preliminary analysis on stalk position characteristic of inorganic elements in tobacco leaves in different ecological regions indicated that Cu, P, S, Mo and B contents were higher in upper leaves. Fe, Mg, Si, and Pb contents were higher in lower leaves. Se and Zn contents were higher in upper leaves in south area, but higher in lower leaves in north area. The distribution of Mn, Ca and Cd vary with stalk position, significant difference was noticed between different ecological regions. The stalk position characteristic of inorganic elements in southern tobacco leaves was significant, the average variation coefficient was 29.23%. The stalk position characteristic of inorganic elements in northern tobacco leaves was not obvious, the average variation coefficient was 16.13%. The distribution of Mn and P among stalk positions in Guizhou type leaves tended to northern leaves.
Chinese Tobacco Science
stalk position characteristic