食用海带品系营养成分分析与评价

Chemical Analysis and Nutritional Assessment of New Varieties of Saccharina japonica

对＂海天1号＂、＂海天2号＂和＂海天3号＂3种食用海带新品系及厚叶海带的营养成分进行分析。结果表明：除灰分外,海带基本营养成分中粗蛋白、褐藻胶、甘露醇含量较高。＂海天1号＂和＂海天2号＂海带的粗蛋白含量最高,均为10.7%。＂海天3号＂海带的粗脂肪含量最少,为0.3%;＂海天1号＂海带的碘和褐藻胶含量最高,分别为0.47%和28.2%;＂海天3号＂海带的甘露醇含量最高,为15.1%。氨基酸成分分析表明几种海带的总氨基酸含量在5%-7%之间,必需氨基酸占总氨基酸的30%-40%。矿物质元素中含量较多的是Ca、Mg和Fe等元素。

The nutritional compositions of 3 new varieties of Saccharina japonica, ＂Haitian No. 1＂, ＂Haitian No. 2＂, and ＂Haitian No. 3＂, as well as Kjellmaniella crassifolia were analyzed. The results indicated that the contents of proximate composition except for ash, such as crude protein, alginate and mannitol, were higher in Saccharina japonica. The contents of crude protein in both ＂Haitian No. 1＂ and ＂Haitian No. 2＂ were the highest（10.7%）. The content of crude fat（0.3%） in ＂Haitian No. 3＂ was the lowest, and the content of mannitol（15.1%） in ＂Haitian No. 3＂ was the highest. The contents of iodine（0.47%） and alginate（28.2%） in ＂Haitian No. 1＂ were the highest among 4 algae. The amino acid composition showed that the contents of total amino acids in all the 4 algae were 5%–7%, and the contents of essential amino acids accounted for 30%–40% of the total amino acids（EAA/TAA ratio）. Calcium, magnesium and iron were more abundant than other tested mineral elements.