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Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle.

Publication ,  Journal Article
Carroll, DJ; Jerred, MJ; Grummer, RR; Combs, DK; Pierson, RA; Hauser, ER
Published in: J Dairy Sci
October 1990

Forty-six multiparous Holstein cows were assigned at 5 d postpartum to a completely randomized design employing a 2 x 3 factorial arrangement of treatments. Factors were 0 and 5% added prilled long-chain fatty acids (DM basis) and three forage to concentrate ratios (45:55, 64:36, 84:16). Diets consisted of immature alfalfa silage and a concentrate of shelled corn and soybean meal with or without fat replacing a portion of the corn. Mean plasma concentration of cholesterol was higher for cows fed 5% vs. 0% fat and increased over the first 100 d in milk for all animals regardless of treatment. There were no differences in reproductive performance due to either of the main effects. Mean plasma progesterone was higher due to fat treatment in the mid to late luteal phase of the second postpartum cycle as well as the metestrous to early luteal phase and mid to late luteal phase of the third cycle. Even though progesterone concentrations were higher in cows fed 5% fat during the luteal phase after breeding, the conception rates at this service were not different from those fed 0% fat. The biological significance of increased plasma progesterone concentration was not identified with any postpartum reproductive trait measured in this trial.

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Published In

J Dairy Sci

DOI

ISSN

0022-0302

Publication Date

October 1990

Volume

73

Issue

10

Start / End Page

2855 / 2863

Location

United States

Related Subject Headings

  • Reproduction
  • Progesterone
  • Pregnancy Complications
  • Pregnancy
  • Lactation
  • Fertilization
  • Female
  • Estrus
  • Energy Metabolism
  • Dietary Fats
 

Citation

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MLA
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Carroll, D. J., Jerred, M. J., Grummer, R. R., Combs, D. K., Pierson, R. A., & Hauser, E. R. (1990). Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle. J Dairy Sci, 73(10), 2855–2863. https://doi.org/10.3168/jds.S0022-0302(90)78973-4
Carroll, D. J., M. J. Jerred, R. R. Grummer, D. K. Combs, R. A. Pierson, and E. R. Hauser. “Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle.J Dairy Sci 73, no. 10 (October 1990): 2855–63. https://doi.org/10.3168/jds.S0022-0302(90)78973-4.
Carroll DJ, Jerred MJ, Grummer RR, Combs DK, Pierson RA, Hauser ER. Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle. J Dairy Sci. 1990 Oct;73(10):2855–63.
Carroll, D. J., et al. “Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle.J Dairy Sci, vol. 73, no. 10, Oct. 1990, pp. 2855–63. Pubmed, doi:10.3168/jds.S0022-0302(90)78973-4.
Carroll DJ, Jerred MJ, Grummer RR, Combs DK, Pierson RA, Hauser ER. Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle. J Dairy Sci. 1990 Oct;73(10):2855–2863.
Journal cover image

Published In

J Dairy Sci

DOI

ISSN

0022-0302

Publication Date

October 1990

Volume

73

Issue

10

Start / End Page

2855 / 2863

Location

United States

Related Subject Headings

  • Reproduction
  • Progesterone
  • Pregnancy Complications
  • Pregnancy
  • Lactation
  • Fertilization
  • Female
  • Estrus
  • Energy Metabolism
  • Dietary Fats