前文曾报告动物在严重缺乏核黄素时其主要的影响为食欲降低,因而生长迟缓;但其体内氮储存量与食用完全饲料的对饲动物没有很大的差别。为了进一步检查这个结论和测定饲料中蛋白质含量对於核黄素需要量的影响,又继续研究了轻度核黄素缺乏对於动物食欲,生长和肝氮的影响。 已往关於饲料中蛋白质含量对於核黄素在动物组织中储存及尿中排泄的观察在前文中已有叙述。在蛋白质供给量高时,核黄素於肝脏中储存的量增高,而尿中的排泄量降 Earlier, it was reported that the main adverse effect of animals on the severe lack of riboflavin was the loss of appetite and therefore their growth retardation; however, their in vivo nitrogen storage did not differ significantly from that of intact feed intakes. To further examine this conclusion and determine the effect of dietary protein content on riboflavin requirements, the effect of mild riboflavin deficiency on animal appetite, growth, and liver-N was also investigated. Previous observations regarding the protein content of feed for the storage of riboflavin in animal tissues and urinary excretion have been described above. When the protein supply is high, the amount of riboflavin stored in the liver increases, while the amount of urinary excretion decreases