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Effects of exogenous multienzyme complex supplementation in diets on growth performance, digestive enzyme activity and non‐specific immunity of the Japanese seabass, Lateolabrax japonicus
Aquaculture Nutrition ( IF 3.5 ) Pub Date : 2020-02-12 , DOI: 10.1111/anu.12991
Zhangfan Huang 1, 2 , Zhongbao Li 1, 2 , Anle Xu 1, 2 , Dengjie Zheng 1, 2 , Youling Ye 1, 2 , Zhen Wang 1
Affiliation  

This experiment aimed to investigate the effects of exogenous multienzyme complex (EC) on growth performance, digestive enzyme activity and non‐specific immunity of the Japanese seabass, Lateolabrax japonicus (initial weight 27.09 ± 0.08 g). EC includes protease, xylanase, glucanase and mannase. Japanese seabass were given six levels of EC (0, 0.5, 1.0, 1.5, 2.0 and 2.5 g/kg) for 28 days. Results show that EC significantly enhanced the weight gain rate and specific growth rate (p < .05), while the feed conversion ratio reduced significantly (p < .05). Activities of lipase and trypsin in liver and intestine significantly increased (p < .05). Alkaline phosphatase, superoxide dismutase and lysozyme activities in serum and liver significantly increased (p < .05), while the content of malondialdehyde in liver significantly declined (p < .05). Regression analysis showed that the optimal supplementation of EC in WGR, SGR, FCR, SOD and LZM activity in serum was 1.66, 1.67, 1.81, 1.71 and 1.53 g/kg, respectively, while the best SOD, LZM activity in liver, trypsin activity in liver and intestine supplement were 1.64, 1.51, 1.81 and 1.97 g/kg. In conclusion, EC supplemented can improve the growth performance, digestive enzyme activity and non‐specific immunity of Japanese seabass, and it is recommended that the optimal supplementation of EC in diets of Japanese seabass is 1.5–2.0 g/kg.

中文翻译:

在日粮中添加外源多酶复合物对日本鲈鱼生长性能、消化酶活性和非特异性免疫的影响

本实验旨在研究外源多酶复合物(EC)对日本鲈鱼(初重27.09±0.08 g)生长性能、消化酶活性和非特异性免疫的影响。EC包括蛋白酶、木聚糖酶、葡聚糖酶和甘露糖酶。日本鲈鱼被给予六种水平的 EC(0、0.5、1.0、1.5、2.0 和 2.5 g/kg),持续 28 天。结果表明,EC 显着提高了增重率和比生长率 (p < .05),而饲料转化率显着降低 (p < .05)。肝脏和肠道中脂肪酶和胰蛋白酶的活性显着增加(p < .05)。血清和肝脏中碱性磷酸酶、超氧化物歧化酶和溶菌酶活性显着增加(p < .05),而肝脏中丙二醛的含量显着下降(p < .05)。05)。回归分析表明,血清中WGR、SGR、FCR、SOD和LZM活性中EC的最佳添加量分别为1.66、1.67、1.81、1.71和1.53 g/kg,而肝脏中SOD、LZM活性、胰蛋白酶活性最佳在肝脏和肠道补充剂分别为 1.64、1.51、1.81 和 1.97 g/kg。综上所述,添加EC可以提高日本鲈鱼的生长性能、消化酶活性和非特异性免疫,建议日本鲈鱼日粮中EC的最佳添加量为1.5-2.0 g/kg。
更新日期:2020-02-12
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