Evaluation the quality of different mineral-vitamin premixes in performance of laying hens

This study was conducted to evaluate the quality of different mineral- vitamin premixes in performance of laying hens. This experiment was performed with one hundred and ninety two Hay-line W-36 laying hens from 70 to 80 weeks in a completely randomized design. Experimental groups were include ration without using of mineral-vitamin premixes (control), and three brands of mineral-vitamin premixes including Aras Bazar, Tolidaru and Darosazan. For 10 week. There were not significant differences in performance and egg quality among experimental groups (P>0.05). The overall results of the present study indicate that it's possible to remove dietary mineral and vitamin supplements from laying hens diets in late laying period without any adverse effects on performance and egg quality.