Agrarian Bulletin of the Urals

The journal has been published since 2000

ISSN 1997 - 4868 (Print); ISSN 2307-0005 (Online)

 

Estimation of plastic resources of the organism of heifers in the early postnatal development period

Authors:

A. R. TAIROVA, doctor of biological sciences, professor,

V. R. SHARIFYANOVA, senior teacher,

G. V. MESHCHERYAKOVA, candidate of biological sciences, associate professor,

SOUTH URAL STATE AGRARIAN UNIVERSITY (13 Gagarin Str., 457100, Chelyabinsk Region, Troitsk),

I. M. DONNIK, doctor of biological sciences, professor, academician of RAS, rector,

O. A. BYKOVA, doctor of agricultural sciences, professor,

URAL STATE AGRARIAN UNIVERSITY (42 K. Liebknechta Str., 620075, Ekaterinburg)

Abstract. Adaptation of organisms to inadequate environmental conditions is one of the most important and unsolved problems for both biology and veterinary medicine. Its solution is possible only on the basis of deep understanding of the natural mechanisms of resistance to adverse environmental factors. The article presents data on the study of the protein blood spectrum of the calves of the early postnatal period of development in the conditions of the technogenic agroecosphere. It was established that the concentration of total protein in the blood of the calves during the entire observed period varied slowly and was within the lower values of the physiological norm. An analogous regularity is characteristic for the dynamics of albumins – proteins, which carry out transport and construction functions. The level of this protein fraction throughout the experimental period increased gradually and was also within the lower limits of the physiological norm. The es- tablished nature of the content of albumin fractions indicates that albumins in the body of the calf are intensively consumed as a result of the activation of body reserves. Analysis of the dynamics of the globulin fraction revealed that the concentration of globulins decreased by 28,95–30,9 % (P < 0.01) and by the end of the experiment (3-month old age) increased by 37,02 % (P < 0.01) in the comparison with the baseline. The activity of aspartate aminotransferase in the studied heifers varied from 1329,13 nkat/l (10 days old) to 1382,98 nkat/l at the norm of 483,0–1317,0 nkat/l. Against this background the alanine aminotransferase activity gradually increased during the entire experimental period from 435.39 nkat/l (10 days old) to 474.53 nkat/l (30 months old) at reference values, equal to 233.0–650.0 nkat/l. Revealed changes in the protein status of the female calves show that the delay in the biosynthesis of proteins that perform the function of immunobiological resistance in the organism of the heifers of the early period of postnatal development leads to the involvement of amino acids in indirect deamination and reamination.

Keywords: heifers, blood, heavy metals, adaptive possibilities, technogenic agroecosphere.

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