THE RELATIONSHIP BETWEEN PHYSIOLOGICAL BLOOD PARAMETERS AND FERTILITY IN HOLSTEIN COWS

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VAJDI S.; ZAMIRI M.J.; NAZIFI S.; ROUGHANI E.

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Journal: Iran Agricultural Research Year:2002 | Volume:21 | Issue:2 Page(s): 173-186

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Title

THE RELATIONSHIP BETWEEN PHYSIOLOGICAL BLOOD PARAMETERS AND FERTILITY IN HOLSTEIN COWS

Author(s)

VAJDI S. | ZAMIRI M.J. | NAZIFI S. | ROUGHANI E. | Issue Writer Certificate

Keywords

DAIRY COWSQ3

DAYS OPENQ3

PHYSIOLOGICAL PARAMETERSQ3

POST PARTUM PERIODQ3

Abstract

Relationships between physiological blood parameters and postpartum (PP) fertility (days open, and the number of artificial inseminations required per conception, AIPC) were studied in 15 Holstein cows. Serum concentrations of total proteins, globulin, aspartate aminotransferase (AA T) and phosphorus varied significantly during the first 95 days postpartum. Number of days' open and AIPC were not significantly affected by the uterine health and parity, but younger animals tended to have shorter DAYS OPEN, and required fewer AIPC (P<0.08). Serum phosphorus levels were significantly higher in younger cows, and phosphorus concentration on d 35 PP showed a significant but negative correlation (r=-0.70) with day (open and AIPC. For the cows with endometritis (n=8), the correlation coefficients of DAYS OPEN with serum glucose (r=0.89 on d 5 PP), AAT (r=0.76 on d 20 PP) and phosphorus (r=-0.72 on d 35 PP) were significant. For normal cows, the correlation coefficients of DAYS OPEN with serum glucose (r=-0.80 on d 95 PP), AAT (r=-0.75 on d 35 PP), phosphorus (r=-0.81 on d 35 PP), and blood hemoglobin (r=0.80 on d 20 to 50 PP) were significant (P<0.05). The only parameter which was significantly correlated with .days open, regardless of the uterine health status, was serum phosphorus on d 35 PP. Regression equations of DAYS OPEN on PHYSIOLOGICAL PARAMETERS were constructed. Although the number of animals in this experiment was small, but the regression equations were promising and it is suggested that more comprehensive studies should be undertaken for a better understanding of the relationship between PP fertility and PHYSIOLOGICAL PARAMETERS.

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APA: Copy

VAJDI, S., ZAMIRI, M.J., NAZIFI, S., & ROUGHANI, E.. (2002). THE RELATIONSHIP BETWEEN PHYSIOLOGICAL BLOOD PARAMETERS AND FERTILITY IN HOLSTEIN COWS. IRAN AGRICULTURAL RESEARCH, 21(2), 173-186. SID. https://sid.ir/paper/16146/en

Vancouver: Copy

VAJDI S., ZAMIRI M.J., NAZIFI S., ROUGHANI E.. THE RELATIONSHIP BETWEEN PHYSIOLOGICAL BLOOD PARAMETERS AND FERTILITY IN HOLSTEIN COWS. IRAN AGRICULTURAL RESEARCH[Internet]. 2002;21(2):173-186. Available from: https://sid.ir/paper/16146/en

IEEE: Copy

S. VAJDI, M.J. ZAMIRI, S. NAZIFI, and E. ROUGHANI, “THE RELATIONSHIP BETWEEN PHYSIOLOGICAL BLOOD PARAMETERS AND FERTILITY IN HOLSTEIN COWS,” IRAN AGRICULTURAL RESEARCH, vol. 21, no. 2, pp. 173–186, 2002, [Online]. Available: https://sid.ir/paper/16146/en

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