Objetivou-se avaliar o comportamento ingestivo de bezerros da raça Girolando recebendo duas estratégias de aleitamento. Foram utilizados 10 bezerros machos e 8 fêmeas distribuídos em um delineamento em blocos casualizados. As diferentes estratégias de aleitamento foram a oferta de 10 % do peso vivo (PV) em leite e 20 % do PV em leite nos primeiros 30 dias de vida, o qual posteriormente passou a ser ofertado em 10 % do PV, até a desmama com 60 dias de idade para os dois tratamentos. As avaliações comportamentais foram avaliadas quinzenalmente, totalizando 12 horas de observações/dia, com registros em intervalos de 10 minutos, analisadas ao nível de 5% de significância. Não houve diferenças significativas no comportamento ingestivo dos bezerros com os diferentes sistemas de aleitamento avaliados (p0,05). Sendo observados tempos médios de 47,0; 48,5; 28,5; 17,0; 7,3 e 582,9 minutos para pastejo, ruminação, consumo de concentrado, ingestão de água, aleitamento e para atividade de ócio, respectivamente. Não houve diferenças significativas sobre o início de ruminação, sendo iniciada a partir dos 21 dias de idade. Foram verificadas diferenças significativas para a vocalização, independente do período avaliado (manhã ou tarde). Conclui-se que as duas estratégias de aleitamento testadas não interferem no comportamento ingestivo de bezerros da raça Girolando.
The objective was to evaluate the effects of providing protected choline and methionine on the productive performance and milk quality of crossbred cows. Twenty-four animals were used, distributed in randomized blocks according to the number of days in lactation. The treatments were: control, treatment with the addition of 50g of methionine (Methionine), treatment with the addition of 100g of choline (Choline) and finally the treatment with a blend of the two amino acids 100g of choline and 50g of protected methionine (COL/MET). At the beginning of the experiment, milk was weighed, which was repeated every 7 days to measure production. Every 21 days, individual milk samples were collected to prepare the physicochemical composition. In the weeks interspersed with the individual collection, the milk from each treatment was taken separately in order of treatment for the production of fresh Minas cheese and yield evaluation. Data were submitted to analysis of variance in a randomized block design, using a significance coefficient of 5.0% and Tukey's test to compare treatments. No significant differences were observed for production, milk composition and cheese yield, but the supplemented animals showed a greater persistence of production, with a reduction in production from the beginning to the end in the smaller experiment when compared to the control treatment. Additives did not increase milk production and economic yield of cheeses, but improved lactation persistence.
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