当前,提高饲料油脂水平以节约蛋白质、促进生长,已成为水产饲料配制中广为使用的技术手段。而在提高油脂水平以满足养殖鱼类能量需求的同时,油脂源的选择也非常重要。较早前就有学者发现,饲喂以豆油、猪油、鱼肝油等混合的油脂作为脂肪源的饲料,较之单一脂肪源,草鱼稚鱼相对增重率、蛋白质效率及蛋白转化率最大,饵料系数最低,体蛋白质储积也较高(刘玮等,1995)。油脂源选择主要依据其能否满足养殖对象的脂肪酸需求。鱼类所需的重 At present, raising feed fat level to save protein and promote growth has become a widely used technical means in the preparation of aquafeed. While increasing fat levels to meet the energy needs of farmed fish, the choice of source of fat is also important. Earlier, some scholars found that fed soybean oil, lard, cod liver oil and other mixed fat as a fat source of feed, compared to a single fat source, grass carp larva relative weight gain rate, protein efficiency and protein conversion rate of the largest food The lowest coefficient, the body protein accumulation is also higher (Liu Wei et al, 1995). The choice of source of fat is mainly based on its ability to meet the needs of farmed animal fatty acids. The weight required for fish