The correlation between blood metabolic and reproductive performance on the Holstein-Friesian crossbred dairy cows

This research was conducted to investigate the correlation between blood metabolic and reproductive performance on the Holstein-Friesian crossbred. Twenty cows on the second to the third lactation were used in this research. The blood was collected through a jugular vein, eight hours after feeding; it was used for investigating serum protein, glucose, and estradiol. The reproduction including service per conception (S/C), postpartum mating (PPM), and calving interval (CI). The data were analyzed using the Pearson Correlation Model. The average of serum protein, glucose, and estradiol concentration were 7.17±0.86 g/dl; 56.14±4.56 mg/dl; and 4.97±0.75 pg/mL respectively. The average of PPM, CI, and S/C were 150.40±69.85 d; 433.60±106.01 d; and 1.6±0.75 t respectively. The results showed that the correlation coefficient of the estradiol on serum protein and serum glucose were 0.309 and 0.329 respectively. The correlation coefficient of serum protein on PPM, S/C, and CI were-0.096;-0.333;-0.134 respectively. While that of serum glucose on PPM, S/C, and CI were-0.109;-0.327; and-0.309 respectively. Serum protein and glucose had a negative correlation on S/C, PPM and CI.