三七各部位氢氧同位素特征及其与灌溉水关系

分析不同产地三七各部位（茎叶、芦头、块根、筋条、须根）及灌溉水中稳定氢氧同位素特征、相关性及影响因素，为其能否作为产地溯源指标提供技术支撑。在三七产区——广西靖西片区、云南文山片区、云南新拓展片区采集43个春三七样点植株和相应的灌溉水并测定其稳定氢氧同位素比率，现场测定经纬度、海拔，进行差异分析和相关性分析。结果表明，三七各部位δD符合随海拔、纬度增加而降低的规律。而δ¹⁸O的变化规律则与δD相反。三七各部位δD、δ¹⁸O值具有显著差异（P<0.05），变化规律各异。三七各部位δ¹⁸O地域特征明显，除块根、筋条、须根外其余部位可相互预测，均可作为产地溯源指标。三七产区灌溉水中δD、δ¹⁸O之间呈极显著正相关，具有明显的经度、纬度、及高程效应，但仅芦头δD与灌溉水δD呈显著正相关。研究结果可为三七产地溯源提供理论依据。

Hydrogen and Oxygen Isotope Characteristics of Different Organs of Panax Notoginseng and its Relationship with Irrigation Water

Analyze the characteristics, correlation and influencing factors of various organs (stems and leaves, reed heads, tubers, tendons, fibrous roots) of Panax notoginseng from different origins and stable hydrogen and oxygen isotopes in irrigation water, and provide technical support for whether it can be used as a traceability indicator of origin. In the Panax notoginseng production area—Jingxi Guangxi area, Wenshan Yunnan area, Yunnan new development area, 43 Spring Panax notoginseng plants and corresponding irrigation water were collected and their stable hydrogen and oxygen isotope ratios were determined. The latitude, longitude and altitude were measured on site, and carried out difference analysis and correlation analysis. The results show that the δD of each organ of Panax notoginseng conforms to the law of decreasing with the increase of altitude and latitude. The change law of δ¹⁸O is opposite to δD. The δD and δ¹⁸O values of various organs of Panax notoginseng have significant differences（P<0.05）, and the changing laws are different. The δ¹⁸O of the organs of Panax notoginseng has obvious regional characteristics, and the other organs except the tuber, tendons, and fibrous roots can be mutually predicted, and can be used as the origin traceability index. There is a very significant positive correlation between δD and δ¹⁸O in irrigation water in the Panax notoginseng production area, with obvious longitude, latitude, and elevation effects, but only the δD of reed head and irrigation water δD have a significant positive correlation. The results can provide a theoretical basis for the traceability of the origin of Panax notoginseng.