تأثير تزريق درون تخم‌مرغي نسبت‌هاي مختلف ال-آرژنين به ال-ليزين بر رشد بدن، توليد ماهيچه و غلظت متابوليت‌هاي خون جوجه‌هاي گوشتي يك روزۀ راس

Effect of in ovo injection of different ratios of L-arginine to L-lysine on body growth, muscle production, and blood metabolites concentration of day old Ross broiler chicks

هدف از اين پژوهش، ارزيابي تأثير تزريق درون تخم‌مرغي نسبت­ هاي مختلف ال- آرژنين به ال- ليزين بر رشد بدن، توليد ماهيچه و غلظت متابوليت­ هاي خون جوجه­ هاي گوشتي يك روزۀ سويۀ راس بود. شمار 210 تخم‌مرغ بارور مادر گوشتي راس 308 در قالب طرح كامل تصادفي با هفت گروه آزمايشي و هر گروه داراي سي تخم­ مرغ انفرادي استفاده شدند. تيمارهاي آزمايشي شامل شاهد (بدون تزريق)، شاهد-شم (تزريق آب مقطر سترون يا استريل) و تزريق محلول‌هاي نسبت‌هاي 75/7، 80/7، 85/7، 90/7 و 95/7 درصد اسيدآمينۀ ال- ‌آرژنين به ال- ‌ليزين داشتند. پس از تفريخ، جوجه‌ها وزن‌كشي و نمونه‌هاي خون آن‌ها گرد‌آوري شد. سپس جوجه‌ها كشتار و وزن اجزاي لاشۀ آن‌ها اندازه‌گيري شد. بنا بر نتايج اين آزمايش، بالاترين درصد جوجه درآوري در نسبت 90/7 درصد ال- آرژنين به ال- ليزين مشاهده شد (0/01

The aim of this research was to evaluate the effect of in ovo injection of different ratios of L- arginine to L- lysine on body growth, muscle production and blood metabolites concentration of day old Ross broilers chicks. A total of 210 fertile Ross 308 broiler breeder eggs were used in a completely randomized design with seven experimental groups of 30 individual eggs in each treatment. The experimental treatments included: sham-control (sterile distilled water injected), control (non-injected), and injection of solutions with 75.7, 80.7, 85.7, 90.7 and 95.7 percent L-arginine to L-lysine ratios. On hatching, the chicks were weighed and their blood samples were collected. Then, chicks were euthanized and their carcass traits were weighed. According to the results of this study, the maximum hatchability percentage was observed in 90.7 percent of L- arginine to L- lysine ratio. The results also showed that the in ovo injection of different L- arginine to L- lysine ratio up to 90.7 percent resulted in significant increase in chick weight (P< 0.01), relative weight of scalped carcass (P< 0.01), carcass efficiency (P<0.01), thigh relative weight (P< 0.05), breast muscle relative weight (P< 0.01) and relative weight of liver (P< 0.05), whereas blood plasma urea concentration was significantly (P< 0.05) decreased. In overall, results indicated that in ovo injection of 90.7% L-arginine to L-lysine ratio is an advisable ratio for improving muscle growth, blood serum metabolite concentrations, and hatchability percentage of broilers.