Effects of Astragalus, Epimedium, and Fructus Ligustri Lucidi extractive on antioxidant capacity, production performance, and immune mechanism of breeding pigeons under stress oleh Xue Zhang, Shuo Zhou, Yayan Liang, Gaijie Xie, Mingqiang Zhu, Zifan Wang, Qing Qu, Yifei Long, Yantao Lv, Jie Peng, Yaohui Yuan, Yanhua Huang, Wei Wang