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vol.37 número3Relação lisina digestível: proteína bruta em dietas para frangos de corte no período de 1 a 21 dias de idade. Desempenho e metabolismoNíveis de proteína e fósforo em rações com fitase para frangos de corte, na fase de 14 a 21 dias de idade: 2. valores energéticos e digestibilidade de nutrientes índice de autoresíndice de assuntospesquisa de artigos
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Revista Brasileira de Zootecnia

versão impressa ISSN 1516-3598versão On-line ISSN 1806-9290

Resumo

RUIZ, Urbano dos Santos et al. Enzyme complex for swine: nutrient digestion, metabolism, performance and environmental impact. R. Bras. Zootec. [online]. 2008, vol.37, n.3, pp.458-468. ISSN 1516-3598.  http://dx.doi.org/10.1590/S1516-35982008000300011.

Two experiments were conducted to evaluate dietary enzyme supplementation (amylase, pentosanase, celulase and a-galactosidase) in corn-soy diets for swine. In the Exp 1, the apparent digestibilities of energy, dry matter, protein and fibers of the feeds were determined, using a nutritional matrix with or without enzyme supplementation for barrows with 19.96 ± 2.90 kg body weight. The total feces collection method was used and the diets were formulated with reduced energy, protein and amino acids levels. In the Exp 2, growth performance, production and composition of feces in total solids, volatile solids, nitrogen, macro and micro minerals, in relation to growth performance, were measured in barrows from 50 to 151 days of age and 18.34 ± 1.35 kg initial body weight. Three experimental diets were used, one formulated to meet or exceed the nutritional requirements of swine according to NRC (1998) and the others with reduced energy, protein and amino acids levels, with or without the enzyme complex. It was used a complete randomized block design. Dietary enzyme supplementation in feeds based mainly on corn and soybean meal did not improve nutrient digestibilities and growth performance neither reduced nutrient excretion in feces. More research is necessary to test new nutritional matrix and different levels of the enzyme complex.

Palavras-chave : environmental pollution; exogenous enzymes; feces production and composition; piglets.

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