Kết quả nuôi vỗ béo, chất lượng thân thịt của các tổ hợp lợn lai giữa nái F1(Landrace x Yorkshire) với đực giống Landrace, Duroc và (Pietrain x Duroc)

This study is carried out at 9 pig farms belong to 3 provinces (Hai Duong, Hung Yen and Bac Ninh) from June 2006 to December 2007 in order to evaluate the performance of some cross formula between crossed sow F1 (Landrace x Large white) and exotic boars (Landrace and (Piétrain x Duroc)). The result shows that the litter size, alive pig/litter and litter size of weaned piglets from three cross formula is rather high comparing with published researches. The is not significant difference between three cross formula on litter size of weaned piglets, 10.2 at the cross formula D x F1(LxY), 10.56 at two others (L x F1(LxY), (PxD) x F1(LxY)). Weaned piglet weight is the most important for the cross formula D x F1(LxY) with 6.22 kg, then the L x F1(LxY) with 5.86 kg, and the (PxD) x F1(LxY) with 5.73 kg (P<0.05). At 60 age day, the weight is the highest in formula D x F1(LxY), followed by L x F1(LxY), and (PxD) x F1(LxY) (21.17; 20.82 and 20.56 kg/pig, respectively). Feed conservation rate (FCR) of weaned piglet is 6.12 kg for the formula L x F1(LxY), 6.28 kg for the formula (PxD) x F1(LxY) and 6.34 kg for the formula D x F1(LxY).