The relevance of urine pH detection in the prognosis of cow postpartum [hypocalcaemia] and factors [influencing] this correlation | Urīna pH noteikšanas nozīme govju pēcdzemdību hipokalcēmijas prognozēšanā un to ietekmējošie faktori
2018
Putnina, S., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Veterinary Medicine | Lisovska, M., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Veterinary Medicine | Liepa, L., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Veterinary Medicine
Postpartum hypocalcaemia (hypoCa) is a pressing issue in many dairy farms in Latvia. The aim of the research was to find out the link between pre-calving day (PD), urine pH (pH), and the body condition score (BCS) and post-calving serum calcium concentration (Ca) of cows. The experimental animals were chosen from farms with hypoCa problem: from the herd OP 16 cows; the herd S-12, the herd T-15. Only OP used anionic diet (AD) in dry cows’ feeding. Twenty to five days before calving, cows’ BCS, pH were measured by the pH-meter “Mettler Toledo LE407” and the pH-strips “Papierki pH 5.5-8.0”. On the calving day, Ca was measured again. Statistical data were analysed by MS Excel, SPSS17. The measurements of the H-meter were more precise (p is less than 0.05) than the pH-strips. A correlation was found between pH and Ca on S, T (r=0.54; r=0.51) where AD was not present. The PD correlated (r=0.56) with urine pH on OP, S. Correlations between Ca and BCS on OP, T (r=-0.51; r=-0.68); between pH and Ca on OP were established. Cows with hypoCa (less than2.1 mmol LE-1) had significantly (p is less than 0.01) higher pH than cows with normal Ca. AD in cows before calving on OP causes pH below 6.5, but after calving there is normal Ca. In herds without AD, the pH below 6.5 does not guarantee normal Ca. It is influenced by PD of pH measurement, dry cow diet, BCS. The study is part of the State Research Project (AgroBioRes) VP29.
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