Lying positions, lying posture lying orientation of Landrace sows and Yorkshire sows were observed before and after parturition in farrowing pens.

• 摘要对分娩圈中长白、大白母猪产前、产后的卧位、卧姿和卧向进行了观察，并就母猪对分娩圈空间的利用进行了研究。