Supplementing Fat to the Cow Herd Bret W. Hess Beef Cattle Nutritionist UW Levels of Consideration UW Animal Factors Affecting Profitability Reproductive diseases and conditions cost $441,000,000 to $502,000,000/year 500 Others Dystocia
Infertility 249.4 400 300 $ 200 Million 185.4 100 0 66.7 Lost Income (Bellows et al., 2002) UW
The Beef Cows Annual Life Cycle Time to rebreed (~20 days) 1st 30% of lactation 60 days Last 15% of pregnancy 40 days 1st 85% of pregnancy 245 days UW
Supplemental Fat Throughout The Beef Cows Lifecycle Postpartum Cows Prepartum Cows Neonatal/Suckling Calves UW Review of the Cows Estrous Cycle UW Positive Responses to Supplemental Fat Enhanced ovarian follicular growth and function Increased growth and development
of cells destine to form the corpus luteum UW Postpartum Interval 75 75 74 50 66 days 25 0 Control
Newborn Calves Exposed to 0C 39.6 C o (P < 0.01) 39.4 39.4 39.2 Rectal temperature, 39.1 39.0 Control Fat supplemented Lammoglia et al. (1999) UW
Vigor Scores of Newborn Calves 1.5 1 1.2 1.1 0.5 vigor score 0 Control Fat supplemented (P = 0.48) UW
Immune Response of Calves 0.1 (P < 0.05) 0.09 0.05 0.06 absorbance 0 Control Small et al. Fat Supplemented UW
2 Plasma Linoleic Acid of Newborn Calves (P < 0.05) 1.5 1 1.3 1.1 0.5 mg/g of dry plasma 0 Control Small et al.
Fat Supplemented UW Relationship Between Milk 18:2 and Calf Adipose Tissue 18:2 16 r = 0.69; P < 0.0001 14 12 10 8 6 4 Calf
2 (mg FA/ g tissue) 0 0 5 10 Milk (g FA/ 24 h) Lake et al. (2003) 15 20 UW Summary of Responses for 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 UW Summary of Responses for 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 Cows Linoleic Acid Status UW Summary of Responses for Cows Fed Fat Prepartum
Does NOT Appear to Affect Calf Birth Weight May Increase the Calfs Cold Tolerance May Bolster the Calfs Immune Response Improves the Calfs Linoleic Acid Status UW Acknowledgments Sponsors: USDA-reductaseNRICGP, 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,
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