The effect of different levels of fresh whole garlic bulb on growth performance, immune system and carcass characteristics in broiler chickens

In order to investigate the effect of fresh whole garlic bulb (FGBP) on production index, immune system and carcass characteristics of Arian broiler strain, 592 male one day old chicks were studied during 42 days in two independent experiments. The first experiment was conducted under normal temperature condition (NTC) with 4 treatments, 4 replicates and 21 birds per replicate and second experiment was conducted under cold temperature condition (CTC) with 4 treatments, 4 replicates and 16 birds per replicate basis balanced completely randomized design. The treatments were 1- basal diet without FGBP (control group), 2, 3 and 4 basal diet containing 0.5, 1 and 1.5 percent FGBP, respectively under both NTC and CTC. The highest level of body weight gain and production index were related to treatment of basal diet with 0.5 percent FGBP treatment under both NTC and CTC (P