棉籽浓缩蛋白替代饲料中豆粕对草鱼生长性能、健康状况及肌肉品质的影响

研究旨在探讨以棉籽浓缩蛋白(Cottonseed protein concentrate, CPC)替代饲料中豆粕对草鱼(Ctenopharyngodon idella)生长性能、健康状况及肌肉品质的影响。设计了6种等氮(29%)等脂(5%)饲料,分别用棉籽浓缩蛋白替代草鱼饲料中0 (C0)、15%(C15)、30%(C30)、45%(C45)、75%(C75)和100%(C100)的豆粕,饲喂养殖于池塘网箱中平均体重为(502.46±0.40) g的草鱼(Ctenopharyngodon Idella)90d。结果显示:(1)在生长性能方面,草鱼的特定生长率和饲料系数在各组之间均无显著性差异(P>0.05)。与C0组相比, C45组草鱼的脏体比显著升高(P<0.05)。(2)在健康状况方面, C100组血清白球比显著低于C0组(P<0.05), C15组血清超氧化物歧化酶(SOD)活性显著高于C0组(P<0.05);各组草鱼肝脏、肌肉组织未发生病变。(3)在肌肉品质方面,与C0组相比, C75组草鱼肌肉粗蛋白含量和C30组异亮氨酸含量显著升高(P<0.0...

SUBSTITUTION OF SOYBEAN MEAL WITH COTTONSEED PROTEIN CONCENTRATE ON GROWTH PERFORMANCE,HEALTH STATUS AND FLESH QUALITY OF GRASS CARP (CTENOPHARYNGODON IDELLA)

The purpose of this study was to investigate the effects of cottonseed protein concentrate (CPC) instead of soybean meal on the growth performance, health status and flesh quality of grass carp (Ctenopharyngodon idella). Six isonitrogenous (crude protein: 29%) and isolipidic (crude lipid: 5%) diets were designed. CPC was used to replace 0 (C0), 15% (C15), 30% (C30), 45% (C45), 75% (C75) and 100% (C100) soybean meal in grass carp diets. The grass carp initial weight of (502.46±0.40) g] were fed in pond cages for 90 days. The results showed that: (1) In terms of growth performance, there was no significant difference in specific growth rate (SGR) and feed conversion ratio (FCR) among groups (P>0.05). The viscerosomatic index (VSI) of grass carp in C45 group was significantly higher than that in C0 group (P<0.05). (2) In terms of health status, the albumin and globulin ratio (A/G) of serum in C100 group was significantly lower than that in C0 group (P<0.05), and the activity of serum superoxide dismutase (SOD) in C15 group was significantly higher than that in C0 group (P<0.05); There were no pathological changes in liver and muscle tissue of grass carp in each group. (3) In terms of flesh quality, compared with C0 group, the crude protein content of grass carp muscle in C75 group and the isoleucine content of C30 group increased significantly (P<0.05), the muscle springiness and adhesiveness of grass carp in C30, C45 and C100 groups increased significantly (P<0.05), and the sarcomere length of grass carp muscle in C75 and C100 groups increased significantly (P<0.05). The results showed that CPC can completely replace soybean meal in grass carp diets, improve its immunity and flesh quality.