Changes in the composition of milk of sows in the first survey in relationship with the biological value of diets

Abstract

Introduction. Determination of the aftereffect of the feed additive "Krezacin" in the diets of repair pigs on the quality indicators of the milk of sows of the first farrowing.
Materials and methods. After completing the scientific and economic experience conducted in the conditions of pig farming by the POA "Center for Practical Training" of the Republic of Mordovia, on crossbred pigs (large white X landras), using the feed additive "Krezacin" as part of their diet, after transferring the pigs to the reproduction workshop, and farrowing them, in order to identify the aftereffect of the studied additive Observations were made on the composition of the milk of sows of the first farrowing.
Results and conclusions. The conducted studies showed that repair pigs from the first experimental group, who received 5.0 mg/kg of live weight in addition to the basic diet of cresacin, had better milk after the first farrowing compared with milk from sows from other experimental groups. Thus, the dry matter content of sow milk from the first experimental group exceeded the milk of control analogues by 1.08% (p<0.05), analogues from the second experimental group by 0.31% and from the third experimental group by 0.92% (p>0.05). An advantage in fat and protein content was also found in the milk of sows from the first experimental group. Thus, in terms of fat content they were superior to control sows – by 0.65% (p<0.05), analogues from the second group – by 0.31% (p>0.05) and from the third – by 0.41% (p>0.05), and in terms of protein concentration, the milk of sows of the first group exceeded the control and the third experimental group – by 0.39% (p<0.05), from the second group – by 0.28% (p<0.05). The best result for the concentration of heavy metals was also found in the milk of sows from the first experimental group.