Effect of Broccoli, Brassica oleracea extract on growth performance and some blood parameters of common carp, Cyprinus carpio

The herb extract of Broccoli, Brassica oleracea was used to feed common carp (19.75±0.057 g) at four incremental levels of 0, 1, 2, and 3% of the diet for 56 days. Fish were fed twice a day at a rate of 3% diets containing 32.7-33.7% crude protein and digestible energy (16.037-16.595 Mj/Kg). At the end of the study, the groups fed 2% broccoli extract were significantly better in weight gain (3.36±0.16 g), relative growth rate (17.02±0.77%), specific growth rate (0.30±0.01% day), food conversion ratio (7.74±0.39) and food conversion efficiency (12.93±0.65%). In terms of hematological parameters, albumin showed significant enhancements in 1, 2, and 3% broccoli extract (P 0.05). However, globulin levels were not affected by broccoli extract inclusion (P 0.05). Total protein and A/G ratio showed significant enhancements in the 2% broccoli extract group (P 0.05). According to the findings, using 2% broccoli extract was the best option for growth and blood profile in common carp rearing. Therefore, the present study recommends adding 2% of broccoli extract to improve nutrient efficiency, growth performance, and hematological parameters in C. carpio fingerlings.