Sekiz S S, Scott M L, Nesheim M C
Poult Sci. 1975 Jul;54(4):1184-8. doi: 10.3382/ps.0541184.
The effect of dietary methionine deficiency was studied in broiler chicks. Graded levels of methionine: 0.25, 0.32, 0.39 and 0.46% in semipurified, soybean meal-corn starch diets were used as treatments. Food intake, body weights and body components were determined. Results show that a moderate methionine deficiency (0.32 and 0.39%) had no effect on growth and energy metabolism expressed as metabolizable energy, productive energy, heat production and tissue gains. Increased food intake in these two groups was reflected not as increased weight gain, but as greater quantities of tissue fat. The experimental group with severe methionine deficiency (0.25%) showed depressed body weight gain, food intake and efficiency of food utilization, with some increase in heat production. Therefore, in general, two types of nutritional responses occurred in broilers, based upon the severity of the methionine deficiency.
研究了蛋氨酸缺乏日粮对肉仔鸡的影响。在半纯化的豆粕-玉米淀粉日粮中使用0.25%、0.32%、0.39%和0.46%的分级蛋氨酸水平作为处理。测定了采食量、体重和身体组成。结果表明，中度蛋氨酸缺乏（0.32%和0.39%）对以代谢能、生产能、产热和组织增重表示的生长和能量代谢没有影响。这两组采食量的增加并非表现为体重增加，而是表现为组织脂肪量增加。严重蛋氨酸缺乏（0.25%）的实验组体重增加、采食量和食物利用效率降低，产热略有增加。因此，总体而言，根据蛋氨酸缺乏的严重程度，肉仔鸡出现了两种营养反应类型。
