THE USE OF SULFUR-CONTAINING BIOREGULATORS IN FEEDING AMERICAN MINK

Abstract

Two synthetic bioregulators were used to conduct the study: DNS (disodium salt of succinate) and C (cysteine derivative). Biochemical blood tests were performed on the semi-automatic biochemical analyzer BTS-330 “BioSystems” using generally accepted and unified methods using standard sets of reagents from “BioSystems”. To conduct the study, a control and two experimental groups of males and female minks were formed (25 heads of females and 5 heads of males in each group).

The purpose of the work was to study the effect of sulfur-containing bioregulators on the level of realization of the reproductive ability of male and female minks under unstable feeding in the conditions of modern fur farms, the dynamics of growth and development and preservation of young animals, and the quality characteristics of the fur of young American minks when using mineral sorbents as a feed additive. An increase in the fertility of females by 4.7% and the registration yield of

young animals by 20%, as well as an improvement in the fertilization capacity of males by 7%, was established. The physiological state and protective properties of

the body improve. A probable increase in the level of total protein in the blood serum by 14.5% in group D1 and creatinine by 24 and 31%, respectively, in the groups was established.

At 60 days of age, puppies of both experimental groups with a significant difference prevailed in weight over young animals of the control group, while the

most effective was the administration of the disodium salt of succinate, at a dose of 0.2 g/head. Young minks grew more intensively and significantly outweighed the

peers of the control group by 23.3 g (P>0.99). Maximum live weight gain Masses in young animals of experimental groups (+11.8...+15.4%) were recorded up to 90 days of age; in the future, the predominance of this indicator was observed in animals of the control group.

According to the results of the study of the morphological composition of the blood of minks of 180 days of age, there was no significant difference in the number

of erythrocytes, hemoglobin, and leukocytes. The above indicators were within the physiological norm; however, in animals that additionally added a sulfur-containing

drug to the diet, the number of erythrocytes in the blood was higher by 6.1%, hemoglobin by 8.8%, and leukocytes by 3.4%.

Morphometric characteristics of the juvenile hairline of young minks of the studied groups at the age of 45 days did not have a probable difference in hair length

(P<0.95). At the age of 60 days, the predominance of hair length of different categories in animals of experimental groups was established (P>0.95). The

average value of the integumentary hair length was 14-15 mm, axial 10-11, and downy 6-8 mm. When comparing the average values of hair thickness of different

categories at this age, a probable difference was noted (P>0.95). A similar trend persisted until the beginning of molting. Molting of animals of the studied groups

began on August 20 and ended on October 24; the duration of this period varied within the groups from 56 to 67 days.