NATURAL SCIENCES

Journal of fundamental
and
applied researches

Effect of l-tyrosine treatment on reproductive and productive performance of dairy cows

2017. №4, pp. 177-182

Abubakr Abdelwahab Ahmed Tantavi Abuelkassem - postgraduate student, Kuban State Agrarian University of I.T. Trubilin's name, 13 Kalinina Str., Krasnodar, 350044, Russian Federation, kasem1988bakr@gmail.com

Ryadchikov V.G. - D.Sc. (Biology), Professor, Academician of the Russian Academy of Sciences, Kuban State Agrarian University of I.T. Trubilin's name, 13 Kalinina Str., Krasnodar, 350044, Russian Federation, ryadchikovv@mail.ru

Shlyakhova O.G. - Ph.D. (Biology), Associate Professor, Kuban State Agrarian University of I.T. Trubilin's name, 13 Kalinina Str., Krasnodar, 350044, Russian Federation, ganch3030@mail.ru

Komarova N.S. - postgraduate student, Kuban State Agrarian University of I.T. Trubilin's name, 13 Kalinina Str., Krasnodar, 350044, Russian Federation, ninastas@yandex.ru

The article presents a review of the study on the effect of L-tyrosine on the on the productive and reproductive function in dairy cows. Protein is important nutrient and vital constituent of animal body and is continuously needed in the feed stuffs. The amino acids constituent of the proteins are required for diversity functions. The treatment by some amino acids, especially tyrosine led to significant improve in productive and reproductive performance. Tyrosine is an aromatic amino acid derived in the body from the essential amino acid phenylalanine by the action of phenylalanine hydroxilase enzyme. Tyrosine is necessary for the synthesis of catecholamines (adrenaline, noradrenalin and dopamine), thyroxine and protein. In addition, it has an important role in the citric acid cycle and building of melanin. Many studies have shown that there is a strong correlation between the level of some amino acids in the blood and reproductive performance.

Key words: оплодотворяемость, L-тирозин, беременность, гонадотропные гормоны, fertility, L-tyrosine, pregnancy, gonadotropic hormones