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>Relationships between the selenium content in flue-cured tobacco leaves and the selenium content in soil in Enshi, China tobacco-growing area
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Relationships between the selenium content in flue-cured tobacco leaves and the selenium content in soil in Enshi, China tobacco-growing area
Relationships between the selenium content in flue-cured tobacco leaves and the selenium content in soil in Enshi tobacco-growing area were analyzed. The results indicated that: (1) The selenium content in flue-cured tobacco leaves in Enshi was high, ranging from 0.30 to 29.30 mg·kg-1with the mean of (8.37±5.83) mg·kg-1.The content of selenium in flue-cured tobacco among different positions was X2FC3FB2F, among different altitudes was medium altitude(800m~1200m)high altitude(≥1200m)low altitude (800m). (2) The selenium content in soil in Enshi tobacco-growing area was high，ranging from 0.28 to 7.03 mg kg-1with the mean of (2.56±1.64) mg kg-1．Most of the soil was selenium-rich and high-selenium soil, and 34.44% of soil was excessive-selenium soil. As the soil thickness deepened, the selenium contents in soil became lower and lower, and the same trend was observed in the selenium content of flue-cured tobacco leaves at different altitudes. (3) There was significantly positive-correlation between the selenium content in soil and the selenium content of flue-cured tobacco leaves (correlation coefficient was 0.949). Based on the correlation analysis, the regression equation, 1647.89628.12494.11082.0.23+.+.=xxxywas established between soil available selenium and the selenium content in flue-cured tobacco leaves for 72 samples. Regression equation reached a significant level by F-test.
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