<研究報告>モネンシン添加が鼓脹症誘起飼料を給与しためん羊の第一胃内容液の性状に及ぼす影響(畜産学関係)

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The bloat-inhibiting effect of monensin was investigated. A bloat-producing diet of 61% ground barley, 22% alfalfa meal, 16% soybean oil meal and 1% salt was fed to six rumen-fistulated sheep. The experimental periods were composed of pre-treatment, monensin treatment and post-treatment periods of two weeks each. During the monensin treatment period, monensin was added to the basic ration at the rate of 20 ppm. Rumen fluid was collected 2 hr. after morning feeding on the 3rd, 7th, 10th and 14th day of each period, and ruminal characteristics were investigated. The ingesta volume increase (IVI) was smaller (P<0.05), and stable IVI was also smaller (non-significant) when monensin was fed. Gas production, which tended to increase during pre-treatment period, was alleviated by monensin feeding. Viscosity of cell-free rumen fluid was raised (P<0.001), and ruminal pH value was also raised (n. s.) by monensin treatment. Among the protozoa found in the ruminal fluid, the proportion of the genus Ophryoscolex was reduced by monensin treatment. Among the bacteria, the proportion of Gram variable chained cocci and Gram positive chained cocci tended to decrease by monensin treatment. These results suggest, as the results of our former paper did, that monensin inhibits bloating.
石川県農業短期大学の論文
1982-12-25