Factors Analysis Of Affecting Heavy Metals Content And Quality In Flue-Cured Tobacco

Hunan is a major producer of tobacco production in China,In particular,the production of Strong flavor type tobacco leaf is the main raw material for some popular cigarette brands in the market.Therefore,to develop ecological safety of tobacco and low content heavy metal raw materials production in Hunan,that is great significance to enhance the safety of raw material supply and to create low hazard cigarette products.Based on the analysis of the correlation between soil nutrients and heavy metals in different areas and the adsorption capacity of heavy metals in Different Flue-cured Tobacco Varieties.And the correlation analysis of mineral elements and heavy metals in tobacco leaves,to revealed the correlation between genotypes,soil nutrients and tobacco quality and heavy metals.The research provides theoretical and experimental basis for exploring the effective ways and methods to reduce the heavy metal content in tobacco leaves.The main results are as follows:1,The soil samples were collected for analysis of pH and nutrients and heavy metal content of the correlation results showed that there were very significant negative correlation with arsenic content in soil pH value,soil organic matter and heavy metals such as cadmium,mercury,arsenic and lead were positively correlated with Cr,the correlation is not significant.There was no correlation between soil available nitrogen and available potassium and the contents of 5 kinds of heavy metals.Soil cadmium and available phosphorus,potassium,showed a significant negative correlation with available Fe,Mn and Zn;mercury and phosphorus,potassium and available iron showed significant negative correlation,and significantly positive correlation with the available copper and zinc;chromium and phosphorus,potassium,a extremely significant positive correlation between available manganese,available copper and zinc;arsenic and potassium was negatively correlated;lead and phosphorus,potassium,iron and copper was negatively correlated,positively correlated with Zn.2,The results of comparative test of Different Flue-cured Tobacco Varieties,there were significant differences in the accumulation of heavy metals in 8 Flue-cured Tobacco Varieties,Among them,the effect of Yunyan 87,Yunyan97,Yueyan97,and K326 on the accumulation of heavy metals was relatively strong,and the effect of the accumulation of heavy metals in the other 4 varieties was relatively weak..The lower yellow leaves fall earlier,shorter growth period,agronomic traits of flue-cured tobacco varieties growing worse,but the strong accumulation of heavy metals,the lower yellow leaves,slower growth period is longer,the vigorous agronomic traits of flue-cured tobacco varieties better,relatively weak on the enrichment of heavy metals.3.The results show that the heavy metal accumulation and not related to tobacco leaf iron and copper;heavy metal mercury and chlorine and magnesium ions were positively correlated,negatively correlated with zinc ion;tobacco arsenic with chlorine,magnesium and calcium were positively correlated;tobacco heavy metal lead and chloride,magnesium,calcium,manganese and zinc was negatively correlated;tobacco cadmium and zinc and potassium was negatively correlated with potassium chromium;tobacco only showed a significant negative correlation.Thus,with the accumulation of heavy metals is the most closely related monovalent anion chloride and two valent magnesium and calcium and zinc and monovalent potassium ion,zinc ion and tobacco can reduce the absorption of mercury,lead and cadmium accumulation of tobacco absorption of chlorine and magnesium and calcium and manganese ions,to a certain extent to prevent the heavy metal lead accumulation.