Changes in the reproductive qualities of TN70 married sows depending on age

Research conducted at LLC "Kamsky Bacon" of the Tukaevsky district of the Republic of Tatarstan to study the reproductive qualities of crossbred sows TN70 of different age groups showed hidden possibilities for increasing the safety of young animals before weaning. With age, crossbreeds experience an increase in the birth rate of live piglets from 14.58 to 16.58 heads. An increase in multiple births leads to a decrease in the body resistance of the resulting piglets, as evidenced by: a decrease in safety at weaning from 13.82 to 13.17 heads; an increase in the number of stillbirths from 1.55 to 3.97 heads; an increase in the number of piglets planted from 3.37 heads to 3.88 heads. An increase in the birth rate of live piglets contributes to an increase in the number of piglets placed in nursing mothers from 2.57 to 3.88 heads, and an increase in the duration of the gestation period from 115.36 to 115.54 days. The thickness of backfat before farrowing in pregnant sows increased with age from 16.47 mm to 16.63 mm, and measurements at the end of weaning from 13.23 to 14.01 mm. Which indicates the normal condition of the sows according to the point assessment before farrowing - 3 points and at weaning - a slight lack of body weight - 2.5 points. The loss of spinal fat thickness did not exceed 3 mm in all age periods and was within the lower normal limits.