Abstract
In the conditions of modern man-caused pollution of the environment, environmental problems, as well as improving the quality of livestock products and their food safety, are important and relevant issues today. The study aimed to investigate the effect of the “Metisevit Plus” feed additive on bull blood's morphological and biochemical parameters under lead-cadmium loading conditions. The research was conducted based on the agricultural private enterprise “Ukraine” of Dubrovytsia district of Rivne region on 12 bulls of six months of age, Ukrainian black-and-white dairy breed, which was formed into two groups of 6 animals each. The bulls of the control group were on a standard diet. The bulls of the experimental group were fed the feed additive “Metisevit Plus” at a dose of 0.5 g/kg of feed. This farm has a high content of lead and cadmium in feed. According to the results of experimental studies, it was found that the feed additive “Metisevit Plus” is effective under lead-cadmium load in bulls. Administration of this feed additive to experimental animals helps restore their suppressed hematopoietic function; the number of erythrocytes and hemoglobin in their blood increased by 25.3 and 19.4 %, and the number of leukocytes decreased by 12.4 %, respectively. Metisevit Plus feed additive also enhanced the functional state and protein-synthesizing function of the liver of bulls under artificial conditions. When feeding the feed additive “Metisevit Plus”, a decrease in the activity of both alanine aminotransferase and aspartate aminotransferase in the serum of bulls of the experimental group was found. On day 40 of the experiment, it was found that the activity of alanine and aspartate aminotransferase in the serum of bulls of the experimental group fluctuated within physiological values. When a “Metisevit-Plus” feed additive is added to the diet, there is a tendency to increase the total protein level in bulls of the experimental group. In the study of the albumin level in the blood of bulls of the experimental group, its probable increase was found starting from the 10th day of the experiment. On the 30th and 40th day of the experiment, the albumin level in the blood of bulls in the experimental group was the highest, whereas compared to the control group, it increased by 15.4 and 17.0 %, respectively. Our studies confirm the feasibility of using the feed additive “Metisevit Plus” to prevent lead-cadmium toxicosis.
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