摘要 : In the present study the effect of trace elements of semen on freezing from four good and four poor freezable crossbred bulls were investigated. The mean concentration of copper (μg/ml), cobalt (μg/ml), zinc (μg/ml) and iron (μg/m... 展开 In the present study the effect of trace elements of semen on freezing from four good and four poor freezable crossbred bulls were investigated. The mean concentration of copper (μg/ml), cobalt (μg/ml), zinc (μg/ml) and iron (μg/ml) in the neat seminal plasma of good freezable semen was 0.874±0.092, 0.481+0.038, 10.519±0.648 and 48.98±3.09, whereas the corresponding concentration in the post-thaw semen samples was 0.084+0.011, 0.128±0.039, 2.282±0.241 and 15.73±1.06, respectively. Similarly, the concentration of the above trace minerals in the poor freezable bull semen was estimated to be 0.629±0.071, 0.341±0.037, 5.065±0.446 and 45.45±2.60 in neat and 0.066+0.009, 0.103±0.023, 1.993±0.251 and 19.00+1.01 in post-thaw semen samples Highly significant difference (P < 0.01) was observed between the semen samples of good and poor freezable bulls with respect to zinc, whereas the difference with respect to copper and cobalt was significant (P < 0.05) in the neat state. The post-thaw concentration of only iron registered significant difference between the good and poor freezable semen samples. 收起