经产
sowandgiltmanagementtechniques经产母猪和后备母猪管
more gilts没有增加足够的后备母猪 – Less selection选择少 – Breed of marginal边缘配种 • Poor P1 and sow performance头胎和经产母猪性能差 (Williams, Patterson, and Foxcroft. Banff Pork Seminar, 2020) United Feeds Research