بررسی اثرات استفاده از مخلوط گیاهان دارویی نعناع، آویشن و مرزه بر عملکرد، کیفیّت تخم مرغ و فراسنجه‌های بیوشیمیایی و ایمنی خون مرغ‌های تخم گذار

This experiment was conducted to evaluate the effects of different mixtures of peppermint, thyme and saturea medicinal plants on performance, egg quality and blood biochemical and immunity parameters of laying hens. experiment was conducted in a completely randomized design with 192 of laying hens in 4 treatments and 4 replicates (with 12 hen in each replicate) for 12 weeks and included: control group without using any medicinal plants, group 2 using 2% of medicinal plants (50% of peppermint, 25% thyme and 25% of saturea), group 3 (25% of peppermint, 50% thyme and 25% of sature) and group 4 (25% of pepermint, 25% thyme and 50% of sature). results showed that the use of different medicinal plants mixture has significant effects on performance, biochemical parameters, percent of hetrophlis and ratio of hetrophils to lamphosits (p < 0.05). the overall results of the present study indicate that in laying hens with using the mixture of medicinal plants like 3 experimental group, the improvement of performance, blood parameters and immunity level is possible.