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Association of calcium and energy balance metabolites in the first 3 days after parturition with disease and production outcomes in multiparous Jersey cows.

P. R. Menta

Events

06-22-2020

Abstract:

43
Association of calcium and energy balance metabolites in the first 3 days after parturition with disease and production outcomes in multiparous Jersey cows.
P. R. Menta*1, L. Fernandes1, D. Poit1, M. Celestino1, V. S. Machado1, M. A. Ballou1, R. C. Neves1,2. 1Department of Veterinary Sciences, College of Agricultural Sciences and Natural Resources, Texas Tech University Lubbock, TX, 2Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University West Lafayette, IN.

Our objectives were to understand the associations of total Ca concentration (tCa) measured at 1 through 3 DIM, and free fatty acids (FFA), BHB and glucose (GLU) measured at DIM 3 with (1) the risk of multiparous Jersey cows being diagnosed with early-lactation diseases and culling using multivariable Poisson regression; (2) milk production in the first 9 wk of lactation using generalized linear mixed models; and, (3) the risk of pregnancy in the first 150 DIM using Cox Proportional hazards modeling. A total of 380 cows were enrolled in a cohort study from one herd in West TX. Total Ca measured at DIM 1 through 3 was not associated with the risk of metritis. Cows with increased FFA and BHB had a higher risk to be diagnosed with metritis (P = 0.05) and clinical mastitis (P = 0.04), respectively. Increased concentrations of GLU (P = 0.007), FFA (P = 0.04), and tCa (P = 0.004) at 3 DIM were associated with the risk of culling. Reduced tCa at both DIM 1 (≤1.84 mmol/L; P < 0.0001; +3.85 kg per d) and 2 (≤1.88 mmol/L; P = 0.03; +1.84 kg per d) were associated with increased milk production across the first 9 wk of lactation compared with herdmates with increased tCa. Total Ca was not associated with milk production at DIM 3, with FFA (≥0.55 mmol/L; P = 0.02) and GLU (≤2.95 mmol/L; P = 0.002) being associated with increased milk production. None of the metabolites measured were associated with the risk of pregnancy in the first 150 DIM. Our results demonstrate that reduced tCa concentrations in the first 2 DIM and reduced GLU at 3 DIM are associated with increased milk production. Increased concentrations of FFA were associated with higher milk production but with increased risk of metritis.

Keywords: calcium, energy balance, milk production.

Biography: Paulo Menta received his Veterinary Medicine Degree at University of Passo Fundo, Brazil. He is currently pursuing his Master's degree at the Department of Veterinary Science at Texas Tech University. His field of study is mineral and energy metabolism in dairy cattle.