Association of changes among body condition score during the transition period with NEFA and BHBA concentrations, milk production, fertility, and health of Holstein cows.

Autor: Barletta RV; Department of Dairy Science, University of Wisconsin-Madison, Madison, 53706, USA. Electronic address: barletarafael@yahoo.com.br., Maturana Filho M; Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, 13635-900, Brazil., Carvalho PD; Department of Dairy Science, University of Wisconsin-Madison, Madison, 53706, USA., Del Valle TA; Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, 13635-900, Brazil., Netto AS; Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, 13635-900, Brazil., Rennó FP; Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, 13635-900, Brazil., Mingoti RD; Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, 13635-900, Brazil., Gandra JR; College of Agricultural Science, Federal University of Dourados, Dourados, 79804-970, Brazil., Mourão GB; Department of Animal Science, University of São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, 13418-900, Brazil., Fricke PM; Department of Dairy Science, University of Wisconsin-Madison, Madison, 53706, USA., Sartori R; Department of Animal Science, University of São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, 13418-900, Brazil., Madureira EH; Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, 13635-900, Brazil., Wiltbank MC; Department of Dairy Science, University of Wisconsin-Madison, Madison, 53706, USA.
Jazyk: angličtina
Zdroj: Theriogenology [Theriogenology] 2017 Dec; Vol. 104, pp. 30-36. Date of Electronic Publication: 2017 Jul 27.
DOI: 10.1016/j.theriogenology.2017.07.030
Abstrakt: Our objective was to evaluate the association between body condition score (BCS) change during the transition period with fertility, non-esterified fatty acids (NEFA) and beta-hydroxybutyrate (BHBA) concentrations, milk yield, and health problems of Holstein cows in a retrospective cohort study. Holstein cows (n = 232) were assessed for BCS (5 point scale; 0.25 point increments) and had blood collected at 21 and 7 d before, on the day of, and 7 and 21 d after calving. Blood samples were assayed for NEFA and BHBA concentrations. All cows received a timed artificial insemination (TAI) at 65 ± 3 days in milk (DIM) following a Presynch-Ovsynch protocol with a progesterone implant during the Ovsynch protocol. Cows were grouped based on BCS change after calving as to whether they: 1) lost (L), 2) maintained (M), or 3) gained (G) BCS. Data were analyzed by logistic regression with GLIMMIX and ANOVA with repeated measures using the MIXED procedures of SAS. Both NEFA and BHBA concentrations after calving differed (P < 0.01) for cows that lost, maintained, or gained BCS from 21 d before to 21 d after calving (NEFA: 0.51 ± 0.01; 0.45 ± 0.01; 0.42 ± 0.01 mmol/L; BHBA: 0.73 ± 0.02; 0.70 ± 0.02; 0.68 ± 0.02 mmol/L; respectively; mean ± SEM). By design, BCS change after calving differed (P < 0.01) among groups and was -0.38; 0.00; and 0.35 for cows in groups L, M, and G, respectively. At 21 d before and 21 d after calving, BCS differed (P < 0.01) among groups and was [before (2.97, 2.70, and 2.57) and after (2.54, 2.70, and 2.90)] for cows in groups L, M, and G, respectively. Between evaluated days, higher circulating NEFA and BHBA concentrations were observed 7 d after calving. Change in BCS affected (P < 0.01) pregnancy/AI (P/AI), days to first ovulation, and percentage of cyclic cows at 50 DIM. At 32 d after TAI, P/AI differed (P < 0.01) for cows that lost [18% (11/84)], maintained [33% (26/80)], or gained [47% (32/68)] BCS. Cows that lost BCS during the transition period had more health events (P < 0.01), than cows that gained or maintained BCS. In conclusion, changes in BCS during the transition period affected NEFA and BHBA concentrations, fertility, and occurrence of health problems during the lactation.
(Copyright © 2017 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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