İn ovo Vitamin C ve E Enjeksiyonunun Isı Stresine Maruz Kalan Etlik Piliçlerde Gelişme Performansı ve Oksidatif Stabilite Üzerine Etkileri

Abstract

This study was conducted to evaluate the protection probability of in ovo injection of vitamin C and E against oxidative stress to chicks due to hatching and to determine the effects of early age heat stress on performance and oxidative stability of broilers obtained from in ovo vitamin C and E injected eggs. For this purpose, fertile eggs except control group were injected with 20 IU vitamin E, 3 mg vitamin C and 20 IU vitamin E+3 mg vitamin C on the 17th day of incubation. The control chicks were assigned to 2 groups after hatching (control and heat stress) and 5 groups (control, heat stress, heat stress+vitamin C, heat stress+vitamin E and heat stress+vitamin C+E) were created each with 4 replicates (18 chicks). Heat stress groups were exposed to 38±1 0C for 4 h every day at ages of 1 to 7 d. Exposing chicks to heat stress at an early age did not significantly affect body weight, feed intake and feed conversion ratio at 42 d. It was determined lower malondialdehide (MDA) levels and higher superoxide dismutase (SOD) activity in chicks hatched from in ovo vitamin C and E injected eggs compared to the control group. After 1 day, it was observed lower creatine kinase (CK) and MDA levels but higher trolox equivalent antioxidant capacity (TEAC) value. It was concluded that in ovo injection of vitamin C and E is an effective mean of protection from lipid peroxidation in newly hatched chicks and from adverse effects of heat stress early in life.