【摘要】 将大约克母猪繁殖性能按不同胎次进行分组,在每组中随机抽取30头母猪生产记录,统计分析母猪不同胎次的繁殖性能,结果表明:母猪的总产仔数、活产仔数、初生窝重随着胎次的增加而逐渐提高,到第4胎达到高峰,以后随着胎次的增加繁殖性能缓慢下降,呈一定的正态分布。更多还原

【Abstract】 According to reproduction performance and parity, Large Yolk sows were divided into different groups. The production records of 30 sows were chosen from each group randomly. The reproduction performance of different parity was analyzed by statistics.The results showed that total number of piglet, number of living piglet and farrow weight of newborn were improved with parity increasing. The peak was at the fourth parity, and then the reproduction performance decreased slowly with parity increasing. All appeared to be normal distribution.更多还原