Effect of Thymolina on the Performance and Carcass Characteristics in Ross 308 Broiler Chickens

In the present experiment, 320 one day old Ross 308 broiler chickens were used based on a completely randomized design with 4 treatments, 4 replicates, and each replicate is a pan containing 20 broiler chickens. Experimental treatments include control, 0.5, 1, and 2 percent in chickens' diet. Thymolina is an anti-bacterial powder drug which is made by composing 4 medicinal plants. During the experiment period, chickens had free access to water and food and the livestock raising management was conducted in terms of lighting, humidity, ventilation, and vaccination in accordance with the guide requirements of Ross 308 broider chickens. Weighing was conducted weekly and at the end of feed intake, weight gain and feed conversion ratio of chickens were measured. At the age 42 days old, from each replicate, 2 chickens with the lowest mean difference in weight were selected in order to be used for factors of carcass weight, the amount of fat as well as pectoral muscle and small intestine to obtain histological Morphology. The amount of consumed feed weight gain, body weight, feed consumption, feed conversion ratio was significantly affected and there is significant differences among different treatments (P<0.05), but feed conversion ratio (finisher and total) was not affected and there was no significant difference among different treatments (P>0.05). The amount of carcass fat in treatments containing Thymolina was decreased and was not affected and there was no significant difference among different treatments (P>0.05). In general, results indicated that using Thymolina in the diet of broiler chickens causes improvements in performance characteristics. Therefore, it can be used for the improvement in performance and creation of the favorable broiler chickens.