Volume 12, Issue 34 (12-2021)                   rap 2021, 12(34): 52-59 | Back to browse issues page

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Departmemet of Animal Science, Islamic Azad University, Maragheh Branch, Maragheh Iran
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Extended Abstract
Interoduction and Objective: The use of food additives in the diets of farm animals such as poultry has an important role in improving the level of their health, increasing the amount of their products and improving their products quality. Nowadays, feed additives prepared from microbial products and medicinal plants are among the common additives used in feeding of broiler chickens. These products don’t have any adverse effects on broiler health, and their use in the diet of broilers has been welcomed by consumers.This experiment was conducted to investigate the effects of antibiotic, symbiotic, pepermint powder and mixture of symbiotic and pepermint powder on performance, carcass traits and blood parameters of broilers.
Material and Methods: In this experiment 240 Ross 308 broilers were used in 5 treatments, 4 replicates and 12 chicks in each replicate in two experiment period include: growth (11 to 24 days), and finish (25-42 days), in a completely rondomised design. Experimental diets included: 1) control group (without any additives), 2) antibiotic (100 ppm.kg diet), 3) symbiotic (0.5 and 0.25 g.kg diet in growth and finish periods), 4) pepermint powder (1% of diet), and 5) symbiotic (0.5 and 0.25 g.kg diet in growth and finish periods) + peppermint (1% of diet).
Results: The results showed that in growth period, using of pepermint powder significantly reduced the amount of final weight (p<0.05). In finish period, all additives in contrast to control group, increased the amount of daily weight gain and improved feed conversion ratio (p<0.05). In totall experiment period, all additives increased the amount of daily weight gain (p<0.05). Experimental groups had no effects on the amount of daily feed intake. Experimental groups incontrast with control group, significantly reduced the amount of bours fabrisious relative weight (p<0.05). So, the the lowest relative weight blonged to peppermint treatment, whereas the highest it blonged to control group. Symbiotic + peppermint group significantly reduced the level of blood LDL (p<0.05).
Conclusion: Finally using of feed addtives in diets of broiler chicks such as current experiment recommended doses can be having benifical effects on their performance, immunity and blood parameters.
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Type of Study: Research | Subject: تغذیه طیور
Received: 2021/05/11 | Revised: 2022/02/5 | Accepted: 2021/06/28 | Published: 2022/02/2

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