Fat supplementation influences postpartum reproductive performance in Brahman cows

Journal of Animal Science
C A De FriesR D Randel

Abstract

Multiparous Brahman cows (n = 40) in excellent body condition (6.5+/-.1) were randomly assigned to receive either 5.2 (rice bran) or 3.7% (control) dietary fat after calving. The experimental diets were formulated to be isocaloric and isonitrogenous. The experimental diets were fed twice daily from d 1 after calving through the first normal estrous cycle. Cows were weighed, scored for body condition, and bled at weekly intervals from d 1 through 50 after calving. Weekly bleedings continued until the first detectable estrus. Blood samples were collected daily throughout the first normal estrous cycle. All cows were exposed to a fertile bull at the estrus following the first normal estrous cycle and for a 60-d breeding season. Ovarian follicular populations were recorded weekly by transrectal ultrasonography from d 15 to 50 after calving. Calf weights were recorded at 14-d intervals from d 1 to 43 after birth and at weaning (205 d). Cows receiving rice bran gained more body condition (P < .05) than cows receiving the control supplement. The numbers of small (< 4.0 mm, P < .05), medium (4.0 to 7.9 mm, P < .05) and total follicles (P < .05) were greater in the rice bran than in the control group from 15 to 29 d after calving, and l...Continue Reading

Citations

Jul 15, 2007·Pakistan Journal of Biological Sciences : PJBS·S M GhoreishiH Hejazi
Jul 25, 2008·Reproduction in Domestic Animals = Zuchthygiene·J E P SantosF T Silvestre
Oct 11, 2020·Animals : an Open Access Journal From MDPI·Jessie E TiptonNathan M Long
Sep 16, 2000·Theriogenology·Y Yavas, J S Walton

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