تأثیر پودر زنجبیل، گزنه و مخلوط هر دو بر عملکرد تولیدی، فراسنجه های خونی و خصوصیات لاشه جوجه های گوشتی

This experiment was conducted to investigate the effect of ginger and nettle powders and their mixture in comparison with antibiotic growth promoter in a completely randomized design with 5 treatments, 4 replicates and 8 chicks per replicate in commercial broilers. The experimental treatments were:1) control (with no additive); 2) basal diet with 0.04% tetracycline antibiotic growth promoter (50% mixed in feed); 3, 4 and 5): basal diet with 1% ginger powder, 1% nettle powder and 1% of mixed ginger powder and nettle powder, respectively. The results showed that the highest weekly weight gain in the period of 21-35 days was related to the treatment group of 0.04% antibiotic growth promoter followed by the treatment group containing 1% nettle powder, which was statistically significant when compared with other dietary treatments (P< 0.05). In conjunction with the increased feed consumption in the period of 1-7 days of age, treatment groups with 1% ginger powder showed the highest value with statistically significant difference among other experimental groups (P< 0.05). In the sixth week of trial, treatment containing 1% ginger powder resulted in significant reduction in blood cholesterol levels compared to other experimental groups (P< 0.05). With regard to carcass characteristics, feed conversion ratio and other blood parameters no significant changes was noticed among all treatments in different week intervals (P>0.05). According to the archived results, ginger powder and nettle powder and their mixture can be considered as a relatively suitable alternative to antibiotic growth promoters for improvement of broiler performance.