WEERASINGHE, W.M.S.S.2021-10-112021-10-112013UWU/ANS/13/0050http://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/7230/ANS%2013%20050-17022021092714.pdf?sequence=1&isAllowed=yThis study was conducted to determine the effectiveness of two different vitamin- mineral premixes on performance, meat quality and meat composition of broiler chicken. A total of ninety (n=90) day-old male broiler chicks were randomly assigned into three dietary treatments. Each treatment comprised three replicates and ten broiler chicks were included in each replicate. Broilers were allocated to one of the three diets and fed for 42 days in a complete randomized design. The dietary treatments included two different premixes as T1 (Basal diet + Vitamin- Mineral premix 1) and T2 (Basal diet + Vitamin-Mineral premix 2) and the control group (TO) fed with the basal diet only. The highest (p<0.05) daily body weight gain (56 g/bird/day) and the lowest (p<0.05) feed conversion ratio (1.68) of broiler birds were recorded from the birds fed T1 diet. The highest (34%) and the lowest cook loss (33%) (P<0.05) were recorded from T2 and T1 treatments, respectively. The highest (p<0.05) manganese concentration (0.065 mg/L) and the crude protein percentage (26%) of chicken breast meat were recorded from the birds fed T1 diet and the lowest manganese concentration (0.0213 mg/L) was recorded from the birds fed control diet. The highest (9%) and the lowest (4%) ash percentages (P<0.05) were recorded from T2 and T1 treatments, respettively. The pH, colour, water holding capacity, texture of broiler breast meat were not affected (p>0.05) by dietary treatments. In conclusion, the supplemental dietary vitamin-mineral premix 1 has made beneficial effects on performance and meat composition of broiler chicken than the dietary vitamin -mineral premix 2.enAnimal Science Degree Programme (ANS)Thesis