Chung T K, Baker D H
Department of Animal Sciences, University of Illinois, Urbana-Champaign 61801.
Poult Sci. 1990 Aug;69(8):1357-63. doi: 10.3382/ps.0691357.
Three experiments were conducted to determine the riboflavin requirement for maximal growth of young chicks. Graded levels of crystalline riboflavin were added to either riboflavin-free, purified amino acid diets or corn-soybean meal diets. Chick growth responses were obtained upon adding riboflavin to both diets. Chicks fed the purified diet required 1.8 mg of riboflavin per kg of diet, but those fed the corn-soybean meal diet required 2.63 mg of riboflavin per kg of diet. Retarded growth and leg paralysis, rather than curled-toe paralysis, were the predominant signs of riboflavin deficiency. Calculations suggested that riboflavin bioavailability in the corn-soybean meal diet was 59.1%.
进行了三项实验以确定雏鸡最大生长所需的核黄素量。将分级水平的结晶核黄素添加到无核黄素的纯化氨基酸日粮或玉米-豆粕日粮中。在两种日粮中添加核黄素后均得到了雏鸡的生长反应。饲喂纯化日粮的雏鸡每千克日粮需要1.8毫克核黄素，而饲喂玉米-豆粕日粮的雏鸡每千克日粮需要2.63毫克核黄素。生长迟缓和腿部麻痹而非卷趾麻痹是核黄素缺乏的主要症状。计算表明，玉米-豆粕日粮中核黄素的生物利用率为59.1%。
