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Effect of prepartum source and amount of vitamin D supplementation on lactation performance of dairy cows.
Poindexter, M B; Zimpel, R; Vieira-Neto, A; Husnain, A; Silva, A C M; Faccenda, A; Sanches de Avila, A; Celi, P; Cortinhas, C; Santos, J E P; Nelson, C D.
Afiliação
  • Poindexter MB; Animal Molecular and Cellular Biology Program, University of Florida, Gainesville 32611.
  • Zimpel R; Animal Molecular and Cellular Biology Program, University of Florida, Gainesville 32611.
  • Vieira-Neto A; Animal Molecular and Cellular Biology Program, University of Florida, Gainesville 32611.
  • Husnain A; Animal Molecular and Cellular Biology Program, University of Florida, Gainesville 32611.
  • Silva ACM; Department of Animal Sciences, University of Florida, Gainesville 32611.
  • Faccenda A; Department of Animal Sciences, University of Florida, Gainesville 32611; Department of Animal Science, State University of Western Parana, Marechal Candido Rondon, PR 85960-000, Brazil.
  • Sanches de Avila A; Department of Animal Sciences, University of Florida, Gainesville 32611; Department of Animal Science, State University of Western Parana, Marechal Candido Rondon, PR 85960-000, Brazil.
  • Celi P; DSM Nutritional Products, Columbia, MD 21045; Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville 3010, Australia.
  • Cortinhas C; DSM Nutritional Products, Columbia, MD 21045.
  • Santos JEP; Animal Molecular and Cellular Biology Program, University of Florida, Gainesville 32611; Department of Animal Sciences, University of Florida, Gainesville 32611.
  • Nelson CD; Animal Molecular and Cellular Biology Program, University of Florida, Gainesville 32611; Department of Animal Sciences, University of Florida, Gainesville 32611. Electronic address: cdnelson@ufl.edu.
J Dairy Sci ; 106(2): 974-989, 2023 Feb.
Article em En | MEDLINE | ID: mdl-36526464
ABSTRACT
The objectives of this experiment were to determine the effects of supplementing 25-hydroxyvitamin D3 (calcidiol, CAL) compared with vitamin D3 (cholecalciferol, CHOL) at 1 or 3 mg/d in late gestation on production outcomes of dairy cows. One hundred thirty-three parous and 44 nulliparous pregnant Holstein cows were enrolled in the experiment. Cows were blocked by parity and previous lactation milk yield (parous) or genetic merit (nulliparous) and assigned randomly to receive 1 or 3 mg/d of CAL or CHOL in a 2 × 2 factorial arrangement of treatments (CAL1, CAL3, CHOL1, and CHOL3). Treatments were provided to individual cows as a top-dress to the prepartum diet from 250 d in gestation until parturition. The prepartum diet had a dietary cation-anion difference of -128 mEq/kg of dry matter. Production and disease were evaluated for the first 42 d in milk, and reproduction was evaluated to 300 d in milk. Incidence of postpartum diseases did not differ among treatments. Feeding CAL compared with CHOL increased yields of colostrum and colostrum fat, protein, and total solids, resulting in an increased amount of net energy for lactation secreted as colostrum (CHOL = 7.0 vs. CAL = 9.0 ± 0.7 Mcal). An interaction between source and amount was observed for milk yield CAL3 increased milk yield compared with CHOL3 (CHOL3 = 34.1 vs. CAL3 = 38.7 ± 1.4 kg/d) but milk yield did not differ between CAL1 and CHOL1 (CHOL1 = 36.9 vs. CAL1 = 36.4 ± 1.4 kg/d). Concentrations of serum calcidiol on day of calving and average serum Ca from d 2 to 11 postpartum were positively associated with milk yield in the first 42 d in milk. Interactions between source and amount of vitamin D were also observed for pregnancy after first AI the percentage of cows receiving CHOL1 and CAL3 that became pregnant was smaller than that of cows receiving CHOL3 and CAL1. However, pregnancy per AI and pregnancy by 300 d in milk did not differ among treatments. Overall, CAL3 increased milk yield compared with CHOL3, whereas in cows fed 1 mg/d (CAL1 and CHOL1), the source of vitamin D generally had no effect. The effect of CAL3 may be explained in part by serum CAL concentrations and postpartum serum Ca, which were associated with milk yield.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Calcifediol / Suplementos Nutricionais Limite: Animals / Pregnancy Idioma: En Revista: J Dairy Sci Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Calcifediol / Suplementos Nutricionais Limite: Animals / Pregnancy Idioma: En Revista: J Dairy Sci Ano de publicação: 2023 Tipo de documento: Article