Nagornyj S. Reproductive and productive qualities of tested sows with dependence on length of lactation.

The subject of research is tested sows of the Large White Breed belonged to the Ukrainka experimental farm of the Institute of Animal Science of the UAAS Methods - experimental, statistical, economic Objective - to specify parameters of the management system elements for first-pig gilts. Theoretical and elements for first-pig gilts. Theoretical and practical tem, aimed at development of special management results - at cell, tissue, tested organ and body levels a most favourable lactation period was determined for sows. Novelty - gue to a more accurate calculation of the lactation period, a first input was made in Development of a new management texhnology, i. t. tested sows management system. Implemented - on a pig-producing farm. Application ared-pig-producing farms.