3 males and 3 females were slaughtered respectively when pigs reached 20kg, 35kg, 50kg, 80kg and 100kg BW for determining protein retention rate.

• 平均体重达到20kg、35kg、50kg、80kg和100kg时称重，计算试验猪的生产性能； 每次称重时，每圈选1头体重接近圈平均体重的猪屠宰，测定试验猪的无脂瘦肉生长率。