阿坝大骨节病病区青稞中蛋白质营养价值评价  

Nutritional Assessment of Proteins in Highland Barleys Grown in High-incidence Areas of Kashin-beck Disease in Aba, Sichuan

作　　者：张璐[1] 蒲彪[1] 陈安均[1] 刘兴艳[1] 

机构地区：[1]四川农业大学食品学院,四川雅安625014

出　　处：《食品科学》2013年第23期296-299,共4页Food Science

基　　金："十一五"国家科技支撑计划项目(2007BAI25B01)

摘　　要：为评价病区青稞中蛋白质的营养价值,采用国际上通用的评价方法对阿坝大骨节病重病区青稞中的蛋白质进行评价,并与中病区、非病区的青稞进行比较。结果表明:中病区必需氨基酸占其氨基酸总量的33.69%,重病区必需氨基酸占其氨基酸总量的33.99%,较非病区的36.05%低。重病区、中病区青稞的氨基酸评分(AAS)、必需氨基酸指数(EAAI)、氨基酸比值系数分(SRCAA)都较非病区低,非病区青稞的蛋白质营养价值较高,重病区和中病区青稞氨基酸组成不平衡,蛋白质的质量较差,利用率较低。青稞的第一限制氨基酸为赖氨酸,重病区与中病区第二限制氨基酸为蛋氨酸+胱氨酸,非病区的第二限制氨基酸为苏氨酸;赖氨酸的评分在病区与非病区间差异显著(P<0.05)。阿坝大骨节病病区青稞蛋白质营养价值低,膳食中高比例的青稞摄入可能导致体内含硫氨基酸和赖氨酸的缺乏。The nutritional value of proteins in highland barleys grown in several high-incidence areas of Kashin-Beck disease （KBD） in Aba prefecture, Sichuan province was evaluated by internationally recognized methods in comparison to those from medium-incidence and non-incidence areas in the same prefecture. The results showed that the ratio of essential to total amino acids in highland barleys from medium-incidence areas was 33.69% compared to 33.99% for those from high- incidence areas and 36.05% for those from non-incidence areas. The amino acid score （AAS）, essential amino acid index （EAAI） and score of ratio coefficient of amino acid （SRCAA） of highland barleys from both high- and medium-incidence areas were lower than those of highland barleys from non-incidence areas. The nutritional value of proteins in highland barleys from non-incidence areas was higher, whereas those from high- and medium-incidence areas had an unbalanced am ino acid composition, inferior protein quality and lower protein utilization. The first limiting amino acid in highland barleys was Lys for the three areas, and the second limiting amino acids were Met and Cys for high- and medium-incidence areas and Thr for non-incidence areas. The average amino acid scores of Lys in highland barleys showed a significant difference between incidence and non-incidence areas （P 〈 0.05）. In conclusion, proteins in highland barleys from high- and mediumincidence areas of KBD in Aba, Sichuan have a low nutritional value and high dietary consumption of highland barleys may lead to deficiency of sulphur-containing amino acids and Lys in the body.

关 键 词：青稞 氨基酸 氨基酸评分 必需氨基酸指数 

分 类 号：R151.3[医药卫生—营养与食品卫生学]