Nonstructural Carbohydrate and Protein Effects on Rumen Fermentation, Nutrient Flow, and Performance of Dairy Cows

J. M. Aldrich, L. D. Muller, G. A. Varga, Lester C. Griel, Jr.

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

Four multiparous Holstein cows fitted with rumen and duodenal cannulas were used in a 4 × 4 Latin square with 20-d periods. Four diets were formulated for high and low rumen availabilities of nonstructural carbohydrate and protein. Cows were milked and fed three times daily. Milk production averaged 39 kg/d and was unaffected by treatment. Dry matter intake and 4% FCM production were increased by 1 kg/d for cows fed the low rumen-available nonstructural carbohydrate diets. Milk protein percentage was elevated when either the high rumen-available nonstructural carbohydrate or high rumen-available protein diets were fed. Low rumen-available protein diets increased duodenal passage of total essential AA but did not increase passage of Arg, Ile, and Met. Passage of bacterial N was highest (262 g/d) when high rumen-available nonstructural carbohydrate was combined with high rumen-available protein and was lowest when high rumen-available nonstructural carbohydrate was combined with low rumen-available protein (214 g/d). Diets with low rumen availabilities of protein were not advantageous, possibly because duodenal passage of one or more of the limiting AA was not increased. Passage of bacterial N to the duodenum was highest when rumen availabilities of both nonstructural carbohydrate and protein were high.

Original languageEnglish (US)
Pages (from-to)1091-1105
Number of pages15
JournalJournal of dairy science
Volume76
Issue number4
DOIs
StatePublished - Jan 1 1993

Fingerprint

Rumen
rumen fermentation
Fermentation
rumen
dairy cows
Carbohydrates
carbohydrates
Food
nutrients
Proteins
proteins
Diet
cows
dietary protein
diet
milk protein percentage
Milk Proteins
cannulas
duodenum
Duodenum

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Aldrich, J. M. ; Muller, L. D. ; Varga, G. A. ; Griel, Jr., Lester C. / Nonstructural Carbohydrate and Protein Effects on Rumen Fermentation, Nutrient Flow, and Performance of Dairy Cows. In: Journal of dairy science. 1993 ; Vol. 76, No. 4. pp. 1091-1105.
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Nonstructural Carbohydrate and Protein Effects on Rumen Fermentation, Nutrient Flow, and Performance of Dairy Cows. / Aldrich, J. M.; Muller, L. D.; Varga, G. A.; Griel, Jr., Lester C.

In: Journal of dairy science, Vol. 76, No. 4, 01.01.1993, p. 1091-1105.

Research output: Contribution to journalArticle

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