大约克母猪繁殖性状调查分析

Investigation and Analysis of Reproductive Traits for Yorkshire Sows

为获取大约克母猪相关生产参数,供猪场管理者决策参考,提高养猪经济效益,通过驻场调查和数据统计等方法,对贵阳市某规模化教学科研猪场2014—2017年主营的大约克母猪繁殖性状进行调查分析。结果:该场大约克母猪平均初情期日龄为243.2 d;平均发情周期为22.03 d;配种时间在发情后42 h最佳,配种次数以2次为宜;平均妊娠天数为113.94 d,产程180~270 min,产仔间隔19~25 min;平均窝产仔数、窝产活仔数分别为10.34、9.21头;第4胎产仔性能最优。

In order to obtain the relevant productive parameters for the managers to make decision and improve the economic efficiency of pig raising,a large-scale teaching and research pig farm in Guiyang city was investigated on reproductive traits of Yorkshire sows in 2014-2017 by means of field investigation and data statistics in this paper.The results showed that average age of the first oestrous period is 243.2 d and average estrus cycle is 22.03 d;best mating time is 42 h after oestrus and best mating frequency is 2 times;average gestation days is 113.94 days;time of lasting birth stage is 180~270 minutes,and time of interval of farrowing a piglet is 19~25 minutes;average litter size and live litter size are 10.34 and 9.21,respectively;the fourth-litter yorkshire sows unfold the optimal reproductive performance.