Malestein A
Tijdschr Diergeneeskd. 1983 Mar 15;108(6):250-3.
The magnesium balance is in a state of equilibrium in dairy cattle when the daily excretion of Mg in the urine is a least 2.5 g. (= 100 mM). When the daily urinary output is 25 l, this is equivalent to a concentration of at least 4 mM (= 100 mg/l). The production of milk was inadequate on a number of dairy farms, which was associated with loss of appetite of the cows. The concentration of Mg in the urine of various cows was found to be too low on these farms. When additional magnesium was supplied, the feed intake was restored within a few days and the milk production also increased. The finding that an inadequate supply of Mg may have a negative effect on the feed intake was supported by some findings reported in the literature.
当奶牛尿液中镁的日排泄量至少为2.5克（=100毫摩尔）时，镁平衡处于平衡状态。当日尿量为25升时，这相当于浓度至少为4毫摩尔（=100毫克/升）。一些奶牛场的牛奶产量不足，这与奶牛食欲不振有关。在这些农场中，发现各种奶牛尿液中的镁浓度过低。当补充额外的镁时，采食量在几天内恢复，牛奶产量也增加了。文献中报道的一些发现支持了镁供应不足可能对采食量产生负面影响这一观点。
