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Increase of feed efficiency in early lactation dairy cows using butafosfan associated or not with cyanocobalamin.

C. Pizoni




Increase of feed efficiency in early lactation dairy cows using butafosfan associated or not with cyanocobalamin.
C. Pizoni*, J. Halfen, V. S. Izquierdo, R. Klaus, E. dos Santos, L. V. Vieira, E. Schmitt, A. A. Barbosa, K. B. Cardoso, B. E. Velasquez, C. C. Brauner, J. O. Feij�, V. R. Rabassa, F. A. B. Del Pino, M. N. Corr�a. N�cleo de Pesquisa, Ensino e Extens�o em Pecuaria (NUPEEC), Departamento de Cl�nicas Veterinaria, Universidade Federal de Pelotas Pelotas, Rio Grande do Sul, Brazil.

The butafosfan with or without cyanocobalamin have been used in early postpartum dairy cows for many years as a strategy to improve the energetic status in cow. The study aimed to evaluate the effect of butafosfan combined or not whit cyanocobalamin on dry matter intake, milk production and metabolism of early lactation dairy cows. Thirty multiparous Holstein cows managed in a compost barn system were enrolled in the trial at the calving date and remained on experiment until 28 DIM. Cows were assigned to 1 of 3 groups: Butafosfan (5mL/100kg of BW, n = 10); Catosal (25mL/animal butafosfan+cyanocobalamin, n = 10); and Control group (25mL/animal, n = 10, NaCl 0.9%) injections at calving (0 d), 3 and 7 DIM. The DMI was evaluated until 21 d and milk production until 28 d of experiment. Blood samples were collected at 0, 3, 7, 14, 21 and 28 d to analyzed NEFA, BHB, acetone and glucose. The data were analyzed using the MIXED procedure of SAS. The DMI was lower in Butafosfan (P < 0.05) when compared with Catosal and Control groups (17.470 � 0.93 kg vs. 20.58 � 0,93 kg vs. 21.10 � 0.77 kg of DMI), which resulted in an average decrease of 3.4 kg. Milk production was greater (P < 0.05) in Catosal when compared with Control, which resulted in an increase of 7.8 kg/milk/d, however Butafosfan group was similar (P > 0.05) than the others (42.17 � 2.47 vs 34.79 � 1.73 vs 37.78 � 1.56), respectively. The feed efficiency was greater (P < 0.01) in Catosal group in compare with the others, while Butafosfan was greater than Control (2.26 � 0.10 vs. 1.87 � 0.10 vs. 1.53 � 0.08), respectively, which can be associated with greater milk production and maintenance of DMI in this group. No treatment effect (P > 0.05), was observed for serum glucose, NEFA and BHB concentrations, however, acetone showed the lowest concentration (P < 0.05) in Catosal group than Butafosfan and Control (1.02 � 0.03 vs. 1.40 � 0.03 vs. 1.42 � 0.04). No effect was observed for milk composition (P > 0.05). These results suggest that the injections of Butaphosphan and Catosal may improve milk production and feed efficiency by modulating DMI.

Keywords: organic phosphorus, fresh cows, dry matter intake.

Biography: Camila Pizoni is a Ph.D. student at the Federal University of Pelotas, Brazil. She received a degree in Veterinary (2012), a tittle of Ruminant Helth Specialist (2015) and an M.S. degree in Animal Sciences (2017) from the Federal University of Pelotas, Brazil. She participated in a research group since 2010, where she started work with dairy cows and develops studies involving strategies to improve the metabolism and health of dairy cows at the beginning of lactation.