The Effects of Vitamin E，Beta-carotene and Zinc on Testosterone，Cytokine and Immune Function of Holstein Bull in Hot Weather
LI Qiu-feng，LI Jian-guo，GAO Yan-xia，CAO Yu-feng，LI Yun-qi，FENG Zhi-hua，MA Ya-bin，WU Yun-hai，LIU Xing-hua
ACTA VETERINARIA ET ZOOTECHNICA SINICA . 2014, (3): 410 -416 .  DOI: 10.11843/j.issn.0366-6964.2014.03.010