Effect of Added Dietary Fat and Bovine Somatotropin on the Performance and Metabolism of Lactating Dairy Cows

D. S. Lough, L. D. Muller, R. S. Kensinger, T. F. Sweeney, Lester C. Griel, Jr.

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Four early lactation Holstein cows (44 to 105 d postpartum) were used in a 4 × 4 Latin square experiment in a 2 × 2 factorial arrangement of treatments to study effects of added dietary fat and/or bovine somatotropin on performance and metabolism. Treatments were: 1) control diet plus placebo injection; 2) 5% added dietary fat (hydrolyzed blend of animal and vegetable fat) + placebo injection; 3) control diet + 50 IU bovine somatotropin/d; and 4) 5% added dietary fat + 50 IU bovine somatotropin/d. Dietary fat reduced dry matter intake (21.6 vs. 22.7 kg/d) and elevated plasma triglycerides (34.7 vs. 29.2 mg/100 ml). Injection of somatotropin lowered blood urea nitrogen, increased plasma free fatty acids, and increased plasma somatotropin. Milk production, milk fat percent, and 4% FCM production were increased by the injection of somatotropin. Milk protein percent was decreased (3.30 vs. 3.44%) with added fat and tended to be lower with somatotropin. The percentage of short-chain fatty acids (C6 to C14) in milk fat decreased with added fat while the percentage of stearic and oleic acids in milk fat increased. Production responses for fat plus somatotropin and somatotropin treatments were similar. Under the conditions of this study, the addition of dietary fat with injection of somatotropin had little effect on production parameters compared with that found with somatotropin alone.

Original languageEnglish (US)
Pages (from-to)1161-1169
Number of pages9
JournalJournal of dairy science
Volume71
Issue number5
DOIs
StatePublished - Jan 1 1988

Fingerprint

Dietary Fats
dietary fat
somatotropin
Growth Hormone
dairy cows
Fats
metabolism
Milk
Injections
injection
milk fat
Placebos
Stearic Acids
Diet
placebos
bovine growth hormone
Volatile Fatty Acids
Milk Proteins
lipids
Blood Urea Nitrogen

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Lough, D. S. ; Muller, L. D. ; Kensinger, R. S. ; Sweeney, T. F. ; Griel, Jr., Lester C. / Effect of Added Dietary Fat and Bovine Somatotropin on the Performance and Metabolism of Lactating Dairy Cows. In: Journal of dairy science. 1988 ; Vol. 71, No. 5. pp. 1161-1169.
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Effect of Added Dietary Fat and Bovine Somatotropin on the Performance and Metabolism of Lactating Dairy Cows. / Lough, D. S.; Muller, L. D.; Kensinger, R. S.; Sweeney, T. F.; Griel, Jr., Lester C.

In: Journal of dairy science, Vol. 71, No. 5, 01.01.1988, p. 1161-1169.

Research output: Contribution to journalArticle

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