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| Amelioration and Reutilization of Lead Contaminated and Acidified Farmland |
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| KeyWord:lead; soil acidification; amelioration; hybrid giant napier; sugarcane |
| Author Name | Affiliation | | MEI Juan | Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China
Shanxi University, Taiyuan 030006, China | | XIE Hua | Scientific Research Academy of Guangxi′s Environmental Protection , Nanning 530022, China | | YAN Xiu-lan | Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China | | LI Hua | Shanxi University, Taiyuan 030006, China | | LIAO Xiao-yong | Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China |
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| Abstract: |
| Exploring measures for ameliorating and reutilizing heavy metal contaminated soils attracts wide-ranging interest. A field experiment was conducted on farmland with lead contamination and soil acidification. Four treatments including lime-sodium hydroxide（LS）, lime-sodium hydroxide and organic fertilizer（LSO）, lime-sodium hydroxide and silkworm excrement（LSS） and control（CK） were used. To some extent, all amelioration treatments improved soil pH and organic matter, promoting plant growth. Amendments slightly decreased lead accumulation in the shoots of sugarcane. However, lead concentrations in the juice and sucrose exceeded the food health standards, posing a great healthy risk. Compared with the control, amelioration treatments reduced lead contents of hybrid giant napier（Pennisetum hydridum）by 39 to 88%, and plant lead concentrations were within the "feed hygiene standards"（GB 13078—2001）. These results suggest that heavy metal contaminated soils could be used to grow hybrid giant napier for feeds with lower health risks after being ameliorated. |
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