青鱼饲料最适能量蛋白比的研究

用酪蛋白和明胶作为饲料蛋白源，配以豆油、糊精和纤维素粉及适量的维生素和矿物混合剂组成精制试验饲料。将其调制成五个蛋白水平，每个蛋白水平分别包括五个能量级，以青鱼(Mylopharyngodon piceus)鱼种为试验对象，经过60天的喂养试验，用净增率、蛋白质效率(PER)和饲料系数等作为评定指标。结果表明：青鱼鱼种配合饲料中的蛋白质含量为35～40％；饲料能量蛋白比(即C／P值)为9．1千卡／克蛋白；每公斤饲料的总能量为3185～3640千卡是最为适宜的。上述这些数据是制定应用饲料配方的主要理论依据。试验还发现，青鱼鱼种对糊精之类的碳水化合物具有较大的利用能力；试验证明：可利用的碳水化合物具有较好的节约饲料蛋白的作用。

THE OPTIMUM CALORIE PROTEIN RATIO IN THE DIET FOR BLACK CARP FINGERLINGS

Studies were conducted on optimum calorie-protein ratio for blackcarp(Mylopharyngodon piceus) by using purified diet consisting of casein, gelatin,soybean oil, dextrin, cellulose flour. mixed vitamins and minerals. There were fiveprotein levels and five calorie grades at each protein level. The results of the experi-ment indicate that 35-40% protein content, 9. 1 calorie-protein ratio (c/p value) and3185-3640 kcal/kg in formulated diet for black carp fingerlings seem optimum,taking the wieght gain, protein efficiency ratio (PER) and food conversion asevaluation targets after 60 days of feeding experiment.These provided scientific basis ferpractical use. According to the results of the experiment, black carp fingerlings havethe ability to digest carbohydrate such as dextrin. So,it can be considered carbohydrate.is one of useful calorie sources in black carp diet and a component to spare protein