EFFECTS OF COPPER SULFATE ON REPRODUCTIVE HORMONE LEVEL DURING ESTROUS CYCLE IN SIMMENTAL HEIFERS
WANG Cong HUANG Ying-xiang DONG Kuan-hu LIU Qiang HUO Wen-jie(College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu,Shanxi 030801)
J4 . 2008, (02): 228 -232 .  DOI: 10.11869/hnxb.2008.02.0228