Effect of Orchardgrass (Dactylis glomerata L.) Cultivars with Different Mineral Levels on Serum Mineral Concentrations in Grazing Sheep

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  • オーチャードグラス品種のミネラル含有率の差異がめん羊の血清中ミネラル濃度に及ぼす影響
  • オーチャードグラス品種のミネラル含有率の差異がめん羊の血清中ミネラル濃度に及ぼす影響〔英文〕
  • オーチャードグラス ヒンシュ ノ ミネラル ガンユウリツ ノ サイ ガ メンヨ

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Abstract

Two experiments were conducted to confirm the response to serum mineral concentrations in sheep which have grazed on pasture comprised of different orchardgrass cultivars. Experiment 1 was conducted in order to compare four orchardgrass cultivars with the other species, and Experiment 2 was to compare two orchardgrass cultivars. In Experiment 1, mineral concentrations of forage were significantly different among orchardgrass cultivars in Ca, but not in N, P, K and Mg. Yatugane perennial ryegrass indicated the highest Ca concentrations followed by Hokuryo tall fescue and four orchardgrass cultivars. Among orchardgrasscultivars, Okamidori had the highest value and Akimidori the lowest. When serum in sheep was compared based on the changing values between the first and the last day of the grazing period, there were significant differences among grass cultivars in K, Ca, and Mg. For all of K, Ca and Mg, the changing values were positive for cv.Okamidori, but negative for cv.Kitamidori. In Experiment 2, there were significant differences between cultivars in N, K, Ca and Mg for forages, and cv.Okamidori was higher in these minerals than cv.Akimidori. The changing values of serum minerals were considerably higher in sheep grazing on pasture comprising cv.Okamidori for total protein, Ca, Mg and Cl than those grazing on cv.Akimidori, although the differences were not significant. The difference of some mineral concentrations seen between orchardgrass cultivars was important enough to affect serum mineral concentrations in sheep.

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