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Increased dietary protein in the second trimester of gestation increases live weight gain and carcass composition in weaner calves to 6 months of age

Miguel-Pacheco, G.G.; Curtain, L.D.; Rutland, Catrin S.; Knott, L.; Norman, S.T.; Phillips, N.J.; Perry, V.E.A.

Authors

G.G. Miguel-Pacheco

L.D. Curtain

Catrin S. Rutland

L. Knott

S.T. Norman

N.J. Phillips

V.E.A. Perry



Abstract

Genetically similar nulliparous Polled Hereford heifers from a closed pedigree herd were used to evaluate the effects of dietary protein during the first and second trimester of gestation upon fetal, placental and postnatal growth. Heifers were randomly allocated into two groups at 35d post AI (35dpc) to a single bull and fed High (15.7%CP) or Low (5.9%CP) protein in the first trimester (T1). At 90dpc, half of each nutritional treatment group changed to a High or Low protein diet for the second trimester until 180dpc (T2). High protein intake in the second trimester increased birthweight in females (P = 0.05) but there was no effect of treatment upon birthweight when taken over both sexes. Biparietal diameter was significantly increased by high protein in the second trimester with the effect being greater in the female (P = 0.02) but also significant overall (P = 0.05). Placental weight was positively correlated with birth weight, fibroblast volume, and relative blood vessel volume (P < 0.05). Placental fibroblast density was increased and trophoblast volume decreased in the high protein first trimester treatment group (P

Journal Article Type Article
Publication Date Jun 1, 2017
Journal Animal
Print ISSN 1751-7311
Electronic ISSN 1751-732X
Publisher Cambridge University Press (CUP)
Peer Reviewed Peer Reviewed
Volume 11
Issue 6
APA6 Citation Miguel-Pacheco, G., Curtain, L., Rutland, C. S., Knott, L., Norman, S., Phillips, N., & Perry, V. (2017). Increased dietary protein in the second trimester of gestation increases live weight gain and carcass composition in weaner calves to 6 months of age. animal, 11(6), https://doi.org/10.1017/S1751731116002330
DOI https://doi.org/10.1017/S1751731116002330
Keywords fetal programming; bovine; calf growth; gestation diet
Publisher URL https://www.cambridge.org/core/journals/animal/article/div-classtitleincreased-dietary-protein-in-the-second-trimester-of-gestation-increases-live-weight-gain-and-carcass-composition-in-weaner-calves-to-6-months-of-agediv/F074C0E360136AD81D19002AC29D86F7
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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