The article discusses the issues of mathematical modeling and processing of cardiointervalogramms of cows with different vegetative regulation. An analysis of the sinus rhythm with subsequent mathematical processing of statistical parameters is presented. The work examines the variational pulsograms of an experimental group of animals, using correlation rhythmography, analyzes the scattergrams, autocorrelation clouds in cows with different levels of vegetative regulation. Studies of heart rate variability indicators for Jersey breed cows are relevant. This is a unique method that allows one to take into account the breed characteristics of cattle, predict milk productivity and increase the period of economic use. The stress index is an indicator that most fully informs about the degree of tension of the body's compensatory mechanisms, as well as about the level of functioning of the central circuit of the regulation of heart rhythm. Based on the stress index, the initial vegetative tone was calculated.

военным ветеринарным фельдшером артиллерийской батареи 52-го кавалерийского полка. В 1945 окончил Военноветеринарную академию (сейчас Московская государственная академия ветеринарной медицины и биотехнологии имени К. И. Скрябина). Демобилизовавшись из армии, с 1948 работал в лечебно-ветеринарных учреждениях Московской области, был старшим научным сотрудником Всесоюзного института экспериментальной ветеринарии (ВИЭВ). С 1953-кандидат биологических наук. С 1957 жил и работал в Курске. Был первым заведующим кафедры физиологии и зоогигиены со дня её основания (1957) и до конца жизни (1983), деканом зоотехнического факультета Курского сельскохозяйственного института, начальником областного управления сельского хозяйства. В течение ряда лет работал советником в КНДР и Китае, экспертом ООН по вопросам высшего образования. А. А. Сысоев был депутатом Верховного Совета РСФСР 7-го созыва, Курского областного Совета. Под его руководством выполнены и защищены 2 докторских и 7 кандидатских диссертаций. С 1962 по 1973-ректор Курского сельскохозяйственного института, профессор. В 1963 стал доктором биологических наук. Автор 150 научных работ, среди которых учебник по физиологии сельскохозяйственных животных, 14 книг и монографий, 3 практикумов по физиологии сельскохозяйственных животных. Дважды награжден Орденом Трудового Красного Знамени, Орденом «Знак Почета», Орденом Государственного знамени КНДР. В 2019 году в Курской сельскохозяйственной академии состоялась Всероссийская научно-практическая конференция, посвященная 100-летию со дня рождения профессора А.А. Сысоева. ПОСВЯЩАЕТСЯ памяти видного советского ученогофизиолога, профессора, педагога, общественного деятеля Александра Ануфриевича Сысоева

For several years, strengthened state support caused a situation, when domestic livestock has reached the European level on many qualitative and quantitative parameters. At the same time, dairy cattle breeding remains one of the most problematic branches. Intense loads during economic use lead to a decrease in vital energy and functional and physiological reserves of the body. The problem of reducing the economic characteristics of cows with age is relevant. In this regard, many questions related to the need to preserve these functional reserves arise and the latter can be studied using non-invasive methods. One of such methods is cardiointervalometry of heart rate variability. The method allows evaluating the physiological state of the animal, which can be influenced by both exogenous and endogenous factors.

The article reveals the possibilities of cardiointervalometry using the modern complex electrophysiological laboratory “CONAN - 4.5”. In modern economic conditions, the intensification of animal breeding requires deep and all-sided knowledge of many sciences, especially biology and physiology. The body of an animal consistently undergoes interrelated morphological, biochemical and functional changes that provide functional reserves such as energy, metabolic and informational resources. The adaptation mechanisms and cattle economic use duration in modern conditions of industrial production of livestock products depend on the nature and severity of these reserves. The estimation of slow and fast-wave components of variability of the cardiointervals is carried out - the numerical values of A. Kaplan’s parametres of heart rate variability (respiratory modulation index (RMD), sympathoadrenal tonus index (SATI), slow wave arrhythmia index (SWAI)) of Jersey cows, which reflect the activity of the sympathetic and parasympathetic vegetative nerve system. Mathematical processing of heart rate variability with application of R.M. Baevsky’s method was used in the study. The test group of Jersey cows was divided into subgroups based on the tension index, and initial vegetative statuses were established on its basis. The distribution of the studied group of Jersey cows based on the tension index of regulatory systems was confirmed by statistical processing using the classification matrix, which was 91.26% and with the square degree of Mahalonobis distance D2 between the groups. The obtained statistically processed data in the course of the scientific research have true meaning. In this work, the analysis of the obtained numerical values of of A.Ya. Kaplan’s parametres was carried out and the relationship between the initial vegetative tonus of Jersey cows and the obtained values was considered.

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