Rutin is a natural flavone derivative with many biological activities. To investigate the effects of dietary rutin on growth, serum antioxidant response and flesh quality of grass carp (Ctenopharyngodon idella), six diets were prepared with the rutin inclusion at 0 (control diet), 0.2, 0.4, 0.6, 0.8 and 1.0 g/kg, respectively. Grass carp with initial body weight of 18.5 ± 0.2 g were fed with the six diets for 60 days. The weight gain was increased from 348.5% (the control) to 364.4%, 366.5% (p < .05), and feed conversion ratio was decreased from 1.56 (the control) to 1.49, 1.48 (p < .05), respectively, by the supplementation of 0.8 and 1.0 g/kg rutin in diets. Serum SOD activity was increased by the addition of 0.2–1.0 g/kg rutin (p < .05), and serum MDA content was decreased by the addition of 0.4–1.0 g/kg rutin (p < .05). The inclusion of 1.0 g/kg rutin and 0.6–1.0 g/kg rutin significantly increased the collagen content and the total free amino acids in flesh (p < .05), respectively. The content of n‐3 PUFA in flesh was also promoted by the inclusion of 0.2 and 0.6 g/kg rutin (p < .05). However, dietary rutin did not significantly affect the flesh texture and water‐holding capacity. In conclusion, dietary rutin could improve the growth, antioxidant response ability and flesh quality of grass carp, and the recommended supplemental level of rutin was 0.8–1.0 g/kg.

中文翻译：

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膳食芦丁促进草鱼的生长，血清抗氧化反应和果肉胶原蛋白，游离氨基酸含量

芦丁是具有许多生物活性的天然黄酮衍生物。为了研究日粮芦丁对草鱼生长，血清抗氧化反应和肉质的影响（Ctenopharyngodon idell a），准备了六种日粮中芦丁含量为0（对照日粮），0.2、0.4、0.6、0.8和1.0 g的日粮/ kg。初始体重为18.5±0.2 g的草鱼用这六种饲料喂养了60天。增重从348.5％（对照）增加到364.4％，366.5％（p  <.05），饲料转化率分别从1.56（对照）降低到1.49、1.48（p  <.05），在饮食中补充0.8和1.0 g / kg芦丁。添加0.2–1.0 g / kg芦丁可增加血清SOD活性（p <.05），并且通过添加0.4–1.0 g / kg芦丁降低了血清MDA含量（p  <.05）。加入1.0 g / kg芦丁和0.6–1.0 g / kg芦丁分别显着增加了肉中的胶原蛋白含量和总游离氨基酸含量（p  <.05）。肉中n-3 PUFA的含量也因加入0.2和0.6 g / kg芦丁而提高（p  <.05）。但是，饮食中的芦丁对肉的质地和保水能力没有显着影响。总之，日粮芦丁可以改善草鱼的生长，抗氧化反应能力和肉质，推荐的芦丁补充水平为0.8-1.0 g / kg。