Desempenho de novilhas leiteiras Girolandas criadas a pasto com diferentes suplementos

• Autor(a) principal: Santos, Ronald Matos dos
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5982
• topic: Bovino de leite - Alimentação e rações; Novilhas Girolandas; Bovine milk - Food and rations; Girolanda heifers; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

The objective of this work was to evaluate the performance of dairy heifers grazing pasture, supplemented with salt, ureated salt or multiple supplement. This work was realized between January 9th and March 20th, 2013, at the summer season. Twelve heifers with weight and average age of 186 kilos and 13 months, respectively, were distributed in three groups, with four animals in each group. The heifers of urea supplement and multiple supplement were fed 0,4 kg/animal/day and 1,0 kg/animal/day, respectively, and the salt supplement had free access, with intake of 0.055 kg/animal/day. The performance data were analyzed in a complete randomized design, with three treatments and four replicates. There was higher effect of urea and multiple supplement than the salt treatment , with average daily gains 0.619 and 0.730 kg/heifer/day, respectively, and 0.158 kg/heifer/day for salt treatment. There was no effect of treatments on body weight. The daily supplementation costs were R$ 6.23; 29.73 and 71.82 for the salt, urea and multiple supplement, respectively, and the weight gain costs per kilo were R$ 0.624, 0.762 and 1.561 for the salt, urea and multiple supplement, respectively. The observed costs values for the salt and urea treatments are very close, but the urea supplement performance is higher. There was positive economic result for the urea supplement, presenting a similar performance to the multiple supplement, with higher performance than the salt treatment, and saving of 52%.