猪源芽孢杆菌LH-3对断奶仔猪生长性能、血清免疫和抗氧化指标的影响

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Abstract：Thisstudyaims toevaluate theefectofBacilusvelezensis LH-3onthegrowth performance，immunefunction，nd antioxidantcapacity of weaned piglets.The trial was caried out with three groups： a control group （basal diet），a 0.2% LH-3 group （basal diet +0.2% LH-3 fermentation broth）， and a 0.4% LH-3 group （basal diet +0.4% LH-3 fermentation broth）. The trial lasted for 42d The results showed thatcompared withthecontrol group，LH-3supplementationsignificantlyincreasedthe averagedaily gainandreducedtefeed-tgainatinddarearate.Regardingimmuneparameters，L-3spplemetationsgnifcantlyeleated the serum levels of immunoglobin A （IgA）， immunoglobin G （IgG），and interleukin （IL）-10，with the increasesof 29.7% 23.4% ，and 17.9% in the 0.2% LH-3 group and 53.1% 39.7% ，and 14.9% in the 0.4% LH-3 group， respectively. In addition， compared with the control group，the LH-3 supplementation significantly lowered IL-6 and tumor necrosis factor （TNF）. ∇⋅a contentof serum， significantly increasedactivitiesof totalsuperoxidedismutaseandglutathione peroxidase，andsignifcantlydcreasedcontentofmalondialdehyde. Thestudy demonstrated that dietary supplementation of B velezensisLH-3 improved thegrowth performance，immune function，and antioxidant capacity of weaned piglets， with the 0.4% supplementation dosage yielding more significant effect.

Keywords：Bacillusvelezensis;weaned piglets;growthpeformance;immunefunctionindicator;antioxidantcapacityindicator

生猪养殖过程中常面临多种疫病风险，传统上抗生素被广泛用于疫病防控。（剩余7167字）