Author/Authors :
Yakhkeshi، S نويسنده Department of Poultry Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran , , Shawrang، P نويسنده Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute, Karaj, Iran , , RAHIMI، S نويسنده Department of Poultry Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran ,
Abstract :
The effects of Selko-pH (S; 1 mL/L drinking water); Termin-8 (T; 2 kg/ton feed) and Neogermicin (N; 2 L/ton feed) on gastrointestinal tract (GIT) pH, microbial population, ileal digestibility and broiler perform-ance were investigated. The lowest feed intake (FI) was attained by chickens fed diets supplemented with S group in all periods (P < 0.05). The highest weight gain (WG) was achieved by birds fed diet containing N set at 22-42 and 1-42 periods (P < 0.05). The highest and lowest feed conversion ratio (FCR) were obtained by control (C) and N groups at 22-42 and 1-42 days of age, respectively (P < 0.05). Inclusion of acidifiers increased lactic acid bacteria and reduced total coliforms at different ages. The C and N treatments induced the lowest and greatest dry matter and gross energy digestibility coefficients, respectively (P < 0.05). More-over, pH of different parts of GIT were significantly diminished by acidifiers’ treatments compared to C group (P < 0.05). The results of current study have shown that acidifiers improved the gut microflora condi-tions by pH reduction. The digestibility of nutrients and energy utilization were superior by incorporated acidifiers, but S groups played a minor role in this regard.
