عنوان مقاله [English]
In this study, to evaluate the production characteristics, internal organs and meat quality characteristics, 225 one-day-old Japanese quail were tested in a completely randomized design with 5 treatments, 3 replicates and 15 quail per replicate for 35 days. The treatments were consisted of control diet and diets containing 0.5, 1, 1.5 and 2 % levels of thyme. The performance parameters i.e. feed intake, weight gain and FCR were assessed periodically. The Results revealed that diets containing 2% of thyme decreased feed intake in growth and the entire experiment period significantly (P<0.05). Diets containing 1.5 and 2% thyme reduced weight gain compared to controls during the entire period significantly (P<0.05). Diet containing 0.5% thyme, improved FCR in the starter period significantly (P<0.05), but The FCR in the growth period and the entire period did not show significant difference (P>0.05). The relative weight of carcass and gastrointestinal tract components were not affected by treatments (P>0.05). The highest relative weight of spleen and bursa were observed in 1 and 2% of thyme’s diets respectively (P<0.05). Diet containing 2% thyme reduced the relative weight of oviduct and follicles and also reduced the number of follicles and oviduct length in compare to the control treatment (P<0.05). The Meat oxidative stability were not affected by treatments in the slaughter day (P>0.05) but microbial count of meat decreased significantly with thyme powder levels in compare to the control treatment (P<0.05). use of thyme in the diet of quail significantly decreased feed intake and improved FCR.
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