Effect of a Phytogenic additive on the growth performance, blood metabolites and immune response of broiler chickens fed different levels of protein
Message:
Abstract:
A total number of 288 one-day-old male broiler chicks (Ross 308) were used for 42-d period to investigate the effect of different levels of dietary protein and phytogenic supplementation in the corn-soybean meal based diet on performance, blood biochemistry and antibody response. This experiment was conducted in a completely randomized design as factorial experiment (3 × 2) with 4 replicates. Treatments consisted of three levels of protein (recommended, 1.5 and 3 % lower than recommended level) and 2 levels of phytogenic supplementation (0 and 0.1 % of diet). Mean feed intake, weight gains, feed conversion ratio were determined at 10, 24 and 42 days of age. Antibody titers against Newcastle and infectious bronchitis disease viruses were determined by haemagglutination and Elisa tests, respectively, at 27 and 35 days. Blood samples were collected to determine some serum biochemical parameters. The results showed that the use of low-protein treatment (3 % lower than recommended level) in comparison with normal-protein diets reduced body weight gain and secondary antibody response to Newcastle and infectious bronchitis viruses and increased feed conversion ratio and blood triglycerides levels (P < 0.05). The effect of phytogenic supplementation on performance parameters and blood biochemical parameters were not significant. However, phytogenic supplement significantly increased primary antibody tire against Newcastle vaccine (P<0.05). Significant interaction between dietary protein and phytogenic supplement was observed in term of secondary antibody tire against Newcastle vaccine, so that adding phytogenic supplement to the 1.5 % lower dietary protein improved the antibody response (P<0.05). Moreover, the serum cholesterol level was significantly decreased when phytogenic supplement was included in the low-protein diet. According to the results of current study, the use of phytogenic could only improve the antibody response and cholesterol metabolism in low-protein diet based on corn-soybean meal diet.
Article Type:
Research/Original Article
Language:
Persian
Published:
Iranian Veterinary Journal, Volume:14 Issue: 60, 2018
Pages:
14 - 27
magiran.com/p1896966  
برخی از خدمات از جمله دانلود متن مقالات تنها به مشترکان مگیران ارایه می‌گردد. شما می‌توانید به یکی از روش‌های زیر مشترک شوید:
اشتراک شخصی
در سایت عضو شوید و هزینه اشتراک یک‌ساله سایت به مبلغ 300,000ريال را پرداخت کنید. همزمان با برقراری دوره اشتراک بسته دانلود 100 مطلب نیز برای شما فعال خواهد شد!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی همه کاربران به متن مطالب خریداری نمایند!
توجه!
  • دسترسی به متن مقالات این پایگاه در قالب ارایه خدمات کتابخانه دیجیتال و با دریافت حق عضویت صورت می‌گیرد و مگیران بهایی برای هر مقاله تعیین نکرده و وجهی بابت آن دریافت نمی‌کند.
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.