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| Soil property effects on and prediction models of lead and cadmium concentrations in tobacco leaves |
| Received:April 03, 2015 |
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| KeyWord:tobacco leaf;lead;cadmium;soil properties;prediction |
| Author Name | Affiliation | E-mail | | HU Xin | College of Resources and Environmental Science, Hunan Agricultural University, Changsha 410128, China | | | LUO Zhen-hua | Zhuzhou Branch of Hunan Tobacco Company Zhuzhou, Zhuzhou 412000, China | | | XIE Hui-ya | Zhuzhou Branch of Hunan Tobacco Company Zhuzhou, Zhuzhou 412000, China | | | ZHOU Yi | Zhuzhou Branch of Hunan Tobacco Company Zhuzhou, Zhuzhou 412000, China | | | YAN Zhe | College of Resources and Environmental Science, Hunan Agricultural University, Changsha 410128, China | | | PENG Liang | College of Resources and Environmental Science, Hunan Agricultural University, Changsha 410128, China | | | ZENG Qing-ru | College of Resources and Environmental Science, Hunan Agricultural University, Changsha 410128, China | qrzeng@163.com |
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| Abstract: |
| Plant heavy metal content is greatly affected by soil properties. In this paper, 112 flue-cured tobacco leaf and corresponding soil samples were collected from typical tobacco growing areas in Hunan Province to analyze soil properties and plant lead and cadmium content. Correlationship between Pb and Cd content in tobacco leaves and soil properties were studied. Results showed that the average values of soil total Pb and Cd were 40.91 mg·kg-1 and 0.37 mg·kg-1 and those of soil available Pb and Cd 10.71 mg·kg-1 and 0.23 mg·kg-1, respectively. The average content of Pb and Cd in flue-cured tobacco leaves was respectively 3.86 mg·kg-1 and 7.55 mg·kg-1, with enrichment factor of 0.094 and 19.84. This indicated that cadmium had higher health risks than lead. Lead in tobacco was positively correlated with soil total and available Pb, but negatively correlated with soil pH. The content of Cd in tobacco was positively correlated with soil total and available Cd, organic matter, and chloride content, but negatively with soil pH. The optimal prediction models for Pb and Cd content in tobacco were lgYtobac-Pb=0.806lgXsoilPb-0.314pH-0.02(R2=0.499), and lgYtobac-Cd=0.877XsoilCd-0.302pH+0.465lgXOM+1.632(R2=0.561), with good prediction. |
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