Study On The Confirmation Of Producing Area Of Meihe Rice By Applying Mineral Element Technology

Jilin Province is China's major high-quality japonica rice production base and is located in the world's golden grain production belt at 45° North latitude.With the advancement of grain supply reform,more and more consumers favor Jilin's geographical indication rice with its unique ecological and environmental advantages.However,in recent years,with the rapid development of economic globalization and food circulation,GI products marked by quality and geographical features have been frequently used in the actual production and distribution of food safety issues such as spurious and adulteration.The counterfeit Meihe rice is widely found in the market.The geographical indications of Meihe rice are abused,and the technology for confirming the origin of food products has also received increasing attention from researchers in various countries.More and more proven research on origins in various countries shows that mineral element fingerprinting technology is an effective means of researching and judging the true geographical origin of plant-derived products.Research on the protection of geographical indication products in the country of origin and confirmation of origin is still in its infancy.Because the discriminating factor of rice production is usually affected by the spatial variability of the nature of the paddy soil in the planting area,climate change,and regional geology and other environmental factors,For the confirmation of the origin of geographical indication rice,most of the existing researches use chemometrics methods combined with mineral element technology to classify the origin.However,there are few studies on the regional representativeness of rice samples and the spatial reliability of the provenance factors.Soil variability and its mineral element content,eco-environmental factors,and spatial correlation of rice samples need to be studied.In order to characterize the provenance of geograpHical indication rice and explore the relationship between rice and soil and ecological environment,this study used multi-mineral element fingerprinting to analyze rice samples and rhizospHeric soil in Meihekou rice production area.The spatial distribution of 10 elements such as Cu,Zn,Fe,Mn,K,Ca,Na,Mg,Pb,and Cd,Through correlation analysis,principal component analysis,and redundancy analysis,we studied the spatial correlation between the eco-environment-rice soil and paddy soil-rice,and used chemometrics to find out the provenance factors of Meihe rice.The comprehensive results showed that: Zn in Meihe rice,Pb,Fe,Mg,Cu have better stability and space representation.In order to verify the reliability and stability of Zn,Pb,Fe,Mg,and Cu as confirmation indicators for the production of mineral elements in Meihe rice,this study selected Liuhe rice with similar geograpHical location as the research object,using partial least squares discriminant analysis(OPLS-DA).The inspection of Meihe rice and Liuhe rice can be clearly divided into two categories in the OPLS-DA score map.In summary,Zn,Pb,Fe,Mg,and Cu in Meihe rice have good stability and spatial representativeness and can be used as confirmation indicators for rice production in Meihe.