【摘要】 按母猪泌乳期(28天、35天和45天)设3组,选二花脸经产母猪20头,大约克经产母猪35头,断奶至发情、配种和下次繁殖的繁殖周期:二花脸母猪Ⅰ组分别为5.75天、8天和149.25天,Ⅱ组分别为5.1天、7.3天和156.5天,Ⅲ组分别为4.9天,7.0天和166天;大约克母猪Ⅰ组分别为5.2天、7.2天和149.2天,Ⅱ组分别为4.7天、6.7天和156.2天,Ⅲ组分别为4.2天、6.2和165.5天。各品种各组合的情期受胎率均为100％;同品种内各断奶日龄组间的产仔数、产活仔数和初生窝重均无明显差异(P>0.05)。更多还原

【Abstract】 20 ErHuaLian sows and 35 Large white sows were divided into 3 groups according to the different stages of Lactation Length respectively. The duration from weaning to heating, service and next parturition were 5. 75,8 and 149. 25 days respectively in EHL Group Ⅰ ;It was 5. 14,7. 29 and 156. 54 days in EHL Group Ⅱ;And 4. 88,7. 0 and 166 days in EHL Group Ⅲ .For large white sows, it was 5. 2,7. 2 and 149. 2 days respectively in Group Ⅰ;4. 73,6. 73 and 156. 23 days in Group Ⅱ;And 4. 2,6. 2 and 165. 45 days in Group Ⅲ. The conception rate of the all experimental sows was 100%. No significant difference in Liffer size, piglets born alive and litter weight at birth of the next reproductive cycle among three weaning treatment groups of the same breed (P>0. 05).更多还原