Slash-and-char: An ancient agricultural technique holds new promise for management of soils contaminated by Cd, Pb and Zn
| Autor: | Li-qin Niu, Wen-Sheng Shu, Jialiang Kuang, Shaopeng Li, Xiao-xin He, Jin-tian Li, Wen-Hua Zhou, Pu Jia, Bin Liao |
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| Rok vydání: | 2015 |
| Předmět: |
China
Health Toxicology and Mutagenesis chemistry.chemical_element Toxicology complex mixtures Slash-and-char Metals Heavy Biochar Vegetables Soil Pollutants Charcoal Environmental Restoration and Remediation Cadmium Agriculture General Medicine Contamination Pollution Soil contamination Zinc Agronomy chemistry Lead visual_art Soil water visual_art.visual_art_medium Environmental science |
| Zdroj: | Environmental pollution (Barking, Essex : 1987). 205 |
| ISSN: | 1873-6424 |
| Popis: | Heavy metal contamination of agricultural soils is of worldwide concern. Unfortunately, there are currently no efficient and sustainable approaches for addressing this concern. In this study, we conducted a field experiment in which an agricultural soil highly contaminated by cadmium (Cd), lead (Pb) and zinc (Zn) was treated on-site by an ancient agricultural technique, 'slash-and-char', that was able to convert the biomass feedstock (rice straw) into biochar in only one day. We found evidence that in comparison to the untreated soil, the treated soil was associated with decreased bioavailability of the heavy metals and increased vegetable yields. Most importantly, the treatment was also coupled with dramatic reductions in concentrations of the heavy metals in vegetables, which made it possible to produce safe crops in this highly contaminated soil. Collectively, our results support the idea that slash-and-char offers new promise for management of soils contaminated by Cd, Pb and Zn. |
| Databáze: | OpenAIRE |
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