Генетика и разведение животных, 2019, № 4, С. 20-25
УДК 636.2:591.1 + 612.015.3
А. А. СОЛОМАХИН¹, О. С. МИТЯШОВА¹, Р. А. РЫКОВ¹, А. А. СМЕКАЛОВА¹, И. Ю. ЛЕБЕДЕВА¹
ДИНАМИКА ИЗМЕНЕНИЯ ПОКАЗАТЕЛЕЙ БЕЛКОВО-УГЛЕВОДНОГО ОБМЕНА В ПЕРВЫЙ ТРИМЕСТР ЛАКТАЦИИ У КОРОВ ЧЕРНО-ПЕСТРОЙ ПОРОДЫ В СВЯЗИ РЕПРОДУКТИВНЫМ ПОТЕНЦИАЛОМ
A. SOLOMAKHIN1, O. MITYASHOVA1, R. RYKOV1, A. SMEKALOVA1, I. LEBEDEVA1
DYNAMICS OF CHANGES IN INDICATORS OF PROTEIN-CARBOHYDRATE METABOLISM IN THE FIRST TRIMESTER OF LACTATION IN COWS OF THE BLACK PIED BREED IN RELATION TO DIFFERENT REPRODUCTIVE POTENTIALS
Abstract. In the present work, changes in indicators of protein-carbohydrate metabolism during the first trimester of lactation in Black Pied primiparous cows with different reproductive potentials were studied. Two weeks before calving and from the 1st to the 13th weeks after calving, cows were bled to determine the concentration of albumin and glucose, as well as the activity of the enzymes alanine aminotransferase (ALT) and aspartate aminotransferase (AST). After twelve months of lactation, the animals were divided into 3 groups: with an open days period of less than 100 days (group 1), with an open days period of more than 100 days (group 2), and animals that remained infertile for more than 365 days (group 3). The albumin concentration in the blood was reduced 1.1–1.2 times (p<0.05) from the 1st to the 5th week after calving in cows with the short open days period, but did not change significantly in animals of the other two groups. The glucose concentration decreased 1.5–1.7-fold (at least p <0.05) 1 week after calving in all groups. The blood ALT activity was the lowest after 1–3 weeks of lactation and increased 1.9 times (p<0.01) between the 3rd and 7th week in cows with the short open days period and 1.5 times (p 0.05) between the 1st and 13th week in long-term infertile animals. Concurrently, the ALT activity positively correlated with the albumin content in the blood of animals of all compared groups. The AST activity was increased 1.4–1.5 times (p<0.05) in the blood of cows of the 1st and 2nd groups 1–5 weeks after calving. In addition, this activity was negatively associated with the glucose concentration in animals with the short and long open days period and positively associated with the albumin concentration in long-term infertile animals. An analysis of the obtained time profiles for indicators of protein-carbohydrate metabolism in the dynamics of the first trimester of lactation points to the implementation of a certain sequence of changes in the balance of catabolic and anabolic processes in Black Pied primiparous cows with a high reproductive potential. Disturbance of this sequence leads to an attenuation of the reproductive function of animals associated with a prolongation of the open days period or with prolonged infertility.
¹ Федеральное государственное бюджетное научное учреждение «Федеральный научный центр животноводства — ВИЖ имени академика Л. К. Эрнста», 142132, Московская область, городской округ Подольск, поселок Дубровицы, д. 60