大豆甙元对生长期锦江黄牛生产性能、抗氧化能力及免疫性能的影响

本试验旨在研究大豆甙元对生长期锦江黄牛生产性能、抗氧化能力及免疫性能的影响。选取20头健康状况良好、体重为(140±5)kg的生长期锦江黄牛,随机分为4组,每组5头牛。对照组饲喂基础饲粮(精粗比为4∶6),试验组分别饲喂在基础饲粮中添加了100、200和400 mg/kg大豆甙元的试验饲粮。限饲各组的干物质采食量均为3.98 kg/d。预试期为10 d,正试期为60 d。结果表明:1)各试验组平均日增重显著高于对照组(P0.05),400 mg/kg组较对照组高126.6 g/d。2)各试验组粗蛋白质表观消化率均显著高于对照组(P0.05)。3)与对照组相比,各试验组血清总超氧化物歧化酶(T-SOD)活性均显著升高(P0.05);各试验组血清谷胱甘肽过氧化物酶(GSH-Px)活性相比于对照组均有升高的趋势(0.05≤P≤0.10);各试验组血清丙二醛(MDA)含量均低于对照组,但差异不显著(P0.05)。4)各试验组血清免疫球蛋白(Ig)M含量均显著高于对照组(P0.05),同时400 mg/kg组显著高于100 mg/kg组(P0.05);各试验组的血清IgG含量相比于对照组均有一定程度的升高,但差异均不显著(P0.05)。由上述结果可见,饲粮中添加适量的大豆甙元可以提高生长期锦江黄牛养分消化率,促进犊牛的生长,同时提高免疫及抗氧化性能。

Effects of Daidzein on Performance,Antioxidant Capacity and Immune Function of Growing Jinjiang Cattle

This experiment aimed at studying the effects of daidzein on performance, antioxidant capacity and immune function of growing Jinjiang cattle. Twenty healthy 6-month old Jinjiang cattle weighted (140±5) kg were randomly divided into four groups with 5 cattle per group. Control group was fed a basal diet ( concentrate to forage ratio was 4∶6) , and 3 experimental groups were fed the basal diet supplemented with 100, 200 and 400 mg/kg daidzein, respectively. Dry matter intake of all groups was 3.98 kg/d due to limited feeding. Pre-test period was 10 days, and formal test period was 60 days. The results showed as follows:1) average daily gain in experimental groups was significantly higher than that in control group (P<0.05), and 400 mg/kg group was 126. 6 g/d higher than control group. 2 ) Apparent digestibility of crude protein in experimental group was significantly higher than that in control group ( P<0.05) . 3) Compared with control group, serum total superoxide dismutase ( T-SOD ) activity in experimental groups was significantly higher ( P<0. 05 );meanwhile, serum glutathione peroxidase ( GSH-Px ) activity in experimental group tended to be increased (0.05≤P≤0.10); serum malondialdehyde (MDA) content in experimental group was decreased, but the difference was not significant (P>0.05). 4) Serum immunoglobulin (Ig)M content in experimental groups was significantly higher than that in control group (P<0.05), and 400 mg/kg group was significantly higher than 100 mg/kg group (P<0.05); serum IgG content in experimental groups had the trend of increase com-pared with that in control group ( P>0.05) . The results suggest that dietary supplementation of appropriate level of daidzein can improve nutrient digestibility of growing Jinjiang cattle, promote growth, and improve antioxi-dant capacity and immune function.