发酵豆粕对圆斑星鲽生长及表观消化率的影响

为探讨圆斑星鲽(Verasper variegatus)饲料中发酵豆粕的适宜添加量,本试验以0%、10%、20%、30%、40%的发酵豆粕添加在五组等蛋等脂的饲料中,分别替代鱼粉蛋白的0%,9.81%,19.63%,29.44%,39.26%,标记为A、B、C、D、E共5个试验组,每组设3个重复,每池15尾圆斑星鲽(49.0±1.0 g),经过10周的饲养试验,结果表明:随饲料中发酵豆粕水平的升高,特定生长率逐渐降低,A、B组显著高于其他各组(P<0.05),饲料系数则逐渐升高,A、B和C组显著低于D、E组(P<0.05)。营养物质表观消化率以B组最高,显著高于其他各组。综上所述,饲料中添加10%的发酵豆粕在一定程度上能提高鱼体对营养物质的表观消化率,且不会对鱼体生长造成不利影响,过量则抑制鱼体生长。

Effects of dietary fermented soybean meal on the growth and apparent digestibility of the spotted halibut Verasper variegatus

A 10-week feeding experiment was conducted to determine the optimum level of fermented soybean meal (FSBM, in replacement of the fishmeal) in the diet for spotted halibut, Verasper variegatus . The five isocaloric and isonitrogenous diets contained 0, 10%, 20%, 30% and 40% FSBM replacing 0 (A), 9.81%(B), 19.63%(C),29.44%(D) and 39.26%(E) fishmeal protein respectively. Each diet was randomly given to a triplicate of 15 fish (49.0±1.0 g) per tank in the indoor culture system. The results showed that specifc growth rate (SGR) decreased while feed intake increased with increasing dietary fermented soybean meal levels. Apparent digestibility of nutrients were significantly larger in the fish fed with Diet B than the fish fed with other diets ( P <0.05).These results indicated that 10% FSBM in the diet may not have significant effects on the growth, excessive FSBM could result in poor growth performance.