The Use of Pottasium Diformate in Feed to Improve Immunity Performance of Common Carp (Cyprinus carpio, L)

This research aims to determine the optimum potassium diformate (KDF) dosage which was added to commercial feed to increase the immune performance of common carp fingerlings (Cyprinus carpio L). This study was conducted from October – December, 2021 at the Laboratory of Aquaculture and Molecular Biotechnology of The Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. The method used in this research was experimental in a Completely Randomized Design (CRD) with 5 treatments and 3 replications. The treatments are A (without KDF as control), B (0.2% KDF), C (0.3% KDF), D (0.4% KDF) and E (0.5% KDF). The observed parameters are total leukocyte count, total erythrocyte count, and gross clinical symptoms. Observations were made for 35 days after KDF administration and then challenged by Aeromonas hydrophila for 14 days. Total leukocyte count and total erythrocyte count were analyzed using ANOVA and DMRT at a 95% confidence level, while the gross clinical symptoms was analyzed descriptively. The results showed that the of 0.3% KDF was the most effective dose to increase the immune performance of common carp, the result showed that the total leukocyte count, and total erythrocyte count had the highest increase of 22,95% and 20,55%. In addition, the process of recovering is faster than other treatments it can be shown by the symptoms healing time and number of total leukocyte count and total erythrocyte count are approaching normal condition, with a value of 8,38 × 104 cells/mm3, and 1,46 × 106 cells/mm3.