TY - JOUR
T1 - Energy content of reduced-fat dried distillers grains with solubles for lactating dairy cows
AU - Foth, A. J.
AU - Brown-Brandl, T.
AU - Hanford, K. J.
AU - Miller, P. S.
AU - Garcia Gomez, G.
AU - Kononoff, P. J.
N1 - Funding Information:
The authors thank the employees of the University of Nebraska–Lincoln Dairy Research Facility for care and management of all experimental animals. Additional gratitude is expressed to Poet LLC (Sioux Falls, SD) for partial financial support and K. Karges, formerly of Poet LLC, for his feedback and ideas.
Publisher Copyright:
© 2015 American Dairy Science Association.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - Eight Holstein and 8 Jersey multiparous, lactating cows were used to complete 56 energy balances to determine the energy content of reduced-fat dried distillers grains with solubles (RFDDGS). A repeated switchback design was used to compare treatments with and without RFDDGS. Diets consisted of 24.2% corn silage, 18.4% alfalfa hay, 6.94% brome hay with either 22.9% rolled corn or 14.8% soybean meal (control), or 8.95% rolled corn, 28.8% RFDDGS, and 0% soybean meal [Co-P; dry-matter (DM) basis]. The inclusion of RFDDGS did not affect DM intake, averaging 21.4 ± 0.53. kg of DM for all cows, but milk production tended to increase from 29.8 to 30.9 ± 1.46. kg/d for control and Co-P treatments, respectively. Milk fat percentage and energy-corrected milk did not differ between treatments, averaging 4.33 ± 0.14% and 34.1. kg/d, respectively. Milk protein was significantly decreased by the Co-P treatment (3.56 and 3.41 ± 0.08% for control and Co-P treatments), but protein yield was not affected. Milk energies were 1.40 Mcal/d greater with Co-P. Energy lost as methane was reduced by 0.31 Mcal/d with the addition of RFDDGS to the diet. Heat loss averaged 29.9. ±. 0.55 Mcal/d and was not different between diets. Average energy retained as tissue energy was -2.99. ±. 0.93 Mcal/d and did not differ between treatments. Intake of digestible and metabolizable energy were not different between the control and Co-P treatments, averaging 2.68 and 2.31 Mcal/kg of DM, respectively. The net energy of lactation values of control and Co-P diets were calculated to be 1.43 and 1.47 Mcal/kg of DM, respectively. These energy estimates suggest greater energy content of diets containing RFDDGS than diets containing a mixture of corn and soybean meal in lactating dairy cows.
AB - Eight Holstein and 8 Jersey multiparous, lactating cows were used to complete 56 energy balances to determine the energy content of reduced-fat dried distillers grains with solubles (RFDDGS). A repeated switchback design was used to compare treatments with and without RFDDGS. Diets consisted of 24.2% corn silage, 18.4% alfalfa hay, 6.94% brome hay with either 22.9% rolled corn or 14.8% soybean meal (control), or 8.95% rolled corn, 28.8% RFDDGS, and 0% soybean meal [Co-P; dry-matter (DM) basis]. The inclusion of RFDDGS did not affect DM intake, averaging 21.4 ± 0.53. kg of DM for all cows, but milk production tended to increase from 29.8 to 30.9 ± 1.46. kg/d for control and Co-P treatments, respectively. Milk fat percentage and energy-corrected milk did not differ between treatments, averaging 4.33 ± 0.14% and 34.1. kg/d, respectively. Milk protein was significantly decreased by the Co-P treatment (3.56 and 3.41 ± 0.08% for control and Co-P treatments), but protein yield was not affected. Milk energies were 1.40 Mcal/d greater with Co-P. Energy lost as methane was reduced by 0.31 Mcal/d with the addition of RFDDGS to the diet. Heat loss averaged 29.9. ±. 0.55 Mcal/d and was not different between diets. Average energy retained as tissue energy was -2.99. ±. 0.93 Mcal/d and did not differ between treatments. Intake of digestible and metabolizable energy were not different between the control and Co-P treatments, averaging 2.68 and 2.31 Mcal/kg of DM, respectively. The net energy of lactation values of control and Co-P diets were calculated to be 1.43 and 1.47 Mcal/kg of DM, respectively. These energy estimates suggest greater energy content of diets containing RFDDGS than diets containing a mixture of corn and soybean meal in lactating dairy cows.
KW - Dairy cow
KW - Energy balance
KW - Indirect calorimetry
KW - Reduced-fat dried distillers grains with solubles
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U2 - 10.3168/jds.2014-9226
DO - 10.3168/jds.2014-9226
M3 - Article
C2 - 26233444
AN - SCOPUS:84942553663
SN - 0022-0302
VL - 98
SP - 7142
EP - 7152
JO - Journal of Dairy Science
JF - Journal of Dairy Science
IS - 10
M1 - 73843
ER -