Nutritional Evaluation of non Forage High Fibrous Tropical Feeds for Ruminant Using in vitro Gas Production Technique

Abstract

Six non forage high fibrous tropical feeds were used to evaluate nutritive value using the in vitro gas production technique. The rumen mixed microbe inoculums were taken from fistulated Brahman-Thai native crossbred steers. The treatments were 1) palm meal (mech-extd), 2) palm meal (solv-extd), 3) leucaena meal (leaf and stem), 4) coconut meal (mech-extd), 5) mung bean meal and 6) dried brewer gain. The treatments were assigned to completely randomize design. The results indicate that soluble gas fraction (a; -7.91, -24.06, -2.11, -28.96, -10.31 and -4.35 mL, respectively), fermentation of insoluble fraction (b; 99.33, 124.06, 70.90, 128.96, 110.31 and 99.33 mL, respectively ), rate of gas production (c; 0.054, 0.071, 0.047, 0.122, 0.050 and 0.045 %/h, respectively) and potential of extent of gas production (a+b; 107.26, 148.13, 73.02, 157.93, 120.62 and 103.82 mL, respectively) were significantly different (P<0.01) among treatments. The cumulative gas volume at 24, 48 and 96 h after incubation were significantly different (P<0.01). These results suggest that coconut meal (mech-extd), palm meal (solv-extd), mung bean meal, palm meal (mech-extd) and dried brewer gain are exhibited high fermentability in the rumen.