长大、PIC、混血母猪繁殖性状研究

对红河州某猪场长大母猪311窝、PIC母猪138窝及当地农村饲养混血母猪753窝的繁殖性状进行测定,探讨品种、胎次和分娩季节对母猪繁殖性状的影响。结果表明,品种因素对母猪产仔性能有显著影响,长大母猪和混血母猪的总产仔数、产活仔数、初生窝重、28 d校正断奶窝重均极显著高于PIC母猪（P〈0.01）,长大母猪和混血母猪间除初生窝重、初生个体重和28 d校正断奶成活率有极显著差异（P〈0.01）外,其它指标差异均不显著（P〉0.05）。胎次因素对母猪产仔性能产生显著影响,经产母猪显著高于初产母猪（P〈0.05）,长大、PIC母猪2~8胎、混血母猪3胎以上产仔性能较好,其中长大、PIC母猪以第4胎最佳。分娩季节对PIC、混血母猪的繁殖性状无显著影响（P〉0.05）,而对长大母猪的产活仔数有显著影响（P〈0.05）。

Study on Reproductive Traits of Landrace-Yorkshire,PIC, Mixed Blood Sows

The reproductive traits of 311 nests Landrace-Yorkshire （LY） sows, 138 nests PIC sows, 753 nests local rural raising mixed blood sows in pig farm of Honghe were measured, to explore the effect of varieties, tire and delivery season on reproductive traits. Results showed that the varieties factors had significant impact on the litter performance of sows, the total litter size of LY sows and mixed blood sows, birth litter weight, 28 days correction weaning nests were extremely significant greater than those of PIC sows（P〈0.01）;the primary weight had extremely significant difference between LY sows and mixed blood sows（P〈0.01）, while other indicators has no significant difference （P〉0.05）. Tire factors had a significant impact on the litter performance of sows, multiparous sows were significantly greater than the first farrowing sows（P〈0.05） , the litter performance of 2~8 fetus LY and PIC sows, and above 3 fetus mixed blood sows had good performance, among those, the 4 fetus LY and PIC sows were the best. Delivery season had no significant effect on the reproductive traits of PIC sows and mixed blood sows （P〉0.05）, while had significant effect on the number of born alive of LY sows （P〈0.05）.