Abstract: In order to evaluate the nutrition and quality of Porphyra haitanensis at different harvesting stages in Shantou area, the basic nutritional components, amino acids, fatty acids, inorganic elements were analyzed, and its nutritional value was investigated.The results showed that there were significant differences in the contents of protein, total sugar, crude fiber, ash and fat with the harvest periods (P<0.05). A total of 17 amino acids were detected in Porphyra haitanensis, among which the highest contentreached 34.62 g·100g^-1 in the last harvest of Porphyra haitanensis and the lowest was 30.87 g·100g^-1 in the second harvest of Porphyra haitanensis. According to the nutritional evaluation by amino acids score (AAS) and chemical score (CS), the first restricted amino acid was Met. A total of 13 to 16 fatty acids were detected in the Porphyra haitanensis at different harvesting stages, all of which contained a high proportion of unsaturated fatty acids. 12 kinds of inorganic elements were detected in Porphyra haitanensis at different harvesting stages, including four major elements such as Na, Mg, K, and Ca, and eight trace elements such as Mn, Fe, Cu, Zn, As, Se, Cd, and Pb. This research provided a scientific basis for the sustainable and healthy development of Porphyra haitanensis processing in China.

Key words: Porphyra haitanensis, nutritional composition, amino acids, fatty acids, inorganic elements

摘要： 为探讨不同采收期坛紫菜的营养和开发利用价值,本研究对不同采收期坛紫菜中的基本营养成分、氨基酸、脂肪酸和无机元素进行测定分析,并对其营养价值进行了评价。结果表明,坛紫菜蛋白质、总糖、粗纤维、灰分和脂肪含量随采收期的变化均存在显著差异(P<0.05)。坛紫菜中共检出17种氨基酸,其中末水紫菜氨基酸含量最高,为34.62 g·100g^-1,二水紫菜含量最低,为30.87 g·100g^-1。以氨基酸评分和化学评分为标准,蛋氨酸(Met)为各采收期坛紫菜的第一限制性氨基酸。不同采收期的坛紫菜共检出13~16种脂肪酸,均含有高比例的不饱和脂肪酸。不同采收期的坛紫菜均检出12种无机元素,包括Na、Mg、K、Ca 4种常量元素和Mn、Fe、Cu、Zn、As、Se、Cd、Pb 8种微量元素。本研究结果为我国坛紫菜加工产业的持续、健康发展提供了一定的科学依据。

关键词: 坛紫菜, 营养成分, 氨基酸, 脂肪酸, 无机元素