| The wet procedure was adapted for sample digesting and then atomic absorption spectrophotometers were used to determine the eight elements, K, Na, Ca, Mg, Fe, Mn, Cu, Zn. The results showed that soil trace elements did not significantly differed from the trace elements of Licum Bararum L. fruits in Tongxin County, Zhongning county, Huinong county and the forest garden; in light of the trace elements, Licum Bararum L. fruits did not remarkably differ in quality among the major production regions of Ningxia, but in light of synergistic effect of the trace elements, the Fe/Mn ratio of Licum Bararum L. fruits in Zhongning county was significantly higher than those of the other three production sites while the Cu/Zn ratios in the concerned production sites did not showed significant difference. Therefore, a proper Fe/Mn ratio of Licum Bararum L. fruits was one major reason for the high quality of Licum Bararum L. fruits in Zhongning County. |