Author/Authors :
Gandra, Jefferson R. Instituto de Estudo em Desenvolvimento Agrário e Regional - Universidade Federal do Sul e Sudeste do Pará, Marabá PA, Brazil , Dell Vale, Tiago A. Faculdade de Agronomia - Universidade Federal do Pampa - campus Itaqui RS, Brazil , Takiya, Caio S. Department of Animal Sciences and Industry - Kansas State University, Manhattan, United States , Oliveira, Euclides R. Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Goes, Rafael H. T. B. Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Noia, Isabelle Z. Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Pedrini, Cibeli A. Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Urio, Giovana S. Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Batista, Jamille D. O. Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Antônio, Giovani Faculdade de Ciências Agrárias - Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, Dourados, MS, Brazil , Acosta, Anderson P. Faculdade de Medicina Veterinária - Universidade Estadual de Maringá, Umuarama PR, Brazil
Abstract :
This study aimed to evaluate recombinant bovine somatotropin (rbST) supply on feed intake, performance,
serum metabolites, and blood cells count of transition cows. Thirty pregnant Holstein cows (607 ± 28.6 kg of body
weight) were randomly allocated to one of the following treatments: 1) Control (CON), without rbST supply; and
2) rbST: 250 mg of slow release rbST (Lactotropin, Elanco Animal Health, USA) supplied every 14 d from 28 d of
the expected calving date until 28 d of lactation. rbST group had increased dry matter intake during the post partum
period and higher body condition score in both pre- and post-partum periods compared to CON. rbST treatment
increased milk yield and milk fat content. Although no effects were observed on serum metabolites before parturition,
rbST increased post-partum serum concentrations of glucose, cholesterol, and ionized calcium, and decreased serum
concentration of triacyglyceride. rbST had minor effects on complete blood cell count, which included reduced
neutrophil counts. In conclusion, this study supports that rbST supply during transition period improves performance
of dairy cows that is partially related to improvements in metabolism.
