Chemical Compositions and Nutritional Evaluation of Energy Feeds For Ruminant Using In vitro Gas Production Technique

Abstract

Eleven energy feed sources were evaluated for nutritive value by in vitro gas production technique. The rumen mixed microbe inoculums source was taken from fistulated Brahman-Thai native crossbred steers. The energy feed source were 1) broken rice 2) paddy rice 3) corn meal 4) rice bran 5) rice pollard 6) rice bran oil relate 7) cassava chip 8) mung bean meal 9) tomato pomace 10) soybean hull and 11) peanut hull. The treatments were assigned to randomize completely block design (blocked by source feedstuffs). The results indicated that soluble gas fractions (a), the fermentation of the insoluble fraction (b), rate of gas production (c) and potential of extent of gas production (|a|+b) were significantly different (p<0.01) among energy feed sources. The cumulative gas volume at 24, 48 and 96 h after incubation were highly significant difference (p<0.01) and estimated Metabolizable Energy (ME) were; 6.42, 5.37, 5.91, 6.68, 4.46, 6.59, 7.42, 5.24, 4.89, 6.18 and 4.48 MJ kg^-1 DM, respectively. Cassava chip exhibited the greatest gas production characteristics, gas volume and estimated metabolizable energy. These results suggested that because cassava chip is available locally and inexpensive, it is the best potential energy source for beef and dairy cattle.