摘要
本试验旨在探讨饲粮异黄酮添加水平对肥育猪抗氧化、生长及屠体性能的影响。选取72头健康(阉公猪和母猪各占1/2)的杜×长×大肥育猪(约60 kg)随机分为6组(每组6个重复,每个重复1头阉公猪与1头母猪),对照组饲喂玉米-豆粕型基础饲粮,试验组饲喂在基础饲粮中分别添加20、40、80、160和320 mg/kg异黄酮的试验饲粮。试验期为64 d。结果表明:1)饲粮添加160 mg/kg异黄酮显著提高了血浆中过氧化氢酶(CAT)活性(P<0.05);添加剂水平为80 mg/kg时显著提高肝脏中CAT活性(P<0.05),而添加水平为160 mg/kg时则显著抑制肝脏CAT活性(P<0.05)。2)饲粮添加40和80 mg/kg异黄酮显著降低了血浆中氧化型谷胱甘肽浓度(P<0.05),添加水平为40、80、160、320 mg/kg时显著提高了血浆中还原型谷胱甘肽浓度(P<0.05);添加水平为80和160 mg/kg时显著降低了血浆中丙二醛浓度(P<0.05)。3)肝脏中谷胱甘肽过氧化物酶(Gpx)活性随饲粮异黄酮添加水平增加呈显著的线性下降(P<0.05),添加水平为80、160和320 mg/kg时显著降低了肝脏中Gpx活性(P<0.05)。4)肝脏中氧化平衡系数在各添加水平间无显著差异(P>0.05),但随饲粮异黄酮添加水平的增加表现出显著的线性升高(P<0.05);添加水平为320 mg/kg时血浆中氧化平衡系数表现出高于对照组的趋势(P=0.08)。5)饲粮异黄酮添加水平对肥育猪的平均日增重、日均采食量、料重比无显著影响(P>0.05);对屠体重/率、眼肌面积、平均背膘厚、瘦肉重/率、脂肪重/率等屠体性能指标无显著影响(P>0.05);对背最长肌滴水损失、肉色、嫩度、pH无显著影响(P>0.05)。结果提示,饲粮中添加适宜水平的异黄酮可提高肥育猪抗氧化性能,而添加过高水平的异黄酮则可能降低其抗氧化性能(尤其在肝脏组织),玉米-豆粕型饲粮中添加异黄酮未影响到肥育猪的生长、屠体性能及肉质。
This experiment was conducted to investigate the effects of dietary supplemental level of isoflavones on antioxidant, growth and carcass performance of finishing pigs.Seventy-two finishing pigs （ half castrated boars and half sows, Duroc ×Landrace ×Large white） weighted about 60 kg were randomly allocated into 6 groups with 6 replicates in each group and 1 castrated boar and 1 sow per replicate.Pigs in control group were fed a corn-soybean meal basal diet, and those in experimental groups were fed the basal diet supplemented with 40, 80, 160 and 320 mg/kg isoflavones, respectively.The experiment lasted for 64 days.The results showed as follows：1） dietary supplementation of isoflavones at 160 mg/kg significantly increased plasma CAT activity （ P〈0 .05 ） , and that at 80 mg/kg significantly increased liver CAT activity （ P 〈0 .05 ） , while that at 160 mg/kg significantly inhibited liver CAT activity （P〈0.05）.2） Dietary supplementation of isoflavones at 40 and 80 mg/kg significantly decreased plasma GSSG concentration （P 〈0.05）, that at 40, 80, 160 and 320 mg/kg significantly increased plasma GSH concentration （ P〈0 .05 ） , and that at 80 and 160 mg/kg sig-nificantly decreased plasma MDA concentration （ P 〈0 .05 ） .3 ） Liver Gpx activity was decreased linearly with the increase of isoflavones supplemental level （ P〈0 .05 ） , and dietary supplementation of isoflavones at 80, 160 and 320 mg/kg significantly decreased liver Gpx activity （ P 〈0.05）.4） Pro/antioxidant balance （ PAB） value in liver did not differ among different supplemental levels, but it showed liner response to the in-crease of isoflavones supplemental level; compared with control group, dietary supplementation of isoflavones at 320 mg/kg tended to increase PAB value in plasma （ P=0 .08 ） .5 ） Average daily gain, daily feed intake and feed to gain ratio were not affected by dietary supplementation of isofalvones （ P〉0 .05 ）;the carcass indi-ces, dressing weight/percentage,
出处
《动物营养学报》
CAS
CSCD
北大核心
2014年第2期437-444,共8页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家自然科学基金(31072041)
关键词
异黄酮
肥育猪
抗
氧化
生长性能
屠体性能
肉质
isoflavones
finishing pigs
anti/pro-oxidant
growth performance
carcass performance
meat quality
