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Relation among body condition score, serum urea nitrogen and cholesterol concentrations, and reproductive performance in high-producing Holstein dairy cows in early lactation.
1992
Ruegg P.L. | Goodger W.J. | Holmberg C.A. | Weaver L.D. | Huffman E.M.
Body condition scoring (using a 5-point with quarter-point divisions) was performed on 66 Holstein dairy cows that began their second or later lactation in August, September, or October 1988. Cows' body condition was scored beginning on postpartum day 4 (+/- 1) and subsequently at postpartum days (+/- 1) 18, 32, 46, 60, 73 and 87. Blood samples were obtained on the same dates. Reproductive health examinations were conducted by 1 of 2 veterinarians beginning at postpartum day 21. Reproductive performance was evaluated in relation to body condition score and serum urea nitrogen and cholesterol concentrations. Number of days to first recorded signs of estrus and first breeding were not related to body condition score at calving, amount of condition loss, cumulative 80-day milk yield, or 305-day fat corrected milk yield. Cows that calved with body condition score greater than or equal to 3.50 required more days to conceive. Cows losing > 0.75 points of condition had longer days of conception. Body condition score at calving and amount of condition lost were not related to services per conception or diagnosis of follicular cyst. Cumulative 80-day milk yield was not related to days to conception or services per conception. Cows that produced greater than or equal to the mean 305-day milk yield required more services and had longer days to conception than cows that produced < the mean 305-day milk yield. Cows with diagnosis of ovarian follicular cysts had greater cumulative 80- and 305-day milk yields than did cows that were not diagnosed with follicular cysts. Cows conceiving with less than or equal to 2 services did not differ in average daily milk production, body condition score, or serum urea nitrogen concentration from cows conceiving with > 2 services, but cows that conceived with less than or equal to 2 services had higher serum cholesterol values than did cows requiring more services.
Afficher plus [+] Moins [-]Laboratory cultivation of blue-green algae for use as a food for Lymnaeids, the intermediate host of Fasciola hepatica.
1992
Lee C.G. | Kim S.K. | Lee C.Y.
Spontaneous lingual papillomas in fischer 344 rats.
1992
Kang B.H. | Lim C.H.
Isolation and morphological characterization of natural killer cell in the Sprague-dawley (SD) rats.
1992
Kang K.S. | Lee Y.S.
Comparison of soluble antigens Leptospira interrogans serovars by SDS-PAGE, crossed immunoelectrophoresis and immunoblotting.
1992
Baik Y.O. | Mah J.S.
Ultrastructure of virus particles in the liver of piglets infected with porcine enterovirus serotype 3.
1992
Shin T.K | Lee C.S. | Huh M.D.
Reverse effects of electroacupuncture on xylazine analgesia in goats.
1992
Seo K.M. | Yoon J.H. | Cheong J.T. | Chang K.H. | Nam T.C.
Parthenogenetic development of mouse eggs-(1)-Parthenogenetic activation by ethanol and hyaluronidase treatments.
1992
Lee H.J. | Kang T.Y. | Choi M.C. | Ha D.S.
Effect of Artemisia Iwayomogi water extract on hepatic injury by carbon tetrachloride in rats - (1) - Effect of serum AST, ALT, LDH activities, lipid content and liver peroxide content.
1992
Kim K.S. | Park J.H.
Effect of bilateral stimulation on spinal evoked potentials in dogs Texte intégral
1992
Poncelet, Luc | Delauche, A. | Vinals, C. | Balligand, Marc
peer reviewed
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