The effects of using different levels of (Ziziphora clinopodioides L.) medicinal plant on performance, egg traits, blood biochemical parameters and immunity cells in laying hens

This experiment was conducted with 180 Hy- line (W36) laying hens in 5 treatments and 3 replicates (with 12 hens in each replicate) from 60 until 72 weeks of age in a completely randomized design to evaluate the effects of using different levels of Ziziphora clinopodioides L. medicinal plant on performance، egg traits، blood biochemical and immunity cells in laying hens. The levels of Ziziphora clino L in this experiment were 0، 0. 5، 1، 1. 5 and 2 percentage. The results showed that the using of different levels of Ziziphora clino L medicinal plant has significantly effects on feed conversion ratio in laying hens (P<0. 05). The best feed conversion ratio (2. 72) was obtained by using 1% of Ziziphora clino L. Using 2% of Ziziphora clino L. significantly (3. 51) increased the feed conversion ratio. The results showed that the using of different levels of Ziziphora clino L medicinal plant have significant effects on egg quality of laying hens (P<0. 05). So، the highest amount of specific gravity (1. 080mg/ml3) and yolk color index (4. 84) were observed in group4 by using 1. 5 percent of Ziziphora clino L medicinal plant and the highest amount of egg albumin weight (43. 40g) was observed in group 1 (control group). The results indicated that there were significant difference between treatments on blood biochemical parameters of laying hens (P<0. 05). So، the lowest amount of glucose (111. 22mg/dl) and triglyceride (1242. 3mg/dl) were observed in group5 by using 2 percent of Ziziphora clino L medicinal plant and the lowest level of cholesterol (137. 52mg/dl) was observed in group1. Using different levels of Ziziphora clino L medicinal plant had no significant effects on the levels of immunity cells in laying hens (P<0. 05). The overall results showed that the using Ziziphora clino L to 1. 5% of laying hens diets without having any adverse effects of performance، improve their egg traits. The highest decrease in blood glucose and triglyceride were obtained by using 2% of Ziziphora clino L.