The use of biochemical blood markers for early prediction of the intensity of live weight gain of calves

The aim of the research was to identify promising biochemical markers blood associated with intensity live weight gain in young cattle. work carried out 2021...2022 conditions dairy farm LLC Severnaya Niva Kortkerossky district Komi Republic. A group newborn heifers Kholmogorsky breed (n = 30) selected for experiment. It has been established that on first day after birth, calves intensive growth rates had lower AsAT activity (r -0.510) and iron concentration -0.650) serum, vice versa a higher level SMLMM рlasma (0.626). At later stages analysis, pronounced correlation body observed respect alkaline phosphatase: -0.639 -0.744 7 14, respectively. determined many calculated coefficients obtained during test 14th birth more noticeable growth. Such included: Alkaline phosphatase/Calcium (-0.746), phosphatase/Magnesium (-0.756), Magnesium/Alkaline Phosphatase (-0.760), Calcium×Phosphorus/Alkaline (0.758) Phosphatase/(Calcium+Magnesium) (-0.753). next stage, analysis rate ranked by increase values developed out. is proved use contributed differentiation comparison one phosphatase. Thus, index phosphatase/Calcium/ Magnesium 1st, 7th days postnatal ontogenesis provided difference between phenotypes 1st 3rd groups 74.1(P≤0.05), 92.6 (P≤0.01) 90.7 (P≤0.001) g per day, whereas when using phosphatase 33.3; 16.0 12.2 % less. these predict can accuracy selection animals desired phenotype early ontogenesis.