Effects of different levels of sodium diformate and Formic acid salt on growth performance, digestive enzymes and innate immunological parameters of Bluga (Huso huso) juveniles

Document Type : Research Paper


1 Department of Fisheries, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran

2 Department of Clinical Sciences, College of Veterinary Medicine Shahid Chamran University of Ahvaz, Ahvaz, Iran


The purpose of this study is to evaluate the effects of Acidifier on the growth performance, nutrition indices, innate immune system, and digestive enzymes activity of Huso huso. A total of 420 Huso huso (30.55 ± 1.72 g) was randomly divided into seven experimental treatments. All groups were fed with the experimental diet for 60 days. The experimental diets contain 0.05, 0.1 and 0.15 % sodium diformate (NDF) and 0.05, 0.1 and 0.15 % Formic acid. Diet control was without any Acidifier. Results show that the best FCR and SGR observed in the group fed with 0.1 % supplemented food by NDF  and Formic acid (p <0.05) at day 30 and 60 respectively. The results show that the immunological parameters including total serum protein, immunoglobulin, serum bactericidal activity, and lysozyme activity were affected significantly by Acidifier (p <0.05). The highest activity of trypsin and chymotrypsin was significant in groups 0.1 % supplemented food by NDF (P?0.05) in the first 30 days. It can be concluded that the addition of 0.1% of NDF to bluga diets improves growth parameters and decreases FCR, increases immunity levels, increases digestive enzyme activity.