This study was conducted to investigate the effects of Spirulina and ferrous fumarate supplementations into diets on growth parameters, pigmentation, digestive enzyme activity, antioxidant enzyme activity and fatty acids composition of Yellow River carp. Three experimental groups included control, Spirulina (diet 1), mixture of Spirulina and ferrous fumarate treatments (diet 2) in 3 replications in 9 aquariums. Fifteen fish in each aquarium were fed twice a day for six weeks. Compared to the control group, the Yellow River carp fed with the Spirulina and ferrous fumarate had a higher specific growth rate (P < 0.05). The total carotenoids content in Yellow River carp skin and scale was significantly higher for fish fed diet with Spirulina and ferrous fumarate relative to all other diets (P < 0.05). The color parameters of L *, a *, b*, Hue (H_ab°) and Chroma (ch*) were calculated for all treatments. Obtain findings revealed that the Spirulina and ferrous fumarate treatment could provide the desired skin color exactly of Yellow River carp. The Spirulina and ferrous fumarate supplementation significantly elevated intestinal digestive capacity by increasing amylase, lipase, and trypsin enzyme activities (P < 0.05). The results obtained indicated that Spirulina and ferrous fumarate supplementation could improve intestinal health through enhancing intestinal digestive enzyme activity and reducing tissue peroxidation. In addition, the Spirulina and ferrous fumarate has a satisfactory nutritional value of improving the fatty acid profile. Therefore, the use of Spirulina and ferrous fumarate as feed additive could be practiced in the aquaculture species.

本研究旨在研究在日粮中添加螺旋藻和富马酸亚铁对黄河鲤鱼的生长参数、色素沉着、消化酶活性、抗氧化酶活性和脂肪酸组成的影响。三个实验组包括对照组、螺旋藻（饮食 1）、螺旋藻和富马酸亚铁处理的混合物（饮食 2），在 9 个水族馆中进行 3 次重复。每个水族箱中的 15 条鱼每天喂两次，持续六周。与对照组相比，饲喂螺旋藻和富马酸亚铁的黄河鲤鱼比生长率更高（P< 0.05)。螺旋藻和富马酸亚铁饲料的黄河鲤鱼皮和鳞中总类胡萝卜素含量显着高于其他饲料（P < 0.05）。计算所有处理的 L*、a*、b*、色调 ( _Hab °) 和色度 (ch*)的颜色参数。获得的研究结果表明，螺旋藻和富马酸亚铁处理可以提供准确的黄河鲤鱼所需的皮肤颜色。的螺旋藻和富马酸亚铁补充通过增加淀粉酶，脂酶显著升高肠消化能力，和胰蛋白酶的酶活性（P <0.05）。所得结果表明，螺旋藻富马酸亚铁补充剂可以通过增强肠道消化酶活性和减少组织过氧化来改善肠道健康。此外，螺旋藻和富马酸亚铁具有令人满意的改善脂肪酸分布的营养价值。因此，可以在水产养殖品种中使用螺旋藻和富马酸亚铁作为饲料添加剂。