Perestrelo R, Perestrelo H, Madec F, Tillon J P
Instituto de Protecćão à Produção Agro-Alimentar, Largo da Academia Nacional das Belas Artes, Lisbon, Portugal.
Vet Res. 1994;25(2-3):266-70.
Data collection related to production performances and health parameters was developed in 31 intensive pig farms in Portugal (from 100-800 sows each) in 1,580 of 10,000 sows over 7 yr (1985-1992). Using prospective surveys and subsequent preventive veterinary medicine programs in pig farms, we demonstrated the value of risk-factor analysis in the improvement of production performances: an increase in litter size from 9.15 piglets born/litter (sd 2.93) to 13.4 (sd 2.13); an increase in number of weaned piglets per sow per year: 15.73 (sd 1.93) to 20.46 (sd 1.92); and a decrease in returns to oestrus (25.3 to 2.3%).
在1985年至1992年的7年时间里，对葡萄牙的31个集约化猪场（每个猪场有100 - 800头母猪）的10000头母猪中的1580头进行了与生产性能和健康参数相关的数据收集。通过在猪场进行前瞻性调查以及后续的预防性兽医医学项目，我们证明了风险因素分析在提高生产性能方面的价值：窝产仔数从每窝9.15头仔猪（标准差2.93）增加到13.4头（标准差2.13）；每头母猪每年断奶仔猪数从15.73头（标准差1.93）增加到20.46头（标准差1.92）；发情返情率从25.3%降至2.3%。
