Accuracy of Techniques for Predicting Gas Production by Ruminants Associated with Diet

The aim of this study was to compare the gas production profiles and nutrient degradability two diets using automatic semiautomatic in vitro techniques. A randomized block design a 2 × factorial arrangement adopted, with comprising different proportions nonfiber carbohydrates (NFCs) (low-NFC vs. high-NFC diets), measurement techniques (automatic semiautomatic) four replicates. blocks represent three runs. Gas from fermentation fiber (Vf2) 22% higher when measured technique than technique. Vt low-NFC diet differed between 22.9% highly positive correlation (r = 0.96) observed techniques, high coefficient determination (R2 0.93). There greater dry matter (DMD) organic (OMD) In both diets, crude protein (CPD) (p < 0.0001). resulted lower pH NH3-N incubation medium that diet, whereas DM, OM CP increased. semi-automatic similarly estimated kinetic parameters total production, demonstrating potential for assessing nutritional value NFCs.