Tarbiat Modares University Journal of Agricultural Science and Technology 1680-7073 15 1 2013 01 01 Effects of Aflatoxin on the Performance of Broiler Breeders and Its Alleviation through Herbal Mycotoxin Binder 55 63 15202 EN M. Manafi Department of Animal Science, Faculty of Agricultural Sciences, Malayer University, Malayer, Islamic Republic of Iran. H. Khosravinia Department of Animal Science, Faculty of Agricultural Sciences, Lorestan University, Khoramabad, Islamic Republic of Iran. Journal Article This study was conducted to investigate the effect of Aflatoxin B<sub>1</sub> (AFB<sub>1</sub>) on performance and egg quality in broiler breeders and the abatement of its deteriorative effect through its counteraction with Herbal Mycotoxin Binder (HMB). Thirty-six, 28-wk-old broiler breeder hens were allotted to one of the three treatments of: (1) basal diet (control),(2) control plus 500 μg kg<sup>-1</sup> AFB<sub>1</sub> and (3) control diet plus 500 μg kg<sup>-1</sup> AFB<sub>1</sub>+0.2%HMB for three periods, each of a duration of three weeks and when from 28 to 36 weeks of age. Results revealed that 500 μg kg<sup>-1</sup> AFB<sub>1</sub> significantly (P< 0.05) reduced feed consumption, feed efficiency, egg production as well as egg weight. Supplementation of HMB partially restored feed consumption and egg production alleviating some side effects of AFB<sub>1</sub>. Aflatoxin B1 Breeder hens Internal egg parameters Performance Parameters https://jast.modares.ac.ir/article_15202_e65d4c415d8f7f41751b1c0415f03eae.pdf