Email this article The effect of Rosmary on performance, blood parameters, and quality of broiler carcasses
Abstract
This experiment was performed to evaluate different levels of rosemary on performance, blood parameters, and broiler carcass quality. For this purpose, 180 one-day-old Ross 308 one-day-old broilers were used based on a completely randomized design in 4 treatments, 3 replications, and one pen containing 15 broiler chickens in each replication. Experimental treatments included control (0), 0.5, 1 and 2% of rosemary leaf powder in chickens' diets. During the experimental period, the chickens had free access to water and feed, and the breeding management in terms of exposure, humidity, ventilation, and vaccination was done according to the Ross 308 strain requirements guide. The weighing was done weekly and at the end of the feeding period, weight gain and conversion ratio of chickens were measured. At 42 days of age, 2 chicks with the lowest mean weight difference were selected from each replication to be used to evaluate the quality performance of broiler carcasses. To draw blood during 21 and 42 days of age, one bird was randomly selected from each replicate and killed. Daily weight gain, feed conversion ratio, liver percentage, intestinal percentage, cholesterol, and glycerol were significantly affected and there was a significant difference between treatments (P <0.05). However, feed intake, glucose, and other carcass components did not differ significantly between treatments (P> 0.05) but had a positive effect on the control treatment. Overall, the results showed that adding rosemary to the diet of broilers can improve performance and increase the effective quality of carcasses in broilers.
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