مقايسه اثر اسانس ميخك، آنتي‌بيوتيك ويرجينامايسين و پروبيوتيك پروتكسين بر عملكرد، فراسنجه هاي خوني، جمعيت ميكروبي و بافت شناسي روده كوچك جوجه هاي گوشتي

Comparison of the effect of Dianthus extract, Protexin probiotic and Virginiamycin on performance, blood metabolites, microbial community and intestine histopathology of broilers

اين پژوهش با هدف بررسي اثر آنتي بيوتيك ويرجينامايسين، اسانس ميخك و پروبيوتيك پروتكسين بر عملكرد، فراسنجه هاي خوني، جمعيت ميكروبي و بافت شناسي روده كوچك جوجه هاي گوشتي انجام شد. براي اين منظور240 قطعه جوجه‌ نر گوشتي سويه راس 308 در 40 واحد آزمايش با 6 تيمار و 4 تكرار 10 قطعه-اي در قالب طرح كاملا تصادفي توزيع شدند. تيمارها شامل: جيره پايه (شاهد)، دو گروه آزمايشي تغذيه شده با جيره شاهد و افزودن 0/02 درصد آنتي‌بيوتيك ويرجيناماسين و پروبيوتيك پروتكسين و سه گروه آزمايشي تغذيه شده با جيره شاهد و سطوح 150، 300 و 450 ميلي‌گرم دركيلوگرم جيره، اسانس ميخك بودند. نتايج نشان داد كه تيمارهاي حاوي آنتي بيوتيك، پروبيوتيك و سطوح 150 و 300 ميلي‌گرم اسانس ميخك وزن زنده، ضريب تبديل خوراك، وزن نسبي لاشه، سينه و ران را به طور معني‌دار بهبود بخشيدند (0/05

This experiment was conducted to investigate the effects of dietary dianthus extract, virginiamycin and Protexin probiotic on the growth performance, blood metabolites, microbial community and small intestine histopathology of male broilers from 1 to 42 days of age. A total of 240 Ross male broilers were randomly distributed to 24 experimental units and 6 dietary treatments (4 replicates with 10 birds in each).Treatments were included control (basal diet), basal diet+Virginiamycin antibiotic, basal diet+ Protexin probiotic, basal diet + 100 mg dianthus extract, basal diet + 300 mg dianthus extract and basal diet + 450 mg dianthus extract per kg of diet.The result showed that the average body weight gain of broilers fed with Virginiamycin, Protexin, 150 and 300 mg dianthus extract was significantly more and feed conversion ratio was less than control group in all periods ( P <0.05). The relative weights of carcass, breast and leg were improved by all treatments except for 450 mg dianthus extract. The relative weights of liver, Bursa and spleen were increased by all treatments. The serum concentration of cholesterol and LDL were decreased by Protexin and all levels of dianthus extract. All treatments increased Lactobacillus bacteria and decreased Escherichia coli bacteria except Virginiamycin treatment. Villus height and width increased and crypt depth decreased by all supplementation. All treatment groups increased blood lymphocyte, decreased heterophile and improved heterophile to lymphocyte ratio. Based on these results, Protexin and dianthus extract up to 300 mg/kg of diet may be good replacement for antibiotic to improve broiler performance and immunity.