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Supplementing Fat to the Cow Herd

Supplementing Fat to the Cow Herd. Bret W. Hess Beef Cattle Nutritionist. Levels of Consideration. Reproductive diseases and conditions cost. $441,000,000 to $502,000,000 /year. Animal Factors Affecting Profitability. (Bellows et al., 2002). The Beef Cow’s Annual Life Cycle.

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Supplementing Fat to the Cow Herd

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  1. Supplementing Fat to the Cow Herd Bret W. Hess Beef Cattle Nutritionist

  2. Levels of Consideration

  3. Reproductive diseases and conditions cost $441,000,000 to $502,000,000/year Animal Factors Affecting Profitability (Bellows et al., 2002)

  4. The Beef Cow’s Annual Life Cycle Time to rebreed (~20 days) 1st 30% of lactation 60 days 1st 85% of pregnancy Last 15% of pregnancy 40 days 245 days

  5. Supplemental Fat ThroughoutThe Beef Cow’s Lifecycle • Postpartum Cows • Prepartum Cows • Neonatal/Suckling Calves

  6. Review of the Cow’s Estrous Cycle

  7. Positive Responses to Supplemental Fat Enhanced ovarian follicular growth and function Increased growth and development of cells destine to form the corpus luteum

  8. Postpartum Interval (P = 0.47) (P = 0.25)

  9. Detection of Estrus 129 Cows 212 Cows (P= 0.49)

  10. Detection of Estrus 143 Cows 99 Cows (P= 0.53)

  11. First Service Conception Rates 194 Cows 140 Cows (P= 0.60)

  12. First Service Conception Rates 146 Cows 173 Cows (P= 0.22)

  13. First Service Conception RatesLiterature 114 Cows 110 Cows (P= 0.54)

  14. First Service Conception Rates Burns et al. (2002) 42 Cows 42 Cows (P= 0.12) ~56 g/day

  15. First Service Conception Rates UW Cows 59 Cows 36 Cows (P= 0.04)

  16. CON CON LIN LIN OLE OLE UW Study Design BCS 4.2  0.3 BCS 6.0  0.3 ~420 g fat/day ~420 g fat/day Lake et al. (2003)

  17. Doudenal Flow of Linoleic Acid (P < 0.001) Scholljegerdes et al. (2001)

  18. C O O H H3 Linoleic Acid C Desaturases and Elongases C O Arachidonic Acid O H H3 C OH COX COOH CH3 PGF2 OH OH Prostaglandin dehydrogenase and 13-reductase OH COOH PGFM CH3 OH O

  19. Serum PGFM in Cows (P = 0.01) Grant et al. (2002)

  20. Overall Pregnancy Rates 219 Cows 247 Cows (P= 0.94)

  21. Overall Pregnancy Rates 281 Cows 197 Cows (P= 0.05)

  22. Plasma 18:2 of Cows Fed Lipids Prepartum Alexander et al. (2002)

  23. Overall Pregnancy RatesUW Herd 79 Cows 76 Cows (P= 0.96)

  24. Calf Responses to Cow’s Diet

  25. Birth Weights (P= 0.84)

  26. Newborn Calves Exposed to 0°C (P< 0.01) Lammoglia et al. (1999)

  27. Vigor Scores of Newborn Calves (P= 0.48)

  28. Immune Response of Calves (P< 0.05) Small et al.

  29. Plasma Linoleic Acid of Newborn Calves (P< 0.05) Small et al.

  30. Relationship Between Milk 18:2 and Calf Adipose Tissue 18:2 Lake et al. (2003)

  31. Summary of Responsesfor Cows Fed Fat Postpartum • Increases Ovarian Follicular Growth and Development • Enhances Luteal Activity • Does NOT Affect Postpartum Interval • May Reduce First Service Conception Rates • Does NOT Improve Reproduction

  32. Summary of Responsesfor Cows Fed Fat Prepartum • Does NOT Appear to Affect Postpartum Interval • Does NOT Appear to Affect First Service Conception Rates • May Improve Overall Pregnancy Rates • Increases the Cow’s Linoleic Acid Status

  33. Summary of Responsesfor Cows Fed Fat Prepartum • Does NOT Appear to Affect Calf Birth Weight • May Increase the Calf’s Cold Tolerance • May Bolster the Calf’s Immune Response • Improves the Calf’s Linoleic Acid Status

  34. Acknowledgments Sponsors:USDA-NRICGP, ADM, and UW Collaborators: Dan Rule, Doug Hixon, Gary Moss, Paul Ludden, Steve Paisley, Lee Beldon, Dennis Hallford, Rick Funston, Danny Simms, and Steve Bartle Research Associates: Venerand Nayigihugu, Brenda Alexander, Chuck Murrieta, Lisa Balstad, and Ed Van Kirk Graduate Students: Eric Scholljegerdes, Scott Lake, Wade Small, Becky Atkinson, Mark Grant, Bridget Johnson, Lisa Brokaw, Jeff Bottger, Jared Gould, Ben Garrett, and Rick Landeis

  35. THANK YOU

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