A single - factor experiment was designed to research the effect of nutrition level on body weight of multiparous sows during gestation through investigating the effect of gestation nutrition on the reproduction performance of multiparous sows in subsequent 3 parities and based on regression analysis of feed intake as well as lactation weight loss and reproduction performance during gestation 摘要采用单因子试验设计，通过对妊娠期不同营养水平连续3胎经产母猪生产的研究，建立妊娠期采食量与泌乳损失及繁殖性能等之间关系的回归方程，研究妊娠期不同营养水平对经产母猪体重变化的影响。
