Associations between days on close-up diets and immune responses prepartum, metabolites peripartum, and risk of postpartum diseases in Jersey cows

Nutritional strategies during the final weeks prepartum, close-up period, aim to reduce immune suppression and metabolic imbalances. This paper reports results of 2 observational studies. Data from previous experiments (study 1) were used investigate associations between days fed diets (DINCUD) uterine diseases (n = 1,230). In study 2, retrospective data animals not in 1 11,962) DINCUD removal herd long-term reproductive productive responses. Nulliparous (lactation 0) parous ≥1) cows moved pens 28 d before expected calving date, but only rations with negative dietary cation-anion difference. 1, personnel diagnosed retained fetal membranes, metritis, acute metritis postpartum. Length period was tested for its linear quadratic effects. The β-coefficients multivariable analyses calculate predicted outcome each cow. addition, mean (±SEM) <10, ± 3, 42 3 are reported. Metritis associated interaction parity-diet (nulliparous: <10 31.8 9.2, 21.8 0.7, 29.8 2.1%; parous: 81.7 2.9, 11.1 0.3, 14.8 1.3%). total energy-corrected milk yield ≤10 7.91 0.03, 8.17 0.01, 8.15 0.01 kg × 103; 7.99 0.05, 9.79 9.52 0.03 103) percentage pregnant by 305 (DIM; nulliparous: 80.4 0.4, 83.3 0.1, 82.8 0.2%; 59.5 78.3 73.1 0.5%). Furthermore, DIM 27.0 0.5, 20.7 0.1%; 45.1 31.1 28.1 0.3%). Jersey that managed achieve may have reduced odds improved performances.