酵母硒和枣粉饲粮对鸡肉宰后氧化及氨基酸的影响研究

为研究酵母硒和枣粉饲粮对白羽肉鸡鸡胸肉成熟过程中蛋白质氧化及氨基酸含量变化的影响,本试验采用不同浓度酵母硒和枣粉饲喂白羽肉鸡42 d,根据酵母硒和枣粉添加量分为6个处理组,分别为CK(基础日粮)、J组(基础日粮+8％枣粉替换8％玉米)、0.3S(基础日粮+0.3 mg·kg-1酵母硒)、0.6S(基础日粮+0.6 mg...

Effects of Yeast Selenium and Jujube Powder Diet on Post-Mortem Oxidation and Amino Acids of Chicken

In order to study the effects of yeast Selenium and Jujube powder on protein oxidation and amino acid composition of white feathered broiler(AA)during maturation,six treatments on ASS were carried out for 42 days by combining content of yeast selenium and jujube powder(CK,basal diet;J,basal diet+8%jujube powder to replace 8%corn;0.3 S,basal diet+0.3 mg·kg^-1 yeast selenium;0.6 S,basal diet+0.6 mg·kg^-1 yeast selenium;0.3 S+J,basal diet+0.3 mg·kg^-1 yeast selenium+8%jujube powder to replace 8%corn;0.6 S+J,basal diet+0.6 mg·kg^-1 yeast selenium+8%jujube powder to replace 8%corn).The variation of indexes including carbonyl content,sulfhydryl content,disulfide bond content,dimeric tyrosine content,surface hydrophobicity,and amino acid content were analyzed with five different aging duration times(0,12,24,48 and 72 hours).The results showed that the content of carbonyl group,disulfide bond,dimeric tyrosine,and surface hydrophobicity increased with a longer aging time(P<0.05),while the content of sulfhydryl group and total amino acid decreased gradually(P<0.05).Compared with CK treatment,white feathered broilers fed with Selenium yeast and jujube powder can reduce the oxidation degree of protein of chicken breast.In addition,there was a positive effect to inhibit the oxidation of protein and decrease of amino acids in 0.6 S+J treatment,among which the content of aspartic acid,threonine,serine,glutamic acid,glycine,alanine,cystine,valine,methionine,isoleucine,tyrosine,alanine,lysine,histidine,arginine and proline was significantly higher than other treatments.In conclusion,the oxidation of protein and loss of amino acids were exacerbated during aging,which could be inhibited by the addition of yeast selenium and Jujube powder in the diet.The best result was detected in the 0.6 S+J treatment.The results of this study would provide a valuable theoretical basis and data support for the application of selenium yeast and jujube powder in diet.