牛,めん羊および山羊のメタン発生量に及ぼす乾草と濃厚飼料給与比率の影響

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タイトル別名
  • Methane Production in Heifers, Sheep and Goats Consuming Diets of Various Hay-Concentrate Ratios
  • ウシ メンヨウ オヨビ ヤギ ノ メタン ハッセイリョウ ニ オヨボス カンソ

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Six Holstein heifers, 10 Corriedale wethers and 11 castrated male goats of Japanese native breed were used to clarify the effects of hay-concentrate ratios on methane (CH4) production in heifers, sheep and goats, and to find a ready method for estimating CH4 production of ruminants. The three levels of hay-concentrate were 100: 0 (H100), 70: 30 (H70), 30: 70 (H30), which were offered to meet around 150% of total digestible nutrients requirements. The results were as follows: 1) CH4 production was significantly different among animal species. Heifers produced about 7 times and 9 times as much as sheep and goats, respectively. 2) CH4 production was also significantly different among treatments. CH4 production in H30 treatment was significantly lower than that in H70 treatment. It was attributed to lower cellulose content and lower digestibility of fiber fractions caused by a high concentrate diet in the H30 treatment. 3) There were no significant differences in CH4 production per various nutrient intakes among animals though their treatment effects were significant. 4) From the results of multiple regression analyses, the most useful predictors of CH4 production were the amounts of nitrogen, crude fiber and nitrogen free effects intake or those apparently digested. 5) Although estimation by multiple regression equations was more precise, the simple regression equation with dry matter intake was also highly significant. 6) From the above results, it can be concluded that CH4 production by ruminants below 1.5 times maintenance can be estimated adequately from dry matter intake (DMI) alone by the equation CH4(1/day)=0.0305DMI(g/day)-4.441(r=0.992).

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  • 日本畜産学会報

    日本畜産学会報 63 (12), 1221-1227, 1992

    公益社団法人 日本畜産学会

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