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Effects of feeding whole milk, waste milk and pasteurized waste milk on dairy bull calf performance.

J. P. Campolina

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06-22-2020

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Abstract:

M67
Effects of feeding whole milk, waste milk and pasteurized waste milk on dairy bull calf performance.
S. F. Vieira1, H. C. Diniz Neto1, J. P. Campolina*1, S. G. Coelho1, M. M. Campos2. 1Department of Animal Science, School of Veterinary Medicine, Federal University of Minas Gerais Belo Horizonte, MG, Brazil, 2Brazilian Agricultural Research Corporation (Empresa Brasileira de Pesquisa Agropecu�ria, EMBRAPA), National Center for Research on Dairy Cattle Juiz de Fora, MG, Brazil.

The aim of this study was to evaluate the impact of using whole milk (WH-M), waste milk (WA-M) and pasteurized waste milk (PW-M) on the performance of dairy bull calves. Forty-five crossbred male calves (Holstein-Gir) were used with mean birth weight of 37.67 � 5.85 kg. Immediately after birth, calves were separated from their mothers, had their navel immersed on iodine (10%), and received 10% of their BW in colostrum (minimum 25 BRIX). In the first 3 d of life, they received transitional milk. On the fourth day, they were distributed in 3 treatments: LI control (n = 15); LD (n = 15) and LDP (n = 15). On the fourth day, they were distributed in 3 treatments: WH-M (n = 15); WA-M (n = 15) and PW-M (n = 15). Six liters of milk per treatment were offered, twice a day, as well as water and starter were provided at will until the age of 57 d. The waste milk came from cows treated with antimicrobials (clinical mastitis, retained placenta and foot disease). Fast pasteurization 72 to 74 C was used for 16 s. Weight and body measurements were performed before morning meals on d 3 after birth, and weekly. The R software was used to perform the statistical analyzes, with P < 0.05 being considered significant. There were no differences between the WH-M, WA-M and PW-M treatments (P > 0.05) for final weight (76.03; 77.43 and 74.0); average daily weight gain (0.670, 0.710 and 0.620 kg / d) and body development - withers height (84.41; 84.15 and 84.28 cm), hip height (87.19; 87.35 and 87.36 cm), hip width (24.95; 25.01 and 24.82 cm) and chest circumference (86.94; 86.16 and 86.23 cm), respectively. Differences were only observed for the evaluation week (P < 0.001), due to the growth of the animals during this period. The use of WA-D and PW-M did not affect animals' weight gain and body development. However, further research is needed to assess the effects of the use of waste milk on the health and performance of calves in the medium and long-term.

Keywords: antimicrobial residue, body measurements, weighing.