Navedo Guzmán, Ninochka

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    Efectos de un protocolo de alimentación intensiva sobre el crecimiento y salud de becerras y becerros Holstein y Jersey en el trópico
    (2020-05-26) Navedo Guzmán, Ninochka; Ortiz Colón, Guillermo; College of Agricultural Sciences; Sánchez Rodríguez, Héctor L.; Jiménez-Cabán, Esbal; Curbelo Rodríguez, Jaime E.; Department of Animal Science; Plaza Delestre, María de L.
    The objective of this research was to assess the growth and health of Holstein and Jersey calves under an intensive feeding protocol (INT) and a traditional feeding protocol (TRA) under tropical conditions. Calves were divided into blocks based on their breed and gender (n=31). Each animal was in the feeding trial for 7 weeks. Both groups of calves were offered were fed pasteurized waste milk at 0600 and 1700 h daily for seven weeks. The TRA group was offered 3.78 L of milk per day for seven weeks. The amount of milk offered to the INT group was 3.78, 4.74, 5.68, 6.62 and 7.56 L/d from week one to week five, respectively. Afterwards the milk offered to the INT group was reduced to 5.68 and 3.32 L in weeks six and seven, respectively. Both groups were fed the same amount of calf starter (18% crude protein and 2.5% fat). The amount of calf starter offered daily was progressively increased from 0.23 to 0.91 kg from week 1 through 7. Morphometric measures (hip height, cross height, hip width and body length), weight, and health assessment were taken weekly. The data was analyzed with a Prox GLIMMIX with SAS. The feeding protocols did not influenced any of the evaluated parameters for Holstein (P=0.6803), Jersey (P=0.6803), male (P=0.9642) or female (P=0.9642) calves. In the weight parameter, at week 7, the female Holstein calves weighed 55.83 ± 5.00 and 54.19 ± 3.23 kg for the INT and TRA group respectively (P = 1.00). Similarly, both protocols had no effect on the health status of Holstein (P=0.3061), Jersey (P=0.3061), male (P=0.7914) or female (P=0.7914) calves. In conclusion, the INT feeding protocol failed to enhance body growth and did not affect the health status in dairy calves raised under tropical conditions.