RELATIONSHIPS BETWEEN THE SELENIUM CONTENT IN FLUE-CURED TOBACCO LEAVES AND THE SELENIUM CONTENT IN SOIL IN ENSHI, CHINA TOBACCO-GROWING AREA
ZICHENG XU*, HUIFANG SHAO, SU LI AND CONG ZHENG
Abstract:
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-1 with the mean of (8.37±5.83) mg·kg-1.The
content of selenium in flue-cured tobacco among different positions was
X2F>C3F>B2F, 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-1 with 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, 
was 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.
College of Tobacco Science, Henan Agricultural University, 450002 Zhengzhou, China
*Corresponding author’s e-mail: zichengxu@126.com