Suplementação de novilhos mestiços em pastejo na época de transição água-seca: Desempenho produtivo, características físicas de carcaça, consumo e parâmetros ruminais

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Abstract

Two experiments were carried out to evaluate the effects of the supplementation in the transition period between wet and dry seasons (May to September) on the productive performance, dry matter intake (DMI), and ruminal pH and N-ammonia. Supplements with 30% of crude protein, supplied in the level of 3 kg/animal/day and constituted by the following energy sources: corn grain (MILHO), grounded corn ear (MDPS) and wheat bran (FT), were evaluated. In the experiment 1, 15 holstein-zebu steers, with average age of 18 months and live weight of 350 kg, were maintained in pasture of Brachiaria brizantha cv. Marandu. The animals showed average daily gain of .85, .88, and .80 kg/animal/day for the supplements MDPS, MILHO and FT, respectively, and did not differ to each other. The carcass physical characteristics were not affected by the treatments. In the experiment 2, five limousin x nelore steers were maintained in pasture of Brachiaria decumbens. The measures pointed reductions in the DMI for the treatments FT and MDPS during May. Differences in DMI among treatments were observed during May, being higher for MILHO, compared to FT and MDPS. The ruminal ammonia concentration only became below 5 mg/dL for the MILHO supplement. The ruminal pH in all the treatments stayed above 6.2.

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Shin-Iti Kabeya, K., Fonseca Paulino, M., Detmann, E., De Campos Valadares Filho, S., Cecon, P. R., De Queiroz, D. S., … Gomes Pereira, O. (2002). Suplementação de novilhos mestiços em pastejo na época de transição água-seca: Desempenho produtivo, características físicas de carcaça, consumo e parâmetros ruminais. Revista Brasileira de Zootecnia, 31(1), 213–222. https://doi.org/10.1590/s1516-35982002000100024

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