Sturén M
Acta Vet Scand. 1985;26(2):179-90. doi: 10.1186/BF03546550.
The effect of intramuscular administration of vitamin D (1×10 IU D/100 kg bodyweight) to 3 different dairy breeds on the serum levels of vitamin D, 25-OH-D, 25-OH-D, Ca, inorganic P and Mg was studied. The vitamin metabolites and the electrolytes were analysed on 9 occasions during a 36-day period. Vitamin D was analysed on 6 occasions during the same period. No significant breed differences were observed except for 25-OH-D (P ≤ 0.05). The D level rose in 1 day from < 2 ng/ml to 906 ng/ml and decreased to below 50 % of the peak level after 6 days. At the end of the experiment (day 36) vitamin D was < 2 ng/ml. 25-OH-D rose from < 2 ng/ml to 106 ng/ml in 6 days and stayed at this level during the whole experiment. 25-OH-D decreased from 16 ng/ml to 5 ng/ml during the observation period.
研究了对3种不同奶牛品种肌肉注射维生素D（1×10 IU D/100千克体重）对血清中维生素D、25-羟基维生素D、25-羟基维生素D、钙、无机磷和镁水平的影响。在36天的时间内分9次分析维生素代谢产物和电解质。同期分6次分析维生素D。除25-羟基维生素D外（P≤0.05），未观察到品种间的显著差异。维生素D水平在1天内从<2纳克/毫升升至906纳克/毫升，并在6天后降至峰值水平的50%以下。实验结束时（第36天）维生素D<2纳克/毫升。25-羟基维生素D在6天内从<2纳克/毫升升至106纳克/毫升，并在整个实验期间维持在该水平。在观察期内，25-羟基维生素D从16纳克/毫升降至5纳克/毫升。
