摘要
研究日粮中ω6/ω3多不饱和脂肪酸(PUFA)构成比对育肥猪背最长肌脂肪酸组成和血清抗氧化指标的影响。采用质量替代法使各处理日粮ω6/ω3比例分别为26:1、19:1、12:1、8:1、6:1、3:1。选择体质量70kg左右的杜×长×大育肥猪90头,将实验猪随机分为6个处理组,每个处理15头猪,每个处理组设5个重复,每个重复3头猪。结果表明,随着日粮ω6/ω3降低:ω3 PUFA中α-亚麻酸(ALA,C18:3)、二十碳五烯酸(EPA,C20:5)的含量显著增加(P<0.05),二十二碳六烯酸(DHA,C22:6)含量各组间差异不显著(P>0.05),但也表现出升高的趋势;ω6 PUFA中亚油酸(LA,C18:2)、C20:4、C22:4含量显著降低(P<0.05);各实验组背最长肌ω6/ω3的比值显著降低;猪血清中丙二醛(MDA)有逐渐增加的趋势;各组谷胱甘肽过氧化物酶(GSH-Px)、总抗氧化能力(T-AOC)活性差异不显著(P>0.05);ω6/ω3比值为19的组的SOD活性显著高于比值为12:1、8:1、6:1、3:1的组(P<0.05)。结果表明:日粮ω6/ω3多不饱和脂肪酸构成比能不同程度调整育肥猪背最长肌脂肪酸组成,并对血清中抗氧化指标有一定的影响。
The effect of dietary ω6/ω3 polyunsaturated fatty acid （PUFA） ratio on longissimus dorsi fatty acid composition of and serum antioxidant parameters were investigated in finishing pigs with body weight of approximately 70 kg. ω6/ω3 PUFA ratios of 26：1; 19：1; 12：1; 8：1; 6：1 and 3：1 were obtained by replacing corn oil with the same amount of linseed oil. Ninety finishing Duroc × Landrace × York shine pigs of similar body weight （approximately 70 kg） were divided randomly into 6 groups of 15 pigs （5 replicates in each group, 3 pigs per replicate）. The contents of ω3 PUFAs such as ALA （Cj8：3）, EPA （C20：5） in longissimus dorsi significantly increased （P〈0.05）, and DHA （C22：6） content increased but not significantly （P〉0.05） as the dietary ω6/ω3 PUFA ratio decreased. However, the contents of ω6ω PUFAs such as LA （C18：2）, C20：4 and C22：4 significantly decreased （P〈0.05） and ω6/ω3 PUFA ratio in longissimus dorsi also showed a significant downward trend. In contrast, MDA content in porcine serum tended to gradually increase. There were no significant changes in serum GSH-Px or T-AOC activities （P〉0.05）. A significantly higher level of serum SOD activity was obtained at an ω6/ω3 PUFA ratio of 19：1 compared to 12：1, 8：1, 6：1 and 3：1 （P〈0.05）. These results indicated that dietary ω6/ω3 PUFA ratio could modify the fatty acid composition of pork longissimus dorsi and affect serum antioxidant parameters to a certain extent.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2013年第1期272-276,共5页
Food Science
基金
"十一五"国家科技支撑计划项目(2007BAD71B03)
"十二五"国家科技支撑计划项目(2011BAD28B01-02)
关键词
ω6
ω3
育肥猪
脂肪酸组成
抗氧化指标
ω6／ω3
finishin
pi＇s
fatty acids composition antioxidant parameters
