Exogenous amylase increases gas production and improves in vitro ruminal digestion kinetics of sorghum and corn grains

ABSTRACT The aim of this study was to evaluate the effect exogenous amylase on gas production, in vitro dry matter digestibility (IVDMD), and digestion kinetics sorghum (Sorghum vulgaris) two corn hybrids different grain textures. Ruminal fluid collected from rumen-fistulated cows receiving or not (0.7g kg-1 (DM basis)), provided achieve 396 kilo Novo units for activity basis). Gas production measured after 1, 3, 6, 9, 12, 15, 18, 21, 24, 30, 36, 42 e 48 hours incubation. Amylase increased (mL) by 5.4%. Corn have higher than sorghum. Exogenous potential (A) (P=0.01). There an hybrid IVDMD (P<0.01). addition increases improves fermentation kinetics, ammonia nitrogen grains, but does affect short-chain fatty acids production.