Abstract: To investigate the effects of Artemisia argyi powder on production performance，nutrient apparent digestibility，antioxidant function and the number of fecal microorganisms of fattening pigs，48“Changbai×Dabai”binary fattening pigs with body weight of 50.0 kg were randomly divided into 4 groups：the control group was fed with basal diet only；the experimental groups were added with 2%，4% and 6% Artemisia argyi powder，which were recorded as AAP‑1 group，AAP‑2 group and AAP‑3 group，respectively.The feeding experiment was conducted from May to July 2024，and the indexes were measured after the end. The results showed that in terms of groduction performance，the final weight of the AAP‑2 group and the average daily gain of the three experimental groups were significantly improved.The final weight and average daily gain of the AAP‑2 group were 10.26% and 19.10% higher than those of the control group，respectively.At the same time，the feed‑weight ratio of the AAP‑2 group and the diarrhea rate of the three experimental groups were significantly lower than those in the control group，with feed‑weight ratio and diarrhea rate of the AAP‑2 group decreased by 12.03% and 23.83%，respectively.In terms of nutrient apparent digestibility，compared with the control group，the apparent digestibility of calcium，crude protein and crude fat in the three experimental groups was significantly increased.Among them，the AAP‑2 group showed the greatest improvement，with the digestibility of calcium，crude protein，and crude fat increased by 16.82%，10.14%，and 13.48%，respectively，compared to the control group.In terms of antioxidant function，the activities of catalase，glutathione peroxidase，superoxide dismutase，and total antioxidant capacity in the AAP‑2 group were 36.77%，21.13%，20.36%，44.80% higher than those in the control group，respectively.The content of malondialdehyde decreased by 25.70% compared with the control group.In terms of the number of fecal microorganisms，the number of Lactobacillus and Bifidobacterium in the AAP‑2 group increased by 19.61% and 11.85%，respectively，compared with the control group，while the number of Escherichia coli and Salmonella decreased by 11.18% and 22.09%，respectively.In summary，the addition of 4% Artemisia argyi powder can improve production performance，increase nutrient apparent digestibility，enhance antioxidant function，and increase the number of beneficial bacteriaand reduce the number of harmful bacteria in feces of fattening pigs.

Key words: Fattening pig, Artemisia argyi powder, Growth performance, Nutrient apparent digestibility, Antioxidant function, Fecal microorganisms

摘要： 为了探讨艾草粉对育肥猪生产性能、养分表观消化率、抗氧化功能及粪便微生物数量的影响，以48头体质量约50.0 kg的“长白×大白”二元杂交育肥猪为研究对象，将其随机分为4组：对照组仅饲喂基础日粮；试验组分别添加2%、4%、6%艾草粉，分别记为AAP-1组、AAP-2组、AAP-3组。饲养试验于2024年5—7月进行，结束后测定各项指标。结果表明，在生长性能方面，AAP-2组末质量、3个试验组平均日增质量均显著提高，AAP-2组末质量和平均日增质量分别较对照组提高10.26%和19.10%；同时，AAP-2组的料重比、3个试验组的腹泻率均显著低于对照组，AAP-2组的料重比和腹泻率分别降低12.03%和23.83%。在养分表观消化率方面，与对照组相比，3个试验组钙、粗蛋白质和粗脂肪表观消化率均显著提高，其中，AAP-2 组提升幅度最大，其钙、粗蛋白质和粗脂肪消化率分别较对照组提高16.82%、10.14%和13.48%。在抗氧化功能方面，AAP-2组过氧化氢酶活性、谷胱甘肽过氧化物酶活性、超氧化物歧化酶活性、总抗氧化能力分别较对照组提高36.77%、21.13%、20.36%、44.80%；丙二醛含量较对照组则降低了25.70%。在粪便微生物数量方面，AAP-2组乳酸杆菌和双歧杆菌数量较对照组分别增加19.61%和11.85%，大肠杆菌和沙门氏菌数量则分别减少11.18%和22.09%。综上，添加4%艾草粉可改善育肥猪生长性能、提高养分表观消化率、增强抗氧化功能，同时增加粪便中有益菌数量并减少有害菌数量。

关键词: 育肥猪, 艾草粉, 生长性能, 养分表观消化率, 抗氧化功能, 粪便微生物