Energy content of reduced-fat dried distillers grains with solubles for lactating dairy cows

A. J. Foth, T. Brown-Brandl, K. J. Hanford, P. S. Miller, G. Garcia Gomez, P. J. Kononoff

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number73843
Pages (from-to)7142-7152
Number of pages11
JournalJournal of Dairy Science
Volume98
Issue number10
DOIs
StatePublished - Oct 1 2015

Keywords

  • Dairy cow
  • Energy balance
  • Indirect calorimetry
  • Reduced-fat dried distillers grains with solubles

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

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    Foth, A. J., Brown-Brandl, T., Hanford, K. J., Miller, P. S., Garcia Gomez, G., & Kononoff, P. J. (2015). Energy content of reduced-fat dried distillers grains with solubles for lactating dairy cows. Journal of Dairy Science, 98(10), 7142-7152. [73843]. https://doi.org/10.3168/jds.2014-9226