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 - 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 -