| In order to investigate the present status of nutritional quality of wheat in Hubei Province，24 samples from main production regions in 2009 and 2010 were collected and their quality indicators were detected and analyzed. The results showed as follows: (i) the average contents of 8 kinds of essential amino acids of lysine, threonine, isoleucine, valine, methionine, tryptophan, phenylalanine and leucine were 3.55 mg·g-1, 3.70 mg·g-1, 5.55 mg·g-1, 4.06 mg·g-1, 6.03 mg·g-1, 2.17 mg·g-1, 1.43 mg·g-1 and 8.79 mg·g-1, respectively. The overall average protein content of all the samples was 14.18%. The average contents of 10 kinds of non essential amino acids were 6.37 mg·g-1, 6.09 mg·g-1, 37.93 mg·g-1, 2.64 mg·g-1, 5.14 mg·g-1, 4.44 mg·g-1, 3.70 mg·g-1, 3.56 mg·g-1, 5.85 mg·g-1 and 3.50 mg·g-1, respectively. The average score of lysine was 49 as the first limiting amino acid, the average score of threonine was 70 as the second restrictive amino acid. (ii) The average contents of total nitrogen, total phosphorus and total potassium were 22.6 g·kg-1, 3.3 g·kg-1 and 3.9 g·kg-1, respectively. The total phosphorus content was more sufficient, the total potassium content was relatively insufficient. (iii) The average contents of trace elements of Fe, Mn, Cu, Zn and Se were 68.6 mg·kg-1, 43.5 mg·kg-1, 5.6 mg·kg-1, 34.8 mg·kg-1 and 0.057 mg·kg-1, respectively. The contents of Fe, Zn, and Mn were higher, the content of Cu was more appropriate, and the content of Se was lower. (iv) The average contents of heavy metals of Cd, Hg, Pb, As, Cr and Ni were 0.053 mg·kg-1, 0.003 mg·kg-1, 0.061 mg·kg-1, 0.020 mg·kg-1, 0.198 mg·kg-1 and 0.191 mg·kg-1, respectively. The content of Pb, As, Cr and Hg was relatively lower at the level of clean, while the content of Cd and Ni of some samples exceeds the limiting standard. |
基本信息
