Nowadays, effective microorganisms (EM) is wildly employed in water improvement and agricultural utilization. Many experiments in aquaculture have proved that EM takes positive effects on fish. Naturally, the present experiment evaluated the influence of supplemental EM in feed on tilapia, which contains the growth, immunity, and appetite regulating of juvenile GIFT tilapia. Three different EM-concentration diets (0 g/kg; 30 g/kg; 60 g/kg) were fed to tilapia for 90 days. The results showed that Low and High concentration could promote fish grow. However, most of the serum indicators suggested the little improvement of the immunity in tilapia. The neuropeptide Y (npy) and agouti-related protein (agrp) in brain or cholecystokin (cck) and Ghrelin in hepatopancreas mRNA expression were significantly improved by EM diets. According to the study, fish growth indicated the results of gene expression, thus adding EM to diets suggested positive effects on tilapia culture. The study provided information to aquaculture production.

如今，有效的微生物（EM）已广泛用于水质改良和农业利用中。许多水产养殖实验证明，EM对鱼类有积极作用。自然地，本实验评估了饲料中补充EM对罗非鱼的影响，罗非鱼包含少年GIFT罗非鱼的生长，免疫力和食欲调节。将三种不同的EM浓度日粮（0 g / kg; 30 g / kg; 60 g / kg）喂食罗非鱼90天。结果表明，低浓度和高浓度均可促进鱼类生长。但是，大多数血清指标提示罗非鱼的免疫力几乎没有改善。脑或胆囊收缩素（cck）中的神经肽Y（npy）和刺骨相关蛋白（agrp））和EM饮食可显着改善Ghrelin在肝胰腺中的mRNA表达。根据这项研究，鱼的生长表明了基因表达的结果，因此在日粮中添加EM表明对罗非鱼养殖有积极作用。该研究为水产养殖生产提供了信息。