized complete block design experiment with 17 cows per treatment. Feeding was ad libitum for 5 to 10% refusals. A fresh-cow diet was fed the first 21 d in milk followed by a lactation diet from 22 to 60 d in milk. Milk and dry matter intake data were collected throughout the experiment, and samples were collected for blood chemistry and amino acid profile, nutrient digestibility, nitrogen utilization, and enteric methane emission using the GreenFeed system (C-Lock Inc., Rapid City, SD). Dry matter intake, milk yield, and feed efficiency were not different between SSBM and ESBM. Energy-corrected milk yield and efficiency were also not different between diets. Diet had no effect on milk composition, except that milk true protein yield was decreased by ESBM. Enteric methane emission, yield, and intensity were not different between SSBM and ESBM. Because of its greater fat content, ESBM triggered expected changes in milk fatty acid (FA) profile: decreased sum of C16, saturated, and odd- and branched-chain FA and increased sum of preformed FA, polyunsaturated, and trans FA. The ESBM diet increased or tended to increase some essential amino acids in plasma. In this study, ESBM did not affect dry matter intake and did not improve lactational performance or onset of ovarian function in early-lactation dairy cows, and it decreased milk protein yield, possibly due to greater unsaturated FA intake compared with SSBM.
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U2 - 10.3168/jds.2019-16551
DO - 10.3168/jds.2019-16551
M3 - Article
C2 - 31421886
AN - SCOPUS:85070561238
SN - 0022-0302
VL - 102
SP - 8999
EP - 9016
JO - Journal of Dairy Science
JF - Journal of Dairy Science
IS - 10
ER -