Abstract:Several major nutrients contents, such as mineral elements, proteins, amino acids and vitamins，from fresh leaves and stems of Urtica fissa were analyzed, and the protein nutritive value was evaluated by using fuzzy identifyication mode and ratio coefficient of amino acid. The results showed that the contents of niacin, dietary fiber and the most mineral elements in U. fissa were higher than other vegetables except for sodium (Na) and selenium (Se). The protein content in U. fissa reach up to 6.2% (fresh weight). The essential amino acids (EAA) in U. fissa were complete, accounting for 41.69% in total amino acid. The close degree of protein in U. fissa is 0.8667, the score of ratio coefficient of amino acid is 62.53. The first limited amino acid is sulfur-containing amino acids, Methionine and Cysteine. The content of mercury (Hg), lead (Pb) and arsenic (As) in U. fissa did not exceed the standards of limited gauge of the vegetable. Therefore, it suggested that U. fissa can serve as a safe wild vegetable.
