Efeito de enzimas fibrolíticas sobre a composição química da silagem de milho

Resumo

This experiment was carried out to determine the effect of enzymatic solution on bromatologic composition and in situ degradability for neutral detergent fiber (NDF) of maize silage. The treatments were four enzymatic levels, two fermentation periods and three replications. The levels adopted were 0, 5, 10 and 20 mg of enzyme per kg of natural matter (MN) of grass. Experimental silos, in triplicate, were opened 45 and 120 days after ensiling, and DM, NDF, crude protein (CP), N-NH3 and pH were analyzed. In the study of in situ degradability of DM and NDF, silage of 45 days was collected. Nylon bag technique was used with three canulated bovine and three incubation times (6, 24 and 96 hours). The experimental period was of the 36 days. The solution didn’t change the content of DM, pH and N-NH3 values of maize silage. There was no difference on the CP among fermentation periods of, but there was interaction between period of storage and enzymatic level. The solution increased final CP of maize silage after 45 days of ensiling and this effect was higher to 20 mg (10.14%) compared the control (8.77%). In case of NDF, maize silage treated with 10 mg level showed lower fiber content (47.25%) versus untreated control (49.96%), suggesting an improvement in the nutritive value. There was no difference among period of storage neither interaction period of storage and enzymatic level. In situ rumen degradation showed no difference among the treatments on NDF degradation of maize silage.

Descrição

Palavras-chave

Aditivos, Celulases, Degradabilidade, Hemicelulases, Parede celular, Additives, Cellulases, Degradability, Hemicellulases, Cell wall

Citação

CYSNEIROS, Cristine dos Santos Settimi; FRANCO, Gumercindo Loriano; ULHOA, Cirano José; DIOGO, José Mauro da Silva; RAMOS, Allan Kardec Braga. Efeito de enzimas fibrolíticas sobre a composição química da silagem de milho. Ciência Animal Brasileira, Goiânia, v. 7, n. 4, p. 339-348, out./dez. 2006. Disponível em: <https://www.revistas.ufg.br/vet/article/view/854/1001>.