Effect of feeding frequency on digestibility, property of rumen liquor and blood under the condition of different ratios of concentrate and roughage in sheep
1999
Takahashi, T. (Yamagata univ., Tsuruoka (Japan). Faculty of Agriculture) | Kanno, M. | Kayaba, T.
Four sheep fitted with rumen fistula were used for this experiment. Experimental animals were fed with concentrate (commercial formula feed for beef cattle) and Italian ryegrass hay chopped at the length of 2 cm, by mixing with proper water; i. e., the ratios of concentrate and roughage were set 8 : 2 (high concentrate ration) and 2 : 8 (high roughage ration). The amounts of ration were determined at 80 % level in case of ad lib. feeding at both ratios. Two feeding frequencies were set, according to once feeding and three times feeding at every eight hours per day. Digestion trial was conducted with 4 x 4 Latin square method from four treatments of different concentrate and roughage ratio with feeding frequency. On the next day of each trial, rumen liquor and blood were sampled during 24 hours. Digestibility tended to be higher in three times feeding than that of once feeding with high concentrate ration. In case of high roughage feeding, however, digestibility tended to be lower in three times feeding than in once feeding. Especially, digestibility of nitrogen free extract and organic cell wall was remarkably lower in three times feeding than once feeding (p0.05). Total volatile fatty acid (VFA) content increased immediately after feeding and gradually decreased during 24 hours in once feeding of both ratios of concentrate and roughage. In three times feeding of both ratios, on the other hand, VFA content showed three peaks after each feeding
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