回答空怀期和妊娠前期:玉米56.7%,麸皮21%,豆粕14%,棉籽粕4%,食盐2%,石粉0.5%,碳酸氢钙0.8%,微量元素+维生素预混料1%。妊娠后期:玉米54%,麸皮18%,豆粕23.3%,食盐1.5%,石粉1.2%,碳酸氢钙1%,微量...