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Objetivou-se investigar diferentes niveis de inclusao de tres coprodutos (farelo de germen de milho desengordurado, grao de destilaria de milho e farelo de girassol) sob os parâmetros de degradacao ruminal e digestibilidade in vitro. As dietas experimentais foram constituidas pela inclusao de niveis de 0, 100, 200 e 300 (g kg-1) dos coprodutos. A inclusao farelo de germen de milho desengordurado nao alterou (P>0,05) a producao de gases da fracao CNF, a taxa de degradacao da fracao CNF e a taxa de degradacao da fracao fibrosa, enquanto, a producao de gases da fracao fibrosa apresentou reducao linear (P 0,05) a digestibilidade da MS e a taxa de degradacao da fracao rapida digestao, entretanto a producao de gases da fracao de rapida digestao (VGCNF) apresentou reducao linear (P 0,05) a producao de gases, a taxa de degradacao da fracao CNF e digestibilidade da MS. Assim o grao seco da destilaria do milho e o farelo de girassol podem ser incluidos ate o nivel de 300 g kg-1 nas dietas, e o farelo de germen de milho desengordurado incluido em niveis de ate 100 g kg-1.Palavras-chave: degradacao ruminal; farelo de girassol; farelo de germen de milho; grao seco da destilaria do milho. PARAMETERS OF RUMINAL DEGRADATION AND IN VITRO DIGESTIBILITY OF DIETS FOR RUMINANTS USING DIFFERENT LEVELS OF INDUSTRIAL CO-PRODUCTS ABSTRACT: The objective was to investigate different levels of inclusion of three co-products (defatted corn germ meal, corn distillery grain and sunflower meal) under the parameters of ruminal degradation and in vitro digestibility. The experimental diets were constituted by the inclusion of levels of 0, 100, 200 and 300 (g kg-1) of the co-products. The inclusion of defatted corn germ meal no effect (P>0.05) the production of NFC fraction gases, the NFC fraction degradation rate and the fibrous fraction degradation rate, while the production of fibrous fraction gases presented a linear reduction (P 0.05) the digestibility of DM and the rate of degradation of the fast digest fraction, however the production of gases of the fast digest fraction showed a linear reduction (P 0.05) the gas production, the NFC fraction degradation rate and DM digestibility. Thus, the dry grain of the corn distillery and sunflower meal can be included up to the level of 300 g kg-1 in the diets, and the defatted corn germ meal included in levels of up to 100 g kg-1.Key words: ruminal degradation; sunflower meal; corn germ meal; dry grain from corn distillery.

PARÂMETROS DE DEGRADAÇÃO RUMINAL E DIGESTIBILIDADE IN VITRO DE DIETAS PARA RUMINANTES UTILIZANDO DIFERENTES NÍVEIS DE COPRODUTOS INDUSTRIAIS