The difference between the gas production (GP) and the dry matter degradation (DMD) of substrates with different amounts of soluble carbohydrates using the in vitro gas production technique was studied. Five substrates (sugarcane, maize silage, Panicum maximum grass, corn grain, 20% CP commercial lactating cow ration and soybean meal) and the same substrates with part of its soluble carbohydrate removed (washed materials) were evaluated. The GP was higher and DMD was lower for washed materials than for the original materials. The carbohydrate concentration affects the results of the gas production technique.
in vitro; prediction; gas; fiber; DMD
