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Journal of Animal Science Abstract - Integrated Animal Science

Effects of supplementing calcium salts of polyunsaturated fatty acids to late-gestating beef cows on performance and physiological responses of the offspring1

 

This article in JAS

  1. Vol. 95 No. 12, p. 5347-5357
     
    Received: Apr 03, 2017
    Accepted: Oct 06, 2017
    Published: November 28, 2017


    2 Corresponding author(s): reinaldocooke@tamu.edu
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doi:10.2527/jas2017.1606
  1. R. S. Marques*,
  2. R. F. Cooke 2*34,
  3. M. C. Rodrigues*†,
  4. A. P. Brandão*†,
  5. K. M. Schubach*,
  6. K. D. Lippolis*,
  7. P. Moriel,
  8. G. A. Perry§,
  9. A. Lock# and
  10. D. W. Bohnert*
  1. * Oregon State University – Eastern Oregon Agricultural Research Center, Burns 97720
     UNESP – Faculdade de Medicina Veterinária e Zootecnia, Botucatu/SP 18168-000, Brazil
     University of Florida – Range Cattle Research and Education Center, Ona 33865
    § South Dakota State University – Department of Animal Science, Brookings 57007
    # Michigan State University – Department of Animal Science, East Lansing 48824

Abstract

This experiment compared performance and physiological responses of the offspring from cows supplemented with Ca salts of PUFA or SFA + MUFA during late gestation. Ninety-six multiparous, nonlactating, pregnant Angus × Hereford cows were ranked by BW, BCS, and age and divided into 24 groups of 4 cows/group at the end of their second trimester of gestation (d −7). Cows conceived during the same estrus synchronization + AI protocol, with semen from a single sire; hence, gestation length was 195 d for all cows at the beginning of the experiment (d 0). Groups were randomly assigned to receive (DM basis) 405 g/cow daily of soybean meal in addition to 1) 190 g/cow daily of Ca salts of PUFA based on eicosapentaenoic, docosahexaenoic, and linoleic acids or 2) 190 g/cow daily of Ca salts of SFA + MUFA based on palmitic and oleic acids (CON). Groups were maintained in 2 pastures (6 groups of each treatment/pasture) and received daily 10.1 kg/cow (DM basis) of grass–alfalfa hay. Groups were segregated into 1 of 12 drylot pens (6 by 18 m) and individually offered treatments 3 times/wk from d 0 until calving. Cow BW and BCS were recorded, and blood samples were collected on d −7 of the experiment and also within 12 h after calving. Calf BW was also recorded within 12 h of calving. Calves were weaned on d 280 of the experiment, preconditioned for 45 d (d 280 to 325), transferred to a growing lot on d 325, and moved to a finishing lot on d 445, where they remained until slaughter. At calving, PUFA-supplemented cows had a greater (P < 0.01) proportion (as % of total plasma fatty acids) of PUFA, including linoleic, linolenic, arachidonic, docosapentaenoic, and docosahexaenoic acids. At weaning, calves from CON-supplemented cows were older (P = 0.03), although no treatment differences were detected (P = 0.82) for calf weaning BW. During both growing and finishing phases, ADG was greater (P ≤ 0.06) in calves from PUFA-supplemented cows. Upon slaughter, HCW and marbling were also greater (P ≤ 0.05) in calves from PUFA-supplemented cows. Collectively, these results indicate that supplementing eicosapentaenoic, docosahexaenoic, and linoleic acids to late-gestating beef cows stimulated programming effects on postnatal offspring growth and carcass quality. Therefore, supplementing late-gestating beef cows with Ca salts of PUFA appears to optimize offspring productivity in beef production systems.

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