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| Bioavailability Dynamics of Heavy Metals in Livestock and Poultry Manure Added to Different Farmland Soils |
| Received:July 06, 2014 |
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| KeyWord:pig and chicken manure;heavy metals;bioavailability |
| Author Name | Affiliation | E-mail | | ZHANG Yun-qing | College of Resources and Environment Sciences, China Agricultural University, Beijing 100193, China | | | ZHANG Tao | College of Resources and Environment Sciences, China Agricultural University, Beijing 100193, China | | | LI Yang | College of Resources and Environment Sciences, China Agricultural University, Beijing 100193, China | | | SU De-chun | College of Resources and Environment Sciences, China Agricultural University, Beijing 100193, China | dcsu@cau.edu.cn |
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| Abstract: |
| In this study, chicken manure and pig manure were applied to calcareous and acid soils to investigate the bioavailability dynamics of heavy metals in manure after 0, 1, 2, 4, and 6 months. The results showed that the concentrations of heavy metals in Chinese cabbage treated with the manure were lower than those with same amount of inorganic salts of heavy metals. The bioavailability of Cu, Zn, and Cd in both manures and Pb in chicken manure was less than that of inorganic salts of heavy metals with same amount within 0~6 months, whereas Pb in pig manure was less than that of the inorganic salt in 0~5 months but greater in 6th month. The dynamics of metal bioavailability over time showed similar trend in both soil types. The heavy metals in Chinese cabbages displayed initial decrease then increase with culture time and were the lowest in 2 months after application. The concentrations of Cu, Zn, Cd and Pb in Chinese cabbage in organic manure were 3.4%~47% of those in heavy metal inorganic salts. |
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