Supplementing Fat to the Cow Herd Bret W.

Supplementing Fat to the Cow Herd Bret W.

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

Fatsupplemented (P = 0.47) Prepartum comparison (P = 0.25) UW 90 Detection of Estrus 75 84.5 60

129 Cows 81.6 212 Cows 45 % 30 15 0 Control Fat Prepartum (P = 0.49) UW 75

50 Detection of Estrus 69.7 73.4 99 Cows 143 Cows Control Fat Postpartum % 25 0 (P = 0.53)

UW First Service Conception Rates 75 60 45 % 30 64.3 67.0 140 Cows 194 Cows Control

Fat Prepartum 15 0 (P = 0.60) UW First Service Conception Rates 75 60 45 % 30 65.1 58.4 146 Cows

173 Cows 15 0 Control Fat Postpartum (P = 0.22) UW First Service Conception Rates Literature 75 73.7 60 70.0

45 % 30 110 Cows 114 Cows Control Fat Postpartum 15 0 (P = 0.54) UW First Service Conception Rates Burns et al. (2002)

80 76.0 60 62.0 40 % 42 Cows 42 Cows 20 0 Control (P = 0.12) Fat Postpartum ~56 g/day

UW First Service Conception Rates UW Cows 60 50 40 50.0 30 % 36 Cows 59 Cows 28.8

20 10 0 Control Fat Postpartum (P = 0.04) UW UW Study Design BCS 4.2 0.3 CON LIN OLE ~420 g fat/day BCS 6.0

0.3 CON LIN OLE ~420 g fat/day Lake et al. (2003) UW Doudenal Flow of Linoleic Acid 30 27.8 (P < 0.001) 20 g/d 10 9.7

8.4 Control Oleate 0 Scholljegerdes et al. (2001) Linoleate UW COOH CH3 Linoleic Acid Desaturases and Elongases COX

COOH Arachidonic Acid CH3 OH COOH PGF2 CH3 OH OH Prostaglandin dehydrogenase and 13-reductasereductase OH COOH PGFM CH3 OH O

UW Serum PGFM in Cows 800 700 (P = 0.01) 600 500 pg/mL 400 647 452 371 300 200

Control Oleate Grant et al. (2002) Linoleate UW Overall Pregnancy Rates 100 80 60 % 40 84.5 84.2

219 Cows 247 Cows Control Fat Postpartum 20 0 (P = 0.94) UW 100 80 60 % 40

Overall Pregnancy Rates 91.8 86.3 197 Cows 281 Cows Control Fat Prepartum 20 0 (P = 0.05) UW Plasma 18:2 of Cows Fed

Lipids Prepartum Alexander et al. (2002) UW 100 80 60 % 40 Overall Pregnancy Rates UW Herd 97.4 97.3 79 Cows

76 Cows Control Fat Prepartum 20 0 (P = 0.96) UW Calf Responses to Cows Diet UW Birth Weights 90 75

60 76.3 76.8 Control Fat Prepartum 45 pounds 30 15 0 (P = 0.84) UW

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,

Ben Garrett, and Rick Landeis UW THANK YOU UW

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