Effect of Zataria multiflora boiss (thyme) extract and fat on meat quality, intestinal pH and serum antioxidant status of broiler chicks
2017
Nobakht, M. | Darmani-kuhi, H. | Mohiti-Asli, M.
Includes references
显示更多 [+] 显示较少 [-]In this experiment, 240 one-day-old broiler chicks were assigned to one of six dietary treatments in a completely randomized design. Each treatment replicated four times with 10 birds per replicate. The dietary treatments were: 1 and 2: diet without thyme extract (TE) with and without soybean oil (SO) for the entire period of the experiment; 3 and 4: 0.5% TE with and without SO for the entire period of the experiment; 5 and 6: 0.5% TE in last two weeks with and without SO. Supplementation of TE to the diets significantly decreased serum malondialdehyde concentration and increased gluthatione peroxidase activity (P<0.05). Adding TE to the diets also led to a significant reduction in serum cholesterol content (P<0.05) , but its effect on lightness, redness, yellowness, water holding capacity, cooking dripping loss of thigh meat was not significant (P>0.05). Thyme extract supplementation to the diets caused significant reduction in gut pH (P< 0.05), but its effect on relative length of gastrointestinal tract parts was not significant (P>0.05). Soybean oil addition to the diets did not have significant effect on malondialdehyde and cholesterol concentrations, and gluthatione peroxidase activity of broiler chicks' serum (P>0.05). As an overall conclusion, adding TE to the diets throughout the entire experimental period led to improvement in antioxidant status, reduction in gut pH and serum cholesterol of broiler chicks.
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