【作者】 王燕； 蒋宗勇； 林映才； 郑春田； 蒋守群； 陈芳； 马现永；

【Author】 WANG Yan JIANG Zong-yong (Institute of Animal Science,Guangdong Academy of Agricultural Science, Ministry of Agriculture Key Laboratory of Animal Nutrition and Feed Science (South China).Guangzhou 510640,China)

【机构】 广东省农业科学院畜牧研究所农业部动物营养与饲料(华南)重点开放实验室；

【摘要】 选用64头体重约60kg的杜×长×大三元杂交肥育猪,依体重随机分为4组,每组4个重复。各处理组饲粮硒添加水平分别为0（对照组）、0.15、0.30 mg/kg（硒代蛋氨酸）、0.30mg/kg（亚硒酸钠）。试猪饲养至95kg左右结束试验,屠宰并取样测定,研究硒代蛋氨酸对肥育猪生产性能和肌肉品质的影响。结果表明:（1）饲粮添加不同水平硒代蛋氨酸或亚硒酸钠未影响肥育猪日增重、日采食量、料重比（P>0.05）。（2）饲粮添加不同水平Se-Met或Na₂SeO₃未显著影响肥育猪背最长肌剪切力和肌内脂肪含量（P>0.05）。各硒处理组猪宰后12h背最长肌pH值均显著高于对照组（P<0.05）。与对照组相比,添加Se-Met或Na₂SeO₃显著降低了宰后不同时间点肉色L*值（P<0.05）,提高了肉色a*值（P<0.05）,0.15mg/kgSe（Se-Met）处理也显著降低宰后12h肉色b*值（P<0.05）。硒处理组背最长肌滴水损失均有降低趋势,但与对照组相比差异不显著（P>0.05）。（3）0.30mg/kgSe（Se-Met）组背最长肌乳酸含量显著低于对照组（P<0.05）。0.30mg/kgSe（Se-Met）和Na₂SeO₃组氧合肌红蛋白含量都显著高于对照组（P<0.01）和0.15mg/kgSe（Se-Met）组（P<0.05）。更多还原

【Abstract】 A total of 64 crossbred(Duroc×Landrace×Largewhite) pigs(initial BW,60kg) were randomly allotted to four treatments on the basis of weight following a randomized complete block design.Each treatment was replicated four times.Pigs were fed corn-soybean meal-based diets supplemented with 0 (control) or 0.15 mg/kg and 0.30 mg/kg Se from Se-Met or 0.30mg/kg Se from sodium selenite(SS), respectively.One barrow per pen was slaughtered when all the pigs were weighed about 95kg on average to investigate the effects of Se-Met addition on performance and pork quality in finishing pigs.Results showed that:(1) There were no significant differences in average daily gain,average daily feed intake, feed:gain among all groups(P>0.05).(2) Shear force and intramuscular fat content of porcine longissimus muscle were not affected by Se addition(P>0.05).All Se-added groups presented significantly higher pH value at 12h post-slaughter than the control(P<0.05).Meat color L~* value was significantly decreased and a~* value was significantly improved at different time points post-slaughter in all Se-added groups in contrast with the control(P<0.05),also 0.15 mg/kg Se(Se-Met) supplementation significantly decreased meat color b~* value at 12h post-slaughter(P<0.05).Drip loss of longissimus muscle had a downward trend in all Se-added groups compared to control(P>0.05).(3) Lactic acid content of longissimus muscle was significantly decreased in 0.30mg/kg Se(Se-Met) groups compared to control(P<0.05).0.30mg/kg Se (Se-Met) and SS groups significantly increased oxymyoglobin content of muscle compared to both control(P<0.01) and 0.15mg/kg Se(Se-Met) groups(P<0.05).更多还原