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| Accumulation of Soil Mercury by Different Indica Rice(Oryza sativa L.) Cultivars |
| Received:December 25, 2014 |
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| KeyWord:brown rice;accumulation;indica rice;mercury;soil |
| Author Name | Affiliation | E-mail | | TIAN Tian | College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | CHEN Yan-hui | College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | CHEN Chun-le | College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | XIE Tuan-hui | College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | WANG Guo | College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China | 1400619353@qq.com |
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| Abstract: |
| Different plants have showed various abilities to accumulate heavy metals from soils. In this study, 283 rice grain samples of 19 indica rice cultivars(including conventional, two-line hybrid and three-line hybrid indica rices) and 283 corresponding surface soils were collected from 9 districts of Fujian Province. Mercury(Hg) concentrations in both rice grains and soils were determined. Total soil Hg concentrations varied from 0.02 mg·kg-1 to 1.81 mg·kg-1, of which 37% samples contained Hg exceeding the secondary level limit of the National Soil Environmental Quality. The Hg concentrations in brown rice grains ranged from 0.13 μg·kg-1 to 41.78 μg·kg-1, of which only 3.2% samples contained Hg greater than the limit of the National Standards for Pollutants in Food(GB 2762-2012). There was no significant correlation between Hg concentrations in brown rice and total or available Hg in soil. No significant difference in Hg concentrations of brown rice between hybrid and conventional indica rice(P>0.05) was observed. Brown rice Hg content in three-line hybrid indica cultivars was higher than that in two-line hybrid indica cultivars, but the difference between them was not significant(i.e., P>0.05). Two-line hybrid indica rice cultivars showed lower Hg accumulating capability than three-line hybrid indica rice did. The present results indicate that two-line hybrid indica rice is the strain of low Hg accumulation. |
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