易利用性炭水化物の給与が, 反すう動物第 1 胃内揮発性脂肪酸の産生におよぼす影響(in vitro 試験)(農学部門)

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  • Effect of readily available carbohydrate on VFA production by rumen micro-flora (Agriculture)

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Rumen liquid collected from fisturated steer before feeding was used as culture solution. In the first place, incubation was carried out with substrates which were different in availability to examine the effect of availability of substrate on VFA production. The more available substrate produced the higher VFA concentration, the lower molar proportion of acetic acid and the higher molar proportions of propionic and butyric acids. Secondly, wheat flour was used as substrate to examine the effect of the amount of substrate on VFA production. The more amount of substrate produced the high VFA concentration, the lower molar proportion of acetic acid and the higher molar proportions of propionic and butyric acids. These trends were strengthened by cooking of wheat flour. Lastly, the rumen liquid which was collected three hours after feeding was used as culture solution. Similar results were obtained as in the second incubation in VFA production. The molar proportion of acetic acid was decreased by cooking of wheat flour, however, this trend disappeared following urea addition.

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