关键词: 三元后备母猪；选种；发情；饲养管理

Abstract: The scientific feeding and management of reserve sows has laid a foundation for the long ? term development of pig farms，which is of great significance to realize self?breeding and self?cultivation of pig farms，and improve the comprehensive breeding efficiency. Therefore，it is the premise to improve the production potential of pig farms and one of the basic guarantees for the sustainable and stable production of the pig farms. This paper reviewed the breeding，estrus，disease，and mating management of ternary backup sows，and also summarizes the key points of management of ternary backup sows. It is hoped that it can help pig farms to raise backup sows，and improve the conception rate and childbirth rate，and then improve efficiency.

Key words: Ternary reserve sow；Breeding；Oestrus；Feeding management