BENJAMIN, P.N.2021-10-112021-10-112013UWU/ANS/13/0005http://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/7210/ANS%2013%20005-15022021162031.pdf?sequence=1&isAllowed=yThis study was conducted to determine the effectiveness of different levels of NaHCO3 and different stocking densities on performance and meat quality of broiler chicken. A total of 360, 19-d-old broiler chicks were randomly allocated in to 6 experimental units in a 2 x 3 factorial arrangement of two different stocking densities as Dl(Standard density: 1.2 ft2/bird ) and D2 (High density: 0.85 ft2/bird)and three levels of NaHCO3(0%, 0.3%, 0.5%). Each treatment consisted with 5 replicates. Data were subjected to factorial analysis using the General Linear Models procedure of two-way ANOVA of statistical analysis system. The highest (P< 0.05) daily weight gain of broilers was recorded from D1 (59 g/bird/day), 0.3% NaHCO3 (69 g/bird/day). The highest (P< 0.05) average daily feed intake was recorded from D2 (112 g/bird/day), 0.5% NaHCO3 (116 g/bird/day). Favourable (P< 0.05) feed conversion ratio was obtained from D2 (2.31) and 0% NaHCO3 (3.06). The highest (P< 0.05) pH value was recorded fromD1 (5.53) and 0.3% NaHCO3 (5.51) and lowest (13> 0.05) from D2 (5.35), 0% NaHCO3 (5.30). Highest (P< 0.05) redness of breast meat was recorded from DI (12.49), 0.3% NaHCO3 (12.37). The highest (P< 0.05) relative weight of intestine was ti recorded from 0% NaHCO3 (4.67). Highest (P< 0.05) liver weight was recorded from 0.3% NaHCO3 (2.60). In conclusion, dietary supplementation of 0.3%NaHCO3 has better effects on growth performance of broilers regardless of the stocking density. Keywords: Average daily weight gain, Average feed intake, NaHCO3, Stocking densityenAnimal Science Degree Programme (ANS)Thesis