大豆异黄酮对生长猪生长性能、血清生化、免疫和抗氧化能力的影响

Effects of Dietary Supplementation of Soybean Isoflavones on Growth Performance,Serum Biochemistry,Immunity and Antioxidant Capacity in Growing Pigs

试验旨在研究饲粮中添加不同水平大豆异黄酮对生长猪生长性能、血清生化、免疫和抗氧化能力的影响。选取60头体重(25.83±1.24)kg的健康杜×长×大阉公猪,随机分成4组,每组5个重复,每个重复3头猪。对照组饲喂基础饲粮,试验组在基础饲粮的基础上分别添加10、20、40 mg/kg大豆异黄酮。预试期5 d,正试期28 d。结果表明:与对照组相比,饲粮中添加大豆异黄酮提高了试验猪后期(15~28 d)的平均日增重(ADG)(P=0.05),且与大豆异黄酮的添加剂量呈线性相关(P<0.05);与对照组相比,大豆异黄酮组试验猪第29天血清样中球蛋白(GLB)含量升高(P<0.05),白球比(A/G)下降(P<0.05),且A/G随着大豆异黄酮添加剂量的增加呈线性降低(P<0.05),尿素氮(UN)水平降低(P<0.05);与对照组相比,添加大豆异黄酮均提高了试验猪第15天血清补体C3含量及第29天血清IgA浓度(P<0.05);与对照组相比,添加大豆异黄酮降低了试验猪血浆丙二醛(MDA)浓度(P≤0.05),提高了过氧化氢酶(CAT)活性(P<0.05),其中第15天血浆MDA浓度呈线性下降模式(P=0.05),第29天血浆CAT活性呈线性上升趋势(P=0.056)。综上,饲粮中添加大豆异黄酮可提高生长猪后期ADG,且与大豆异黄酮的添加剂量呈线性相关;添加大豆异黄酮对生长猪血清免疫指标、血浆抗氧化指标等均有显著改善作用。

The study was conducted to investigate the effects of dietary supplementation of soybean isoflavones(SIF)at different levels on growth performance,serum biochemistry,immunity and antioxidant capacity in growing pigs.A total of 60 barrows(Duroc×Landrace×Yorkshire,25.83±1.24 kg BW)were randomly allocated into 4 groups,with 5 pens per group and 3 pigs per pen.The pigs in the control group were fed with basal diet,and the treatment group were fed a basal diet supplemented with 10,20 or 40 mg/kg SIF respectively.The feeding trial lasted for 28 d after 5 d adaption.Dietary supplementation of SIF increased ADG of pigs during d 15 to 28(P=0.05),and linear increase effect was found(P<0.05).The dietary supplementation of SIF increased GLB(P<0.05),decreased UN(P<0.05),and linearly decreased A/G ratio of serum collected on d 29.Dietary supplementation of SIF increased serum C3(P<0.05)collected on d 15 and serum IgA(P<0.05)collected on d 29,respectively.The level of MDA in plasma was decreased with SIF supplementation(P≤0.05),and linearly decrease tendency was found in plasma collected on d 15(P=0.05).The activity of CAT in plasma was increased with the supplementation of SIF(P<0.05),and linearly increment tendency was found in plasma collected on d 29(P=0.056).In summary,dietary supplementation of SIF can increase ADG of growing pigs with linear effect at later period,and it is beneficial to improve serum immune indexes and plasma antioxidant parameters of pigs.