The effect of feeding ration on the biochemical status and morbidity of heifers and highly productive cows

This paper presents the results of clinical, biochemical and pathological studies of dairy cows and heifers with the same type of feeding. The study revealed: a significant metabolic disorder, dysfunction of the neuroendocrine system, as well as a high content of urea and urea nitrogen in newborn cows, which were 8.6 ± 0.5 mmol / L and 3.77 ± 0.23 mmol / L, respectively . The level of reserve alkalinity in the blood was lower than the normative indices in 90% of the studied animals and was in the range 38.33 ± 3.12 - 40.32 ± 4.66 vol /%. The albumin content was below normal in 40%, cholesterol also in 40%, and triglycerides in 45% of the studied animals. Acid-base balance shifted towards acidosis. This state in the body led to a decrease in the synthesis of albumin in the liver, a decrease in its antitoxic function, a decrease in sugar, and an increase in the number of ketone bodies in the animal body. Clinical examination of the cows we studied revealed bursitis on the pelvic limbs and hock arthritis in 12% of animals, in 43% - average fatness below normal, ruffled and dull coat, shortening of the last rib was noted in 6% of animals and cartilaginous growths were felt on it tissue. During the movement of animals, lameness and lethargy of gait were observed in 18% of the heads. Violations of the feeding and keeping conditions led to the appearance of diseases such as osteodystorophia, ketosis, dystrophic processes in the liver, impaired functions in the reproductive system, musculoskeletal system and premature departure of up to 31% of highly productive cows from the herd.

нет ели, коровы, рацион, биохимия крови, удой, заболеваемость, heifers, cows, diet, blood of biochemistry, milk yield, morbidity

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