A 6‐week feeding trial was conducted to investigate the effects of dietary supplementation with peony pollen on growth performance, intestinal function, fillet quality and fatty acids profiles of common carp. The results showed that supplementation of peony pollen significantly improved the growth performance. The textures of muscle in terms of hardness, springiness, cohesiveness, gumminess, chewiness and resilience were higher in peony pollen groups than control group. Dietary supplementation with peony pollen significantly improved the fold height, enterocyte height, microvillus height, intestinal wall thickness and intestinal crypt height of mid‐intestine from common carp in contrast to basal diet. Moreover, peony pollen could significantly increase digestive capacity observed in terms of an increase in lipase, amylase and trypsase activities. Peony pollen supplementation enhanced the antioxidant capacity via an increase in catalase, and total antioxidant capacity, accompanied by a significant reduction in malondialdehyde. Dietary supplementation with peony pollen may regulate lipid metabolism and fatty acids composition of common carp. Overall, the peony pollen could improve the fish health status by elevating immune responses and antioxidant capacity of intestine and system immunity. And the optimum concentration was recommend is 30 g peony pollen per kilogram feed. Further studies on the peony pollen practical approaches during culturing periods in the aquaculture industry are needed.

中文翻译：

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日粮中添加牡丹花粉对鲤鱼生长，肠道功能，鱼片质量和脂肪酸谱的影响

进行了为期6周的喂养试验，以研究饮食中添加牡丹花粉对鲤鱼生长性能，肠道功能，鱼片质量和脂肪酸谱的影响。结果表明，补充牡丹花粉显着提高了生长性能。牡丹花粉组的硬度，弹性，内聚力，胶粘性，耐嚼性和回弹性方面的肌理高于对照组。与基础饮食相比，添加牡丹花粉的饮食可以显着改善鲤鱼中肠的褶皱高度，肠上皮细胞高度，微绒毛高度，肠壁厚度和肠隐窝高度。此外，就脂肪酶，淀粉酶和胰蛋白酶活性的增加而言，牡丹花粉可以显着提高消化能力。牡丹花粉补充剂通过增加过氧化氢酶和总抗氧化剂能力而增强了抗氧化剂的能力，同时丙二醛也明显减少。饮食中补充牡丹花粉可能会调节鲤鱼的脂质代谢和脂肪酸组成。总体而言，牡丹花粉可以通过提高肠道的免疫反应和抗氧化能力以及系统免疫来改善鱼类健康状况。推荐的最佳浓度是每公斤饲料30克牡丹花粉。需要对水产养殖业养殖期间牡丹花粉实用方法的进一步研究。饮食中补充牡丹花粉可能会调节鲤鱼的脂质代谢和脂肪酸组成。总体而言，牡丹花粉可以通过提高肠道的免疫反应和抗氧化能力以及系统免疫来改善鱼类健康状况。推荐的最佳浓度是每公斤饲料30克牡丹花粉。需要对水产养殖业养殖期间牡丹花粉实用方法的进一步研究。饮食中补充牡丹花粉可能会调节鲤鱼的脂质代谢和脂肪酸组成。总体而言，牡丹花粉可以通过提高肠道的免疫反应和抗氧化能力以及系统免疫来改善鱼类健康状况。推荐的最佳浓度是每公斤饲料30克牡丹花粉。需要对水产养殖业养殖期间牡丹花粉实用方法的进一步研究。