The three types of hybrid fattening pigs with 25%,50% and 75% American Duroc blood had average daily gain of 755 g,769 g and 815 g;

• 导入美系杜洛克猪血液 2 5%25 ,50%25 ,75%25的肥育猪性能 :日增重分别为 755,769和 815g ;