Liu Hongyan, Wei Yimin, Wei Shuai, Jiang Tao, Zhang Senshen, Guo Boli
Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China.
Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China.
Food Chem. 2017 Jul 1;226:135-140. doi: 10.1016/j.foodchem.2017.01.029. Epub 2017 Jan 7.
The study aims to investigate whether stable hydrogen isotopic ratio (δH) in wheat and soil water can be used as the fingerprint for geographical origin of wheat. Wheat was planted in three different regions in China across two years. The δH values were determined for soil water in three growth periods, and rainwater, groundwater, and defatted wheat in the maturity stage. The δH values both in soil water and defatted wheat showed significant differences among different regions and the changing trend of δH value in wheat was consistent with that in soil water and rainwater, but different from that in groundwater. The δH values in soil water in the depth of 0-20cm in the maturity stage were positively correlated to the δH values of defatted wheat (y=0.205x-52.628, r=0.645) and could be used as the potential indicator for tracing wheat geographical origin.
本研究旨在探讨小麦及土壤水分中的稳定氢同位素比率（δH）是否可作为小麦地理来源的指纹特征。连续两年在中国三个不同地区种植小麦。测定了三个生育期土壤水分、成熟期雨水、地下水及脱脂小麦的δH值。土壤水分和脱脂小麦中的δH值在不同地区间存在显著差异，小麦中δH值的变化趋势与土壤水分和雨水中的一致，但与地下水中的不同。成熟期0-20cm深度土壤水分中的δH值与脱脂小麦的δH值呈正相关（y=0.205x-52.628，r=0.645），可作为追溯小麦地理来源的潜在指标。
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