Xing Xiaokun, Zhang Chunyong, Ji Peng, Yang Jia, Li Qihua, Pan Hongbin, An Qingcong
Yunnan Provincial Key Laboratory of Animal Nutrition and Feed Science, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
Animals (Basel). 2023 Feb 1;13(3):517. doi: 10.3390/ani13030517.
To improve the reproductive performance of sows and the iron nutrition of newborn piglets, we studied the effects of dietary iron on reproductive performance in pregnant sows as well as antioxidant capacity and the visceral iron content of sows and newborn piglets. Forty pregnant sows were divided into four groups, the iron deficiency group (Id group) was fed a basic diet while sows in the treatment groups were fed diets supplemented with 200 mg/kg lactoferrin (LF group), 0.8% heme-iron (Heme-Fe group), or 500 mg/kg iron-glycine complex (Fe-Gly group). The results indicated that (1) different sources of iron had no significant effect on litter size, live litter size, and litter weight of sows; (2) the three additives improved iron nutrition in newborn piglets, with LF and Heme-Fe having better improvement effects; and (3) the addition of different iron sources improved the level of serum antioxidant biochemical indexes of sows and newborn piglets, and it can have an effect on gene level, among which lactoferrin has the best effect. Thus, adding LF, Heme-iron, or Fe-Gly to the diet of sows during the second and third trimester of gestation can improve the antioxidant capacity of the sows. The supplementation of LF in pregnant sow diets can also improve the antioxidant capacity and the iron nutrition of newborn piglets, with better additive effects than in Heme-Fe and Fe-Gly.
为提高母猪繁殖性能及新生仔猪铁营养水平，我们研究了日粮铁对妊娠母猪繁殖性能以及母猪和新生仔猪抗氧化能力与内脏铁含量的影响。40头妊娠母猪分为四组，缺铁组（Id组）饲喂基础日粮，治疗组母猪分别饲喂添加200 mg/kg乳铁蛋白的日粮（LF组）、0.8%血红素铁的日粮（血红素铁组）或500 mg/kg甘氨酸铁络合物的日粮（Fe-Gly组）。结果表明：（1）不同铁源对母猪产仔数、活产仔数和窝重无显著影响；（2）三种添加剂均改善了新生仔猪的铁营养状况，其中乳铁蛋白和血红素铁的改善效果更好；（3）添加不同铁源提高了母猪和新生仔猪血清抗氧化生化指标水平，且在基因水平上有影响，其中乳铁蛋白效果最佳。因此，在妊娠中后期给母猪日粮中添加乳铁蛋白、血红素铁或甘氨酸铁可提高母猪的抗氧化能力。在妊娠母猪日粮中添加乳铁蛋白还可提高新生仔猪的抗氧化能力和铁营养水平，其添加效果优于血红素铁和甘氨酸铁。
