The purpose of this study was to investigate the effects of diet type (normal or low Ca and P diets) and 25(OH)D₃ supplementation (with or with not 2000 IU/kg 25(OH)D₃) during late gestation on the serum biochemistry and reproductive performance of aged sows and newborn piglets. A total of 40 sows, which are at their 7th parity, were divided into four groups: control group (standard diet), low Ca group, 25(OH)D₃ group and low Ca plus 25(OH)D₃ group respectively (10 in each group). The blood of sows on day 100 and 114 of gestation and newborn piglets was collected for serum biochemical analyses. Results showed that the reproductive performance of sows was not influenced by diet type or 25(OH)D₃ supplementation (p > 0.05). And the addition of 25(OH)D₃ to diet low Ca group caused that the content of serum TG in sows on day 100 of gestation was not different from that of the control group (p > 0.05). The addition of 25(OH)D₃ significantly decreases the content of serum TG in sows on day 114 of gestation (p < 0.05). The addition of 25(OH)D₃ significantly increased the content of serum UREA and CREA in newborn piglets (p < 0.05). Overall, feeding 2000 IU/kg 25(OH)D₃ to aged sows at late gestation had no effects on reproductive performance, but partly contributed to keeping serum TG balance in sows and may indicate increased pressure on kidneys in newborn piglets.

中文翻译：

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妊娠后期补充25(OH)D3对老年母猪和新生仔猪血清生化和繁殖性能的影响

本研究的目的是调查饮食类型（正常或低钙和磷饮食）和 25(OH)D ₃补充（有或没有 2000 IU/kg 25(OH)D ₃）对妊娠晚期的影响老年母猪和新生仔猪的血清生化和繁殖性能。将40头7胎的母猪分为4组：对照组（标准日粮）、低钙组、25（OH）D ₃组和低钙加25（OH）D ₃组（每组10人）。收集妊娠第 100 天和第 114 天的母猪和新生仔猪的血液用于血清生化分析。结果表明，母猪的繁殖性能不受日粮类型或 25(OH)D _{3 的影响}补充（p  > 0.05）。低钙组添加25(OH)D ₃使母猪妊娠第100天血清TG含量与对照组无差异( p  > 0.05)。25(OH)D _{3 的添加}显着降低了母猪在妊娠第114 天的血清 TG 含量（p  < 0.05）。添加25(OH)D ₃显着增加新生仔猪血清尿素和CREA的含量（p  < 0.05）。总体而言，喂养 2000 IU/kg 25(OH)D ₃ 对妊娠后期的老年母猪没有影响繁殖性能，但部分有助于保持母猪血清 TG 平衡，并可能表明新生仔猪肾脏压力增加。