饲喂杭白菊茎叶对生长羔羊生长性能和血清抗氧化指标的影响

Effects of Feeding Chrysanthemum Stem-leaf on Growth Performance and Serum Antioxidant Indices of Growing Lambs

本试验旨在研究杭白菊茎叶对生长羔羊生长性能和血清抗氧化指标的影响。试验选取平均体重为(16.0±2.6)kg的断奶湖羊羔羊36只,随机分成4组,每组3个重复,每个重复3只羔羊。试验采用精粗比为30:70的颗粒化全混合日粮,4组饲粮粗饲料中稻草和杭白菊茎叶的比例分别为70:0(Ⅰ组)、45:25(Ⅱ组)、25:45(Ⅲ组)和0:70(Ⅳ组)。饲养试验持续72d,其中前12天为预试期。结果表明,随着杭白菊茎叶饲喂比例的增加,羔羊的平均日增重增加,且Ⅰ和Ⅳ组间差异达显著水平(P<0.05)。随着杭白菊茎叶饲喂比例的增加,羔羊血清中CAT活性和T-AOC增加,Ⅲ和Ⅳ组与Ⅰ组相比,差异显著(P<0.05);Ⅲ组血清中GSH-Px活性显著高于其余各组(P<0.05);羔羊血清中MDA含量随杭白菊茎叶饲喂比例的增加而减少,Ⅰ和Ⅳ组间差异显著(P<0.05)。由此得出,杭白菊茎叶用作粗饲料饲喂生长羔羊可以提高机体抗氧化能力,促进生长。

This study was conducted to determine the effects of feeding chrysanthemum stem-leaf on growth performance and serum antioxidant indices of growing lambs.Thirty-six weanling Hu lambs with an average body weight of （16.0±2.6） kg were randomly assigned to four groups,with three replicates per group and three lambs per replicate.The ratio of roughage to concentrate in all pelleted total mixed rations was 70：30.Proportion of rice straw to chrysanthemum stem-leaf in roughage was 70：0,45：25,25：45,and 0：70 in diets Ⅰ to Ⅳ,respectively.The trial lasted for 72 days with the first 12 days for adaptation.The results showed as follows：with the feeding level of chrysanthemum stem-leaf increasing,average daily gain was increased,with a significant difference between groups Ⅰ and Ⅳ （P〈0.05）.With the feeding level of chrysanthemum stem-leaf increasing,serum catalase activity and total antioxidant capacity were increased,and the above two indices in groups Ⅲ and Ⅳ were significantly higher than those in group Ⅰ （P〈0.05）.Serum glutathione peroxidase content in group Ⅲ was significantly higher than that in other groups （P〈0.05）.With the feeding level of chrysanthemum stem-leaf increasing,serum malondialdehyde content was decreased,with a significant difference between groups Ⅰ and Ⅳ （P〈0.05）.In conclusion,chrysanthemum stem-leaf as a roughage into diets can increase antioxidant ability and promote growth of growing lambs.