|
| Effects of soluble organic carbon fluorescence components on arsenic methylation in paddy soil |
| Received:December 09, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:3D excitation-emission-matrix;paddy soil;organic material;arsenic methylation;straight head disease |
| Author Name | Affiliation | E-mail | | LI Lingyi | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | ZHANG Nan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | ZHANG Yang | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | WU Cuixia | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | ZENG Xibai | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | SU Shiming | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Beijing 100081, China | sushiming@caas.cn |
|
| Hits: 750 |
| Download times: 728 |
| Abstract: |
| The difference between methylated arsenic and organic carbon fluorescence components in soil solution after application of two different organic materials, straw and pig manure, was investigated through an anaerobic cultivation experiment in arsenic-contaminated paddy soil in Shangyu area of Shaoxing City, Zhejiang Province. The possible relationship between methylated arsenic and organic carbon fluorescence components was preliminarily explored. The results indicated that straw and pig manure treatment at different addition levels significantly affected the content of methylated arsenic in soil solution. After 5 days of anaerobic cultivation, methylated arsenic increased by approximately 40.3%, 24.2%, and 24.0% under three application levels of pig manure addition(0.5%, 1.0%, and 1.5%, respectively, calculated based on total organic carbon); the increment of methylated arsenic under pig manure treatment was lower than that under straw treatment, with an increase of 15.5%, 6.9% and 3.8% under three application levels of pig manure addition(0.5%, 1.0%, and 1.5%, respectively, calculated based on total organic carbon). The consumption of total organic carbon in soil solution was significantly positively correlated with the increase of methylated arsenic after anaerobic cultivation(P<0.05). Significant differences were observed in the fluorescence composition and properties of organic carbon in soil solution under straw and pig manure treatment; the organic carbon from straw source had lower humification degree, higher bioavailability and more soluble microbial products(SMP), aromatic protein Ⅰ(APⅠ), and aromatic protein Ⅱ(AP Ⅱ). After 5 days of anaerobic cultivation, the fluorescence index, aromatic proteins, fulvic acid(FA), and humic acid(HA)were significantly positively correlated with the content of methylated arsenic(P<0.05), and the humification index was negatively correlated with methylated arsenic content(P>0.05). In summary, the organic carbon fluorescence components are significantly different after degradation of different types of organic materials; AP Ⅱ, FA, and HA contents may be important factors affecting arsenic methylation. |
|
|
|
