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| Selenium contents of farmland soils and their relationship with main soil properties in Fengcheng, Jiangxi |
| Received:October 12, 2017 |
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| KeyWord:soil selenium;land use;Jiangxi;Fengcheng;soil physic-chemical properties |
| Author Name | Affiliation | E-mail | | HAN Xiao | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | ZHOU Yue | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | WU Wen-liang | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | MENG Fan-qiao | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | mengfq@cau.edu.cn |
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| Abstract: |
| Fengcheng City, one of China's most important farming regions, contains soil that is rich in selenium(Se). This study analyzes the Se contents and Se distribution within 0~100 cm profiles under different land use(paddy and upland), as well as the relationship between Se contents and the physio-chemical properties of the soil. The results showed that the average soil Se content was 0.49 mg·kg-1(arithmetic mean) for farmland soils of Fengcheng; among which 41.2% and 99% soils had Se contents higher than 0.4 and 0.125 mg·kg-1, respectively. Se was accumulated in the surface layer of farmland soils and its content was stable and lower in the 60~100 cm layer. In Se-rich soils, soils for paddy use had a significantly higher Se content than upland soils in the 0~40 cm layer. In the non-Se-rich soils, no significant differences in Se content were observed between paddy and upland soils across the 0~100 cm profile. Across the 0~100 cm profile, soil organic carbon had a determining effect on paddy and upland soil Se content, while soil clay content only exhibited its positive effect on soil Se content for paddy use. Soil pH tended to reduce the soil Se content and other soil properties including total Fe, total Al and CEC showed the effects of increasing soil Se content. The results of our study could provide technical support for rational management and utilization of Se-rich soils in Fengcheng. |
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