【摘要】 为研究二元后备母猪配种日龄、情期、体重和P2背膘厚对初产母猪窝均产仔数、窝均产活仔数的影响,对284头加系二元后备母猪的配种指标和产仔数进行统计分析,结果表明:随着P2背膘厚的增加,窝均产仔数和窝均产活仔数呈线性增加;初配体重在145～155 kg的后备母猪繁殖性能最佳;2个情期以上参与配种的后备母猪产子性能高于初情期配种的母猪,配种日龄在246～270 d范围内繁殖性能最佳。更多还原

【Abstract】 In order to study the body condition at mating on the reproductive performance of primiparous sows, the age, number of estrus cycle, bodyweight, P2 backfat at mating and litter size of 284 crossbred sows were recorded and analyzed. The results showed that the litter size and number born alive increased with P2 backfat thickness. The gilts at first breeding with body weight of 145～155 kg had the best reproductive performance. The little size of gilts bred at 2 nd or 3 rd estrus was higher than that of the first estrus, and the gilts bred at the age of between 246 and 270 days performed best in reproduction.更多还原