Tanm işletmeleri Genel Müdürlüğü Samsun Gelemen Tarım işletmesinde 12 baş Siyah Alaca ve Karaköy Tarım işletmesinde 13 baş Jersey ineğin kan plazması Zn, Ca, Mg, K ve Cu düzeyleri ile gebelik arasındaki ilişkiler belirlenmiştir. Kan plazması çinko (Zn) düzeyleri gebe kalan Jersey ineklerde 32.56±1.94 $\mu$ mol/1, gebe kalmayanlarda 26.57±0.94 $\mu$ mol/1 (P

In this study, 12 Holstein cows at Samsun Gelemen State Farm and 13 Jersey cows at Karaköy State Farm were used. The aim of the study was to determine blood plasma Zn, Ca, K, Mg and Cu levels of conceived and non-conceived cows. Blood plasma Zn concentrations .were, for Jersey cows 32.56±1.94 $\mu$ mol/1 in conceived and 26.57±0.54 $\mu$ mol/1 in non-conceived Jersey cows, while the same values in Holstein cows were 31.82±1.77 and 27.19 $\mu$ mol/1 respectively. The results show that plasma Zn concentrations are higher in cows conceived than those in cows non-conceived. Additionally blood plasma K/Zn and Cu/Zn ratios in both breed significantly differed (P<0.01) between conceived and non-conceived cows.