The present experiment was conducted to study the effect of dietary supplementation of probiotic bacteria (Lactobacillus plantarum) on growth and body composition of common carp. The experiment was conducted in fiberglass-reinforced plastic (FRP) tanks (1.5 × 1.0x0.75 m), consisted of 5 treatments (T1, T2, T3, T4 and T5) with 3 replicates each for 120 days. Probiotic bacterial strain L. plantarum FLB1 was incorporated into test diets at different level [@ 0 (T1), 10⁶ colony-forming unit (CFU)/g (T2), 10⁷ CFU/g (T3), 10⁸ CFU/g (T4) and 10⁹ CFU/g (T5) of test diet] to study the effect on growth and body composition. Water quality parameters particularly dissolved oxygen and ammonia significantly (p ≤ 0.05) improved in T5 compared to control but remained within the range for carp culture in all the treatments. At the end of the experiment (120 days), NWG, % NWG, SGR, K-values and survival rate (%) were also maximum in T5 (37.82, 271.89, 1.09, 1.30 and 96.29, respectively) and minimum in T1 (25.29, 179.48, 0.85, 1.11 and 81.47, respectively) with significant differences (p ≤ 0.05). FCR and PER improved significantly (p ≤ 0.05) in T5 (1.97 and 1.53, respectively) compared to control (T1). Significant increase (p ≤ 0.05) in the flesh protein (%) and total lipid (%) content was recorded in T5 (16.21 and 2.83, respectively). Overall results revealed that dietary supplementation of L. plantarum @ 10⁹ cfu/g diet is effective in improving water quality, growth and proximate composition of Cyprinus carpio.

本实验旨在研究日粮中添加益生菌（植物乳杆菌）对鲤鱼生长和身体成分的影响。实验在玻璃纤维增​​强塑料 (FRP) 罐（1.5 × 1.0x0.75 m）中进行，包括 5 个处理（T1、T2、T3、T4 和 T5），每个处理 3 个重复，持续 120 天。益生菌菌株L. plantarum FLB1 以不同水平掺入测试饮食中 [@ 0 (T1), 10 ⁶菌落形成单位 (CFU)/g (T2), 10 ⁷  CFU/g (T3), 10 ⁸  CFU/ g (T4) 和 10 ⁹ CFU/g (T5) of test food] 研究对生长和身体成分的影响。 与对照相比，T5 中的水质参数，特别是溶解氧和氨显着改善( p ≤ 0.05)，但在所有处理中都保持在鲤鱼养殖的范围内。在实验结束时（120 天），NWG、% NWG、SGR、K 值和存活率 (%) 在 T5 中也最大（分别为 37.82、271.89、1.09、1.30 和 96.29），在 T1 中最小（ 25.29、179.48、0.85、1.11 和 81.47），具有显着差异（p  ≤ 0.05）。 与对照 (T1) 相比，T5（分别为 1.97 和 1.53）的FCR 和 PER 显着改善（p ≤ 0.05）。显着增加（p ≤ 0.05) 的肉蛋白 (%) 和总脂质 (%) 含量记录在 T5 中（分别为 16.21 和 2.83）。总体结果表明，添加植物乳杆菌@ 10 ⁹  cfu/g 日粮可有效改善鲤鱼的水质、生长和近似组成。