笔者近期对乐都县12家规模养猪场进行了调查,结果显示存栏2000头以上的较大、大型规模养猪场母猪繁殖率下降比例为18.9%。平均窝产活仔数8.2头,较2011年减少7.21%,平均每头能繁母猪年可提供商品猪14.6头左右。存栏1000头以下中小规模养猪场母猪繁殖率下降比例为31.6%,平均窝产活仔数7.6头,较2011年减少10.12%,平均每头能繁母猪年可提供商品猪12~13头左右。由于母猪繁殖率下降 The author recently conducted a survey of 12 large-scale pig farms in Ledu County. The results showed that the breeding rate of sows in larger and large-scale pig farms with more than 2,000 flocks dropped by 18.9%. The average litter size was 8.2, representing a decrease of 7.21% as compared with that in 2011. On average, there were 14.6 pigs available each year for each sow. The breeding rate of sows in small and medium size pig farms below 1000 was reduced by 31.6% and average litter size was 7.6, representing a decrease of 10.12% as compared with 2011. The average sow per pig was 12-13 Head around. As the sow breeding rate decreased