不同季节定时输精处理对后备母猪繁殖性能的影响OA

To investigate the effects of applying a fixed-time artificial insemination(FTAI)program on the reproductive performance of replacement gilts during high-temperature seasons,a total of 189 replacement gilts were divided into a high-temperature season group(n=86)and a non-high-temperature season group(n=103),in which each gilt underwent the FTAI program and treated with estrus detection,artificial insemination,and pregnancy diagnosis.The results showed that the standing reflex rate and standing duration in the non-high-temperature season group were significantly higher than those in the high-temperature season group(P＜0.05).Furthermore,the pregnancy rate in the non-high-temperature season group was higher(85.44%vs.80.23%),while the return-to-estrus rate(14.56%vs.17.44%)and abortion rate(5.83%vs.9.30%)were lower compared to the high-temperature season group,despite no significant difference(P＞0.05).The non-high-temperature season group demonstrated a significant increase in the number of live-born piglets per litter(12.45 vs.11.57),the number of healthy piglets per litter(11.07 vs.9.90),and litter birth weight(16.45 kg vs.14.51 kg)compared to the high-temperature season group(P＜0.05).In conclusion,high-temperature seasons could have a significant negative impact on the reproductive performance of replacement gilts,and the application of a FTAI program can help improve estrus outcomes in replacement gilts during these periods.