Gatlin D M, Robinson E H, Poe W E, Wilson R P
J Nutr. 1982 Jun;112(6):1182-7. doi: 10.1093/jn/112.6.1182.
Purified casein diets with and without supplemental magnesium were fed to fingerling channel catfish (Ictalurus punctatus) in order to establish the essentially of this mineral. Fish fed the basal diet containing 0.004% magnesium developed deficiency signs such as poor growth, anorexia, sluggishness, muscle flaccidity and high mortality. After 3 weeks, two groups of fish fed the basal diet were converted to the supplemental diet containing 0.057% magnesium. Deficiency signs in these fish were alleviated almost immediately. In a second experiment, graded levels of magnesium sulfate were added to casein-based diets and fed to channel catfish fingerlings to determine their dietary requirement for magnesium. Results indicated that a minimum magnesium level of 0.04% of the dry diet was required to maintain normal growth, serum and bone magnesium levels in channel catfish fingerlings.
为确定镁这种矿物质的必要性，给斑点叉尾鮰鱼苗投喂了添加和未添加镁补充剂的纯化酪蛋白日粮。投喂含0.004%镁的基础日粮的鱼出现了生长不良、食欲不振、行动迟缓、肌肉松弛和高死亡率等缺乏症迹象。3周后，两组投喂基础日粮的鱼改喂含0.057%镁的补充日粮。这些鱼的缺乏症迹象几乎立即得到缓解。在第二项实验中，向酪蛋白日粮中添加不同水平的硫酸镁并投喂给斑点叉尾鮰鱼苗，以确定它们对镁的日粮需求量。结果表明，斑点叉尾鮰鱼苗维持正常生长、血清和骨骼镁水平所需的日粮中镁的最低水平为干日粮的0.04%。
