后备母猪 meaning in English

hilt
replacement gilt

Nutrition of lean sows
饲养管理-后备母猪
This makes it necessary to allow gilts to reach a higher age and weight before expecting them to breed successfully
因此，为了达到良好的繁殖性能，就应该延缓后备母猪的初配日龄。
What is needed is an integrated feeding strategy , starting with the developmental period of the gilt , and continuing throughout each successive gestation and lactation period , which is designed to maintain productivity and prolong the reproductive life of the sow
关联的饲喂策略，由后备母猪开始，然后包括持续的妊娠和泌乳，从延长母猪的种用期和维持好的繁殖性能入手。
What is becoming evident is that both fat and lean are essential tissues for reproduction and the objective of the feeding program for replacement gilts should be to manipulate the body composition of the gilt to ensure that adequate reserves of these tissues are present at first mating
显而易见，脂肪和瘦肉都是保持良好繁殖性能必须的体组织，同时也是后备母猪饲喂目标：控制青年母猪的体组成，确保初配时有脂肪和瘦肉沉积。