Balance energético y capacidad gluconeogénica de vacas lecheras a pastoreo tratadas con una baja dosis de somatotropina recombinante bovina en el período de transición

The aim of the study was to establish the low dose effect (250 mg/cow) of recombinant bovine somatotropin (rbST) in grazing dairy cows during the transition period on energy-protein balance parameters and gluconeogenic capacity. 3 assays were conducted: Prepartum, 10 prepartum cows were used: bST group (bST, n = 5), single dose of rbST on the 26thday (d) prepartum, and control (n = 5); blood samples and body condition score (BCS) were obtained every 3d from 26thd to 6thd prepartum. Pospartum, 10 postpartum cows were used: bST group (n = 5), single dose of rbST on the 6thd postpartum, and control (n = 5); blood samples, body weight (BW), BCS and milk production were obtained and recorded every 3 days from 6thd to 27thd postpartum. Transition, 14 prepartum cows were used: bST group (n = 7), treated with rbST every 14 days from 21thd prepartum to 7thd postpartum, and control (n = 7); blood samples, BW and BCS score were obtained every 3 days from 21thd prepartum to 7thd postpartum; additionally, a propionate loading test was performed (bST, n = 4; control, n = 4) on the 9thd postpartum to assess conversion of propionate to glucose. In all the assays, energy and protein plasma concentration were determined. The treatment of grazing dairy cows with a single dose of rbST in prepartum did not change the energy balance, while in early postpartum it increased milk production without a detrimental effect on energy balance. Propionate to glucose conversion in early postpartum was not affected by the prepartum administration of rbST. © 2014, Universidad Austral de Chile. All rights reserved.

• Autores: Sánchez J.L.; Wagemann C.A.; Strieder Barboza, Clarissa; Noro M.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2014
• Institución: Universidad Cooperativa de Colombia
• Repositorio: Repositorio UCC
• OAI Identifier: oai:repository.ucc.edu.co:20.500.12494/41266
• Acceso en línea: https://doi.org/10.4067/s0301-732x2014000200019; http://www.actamedicacolombiana.com/ojs/index.php/actamed/article/view/1309; https://hdl.handle.net/20.500.12494/41266
• Palabra clave: Bovinae; Nica
• Rights: closedAccess
• License: http://purl.org/coar/access_right/c_14cb