Variation in the Mineral Elements Concentrations among Cultivars of Orchardgrass (Dactylis glomerata L.)

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  • 国内育成オーチャードグラス(Dactylis glomerata L.)品種間に見られるミネラル含有率の差異
  • 国内育成オーチャードグラス(Dactylis glomerata L.)品種間に見られるミネラル含有率の差異〔英文〕
  • コクナイ イクセイ オーチャードグラス Dactylis glomerata

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Abstract

Orchardgrass is one of the major forage grass species in northern Japan, but ruminant livestock grazing on orchardgrass pastures sometimes suffer from grass tetany. If sufficient differences in mineral concentrations exist among orchardgrass cultivars, farmers can reduce the metabolic disorder potential by selecting better cultivars. This study was to investigate the differences in mineral concentrations among orchardgrass cultivars under sheep grazing conditions. There were significant differences among orchardgrass cultivars for N, P, Ca, Mg, SiO _2 and the ratio of K/(Ca+Mg). The concentrations of Ca and Mg for cv. Okamidori were significantly higher than those of other cultivars. The differences between cv. Okamidori and the lowest cv. Akimidori were 0.043 and 0.045 units in Ca and Mg, respectively. The differences resulted in the lower K/(Ca+Mg) ratio of Okamidori (2.53), compared with cv. Akimidori (2.87). Okamidori is considered to be useful for a breeding material reducing the grass tetany potential.

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