黄颡鱼幼鱼对饲料中蛋白质和能量需要量的研究

Requirement of juvenile Pelteobagrus fulvidraco for dietary Protein and Energy

以鱼粉和豆粕为蛋白源、大豆油为脂质源配制成3个蛋白质水平(35%、40%和45%)×2个能量水平(1.5×104 J/g和1.6×104 J/g)的6种试验饲料,投喂平均体重为(4.7±0.6)g的黄颡鱼,进行蛋白质和能量需要量的研究.经62 d饲养表明:黄颡鱼幼鱼配合饲料中的适宜蛋白质含量为41.47%～43.38%,最佳能量蛋白比为40.17.在6组试验饲料中,当蛋白质含量为40.38%,能量为1.622×104 J/g时,体重增长率,蛋白质效率,肥满度均为最大值,分别为132.93%、1.14和1.76,饲料系数最低为2.17.

The optimum protein requirement and energy/protein ratio for yellow catfish Pelteobagrusfulvidraco juveniles （body weight, 4.7 ± 0.6 g） were determined using practical diets in a 3 × 2 factorial experiments. The experimental fish were reared for 2 month. Three protein levels （35%, 40% and 45%） and two energy levels （1.5 × 10^4 J/g and 1.6 ×10^4 J/g） were tested. Results were analysed based on ratio of weight gain, feed conversion ratio, protein efficient rate and condition factor. Results show the fitting requirement of protein is 41.47% ～43.38%, optiomal energy/protein ratio is 40.17. When the content of protein test is 40.38% and energy is 1.622 × 10^4 J/g, the maximum weight gain （132.93%）, protein efficiency ratio（1.14） and condition factor（1.76） and the lowest feed conversion ratio （2.17） were obtained.