| How different nitrogen fertilizers affect arsenic mobility in paddy soil after straw incorporation? | |
Liu, Lin ; Shen, Rui-Lin; Zhao, Zhong-Qiu; Ding, Long-Jun; Cui, Hui-Ling; Li, Gang; Yang, Yu-Ping; Duan, Gui-Lan; Zhu, Yong-Guan
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| 2022-08-15 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
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| ISSN | 0304-3894 |
| Volume | 436Issue:0Pages:129135 |
| Abstract | In straw return fields, nitrogen-fertilizers are added to mitigate microbial competition for nitrogen with plants. However, in arsenic (As)-contaminated paddy fields, the specific effects of different nitrogen fertilizers on As mobility after straw incorporation and the interactions among iron(Fe)/carbon(C)/nitrogen(N)/As are not well understood. In the reported microcosm experiment we monitored As-mobility as a function of different dosages of KNO3, NH4Cl and rice straw incorporation. Addition of both KNO3 and NH4Cl significantly inhibited the As mobilization induced by straw incorporation. Following the KNO3 addition, the As concentration in porewater dropped by 51-66% after 2 days of the incubation by restraining Fe reduction and enhancing Fe oxidation. High-dose NH4Cl addition reduced As in porewater by 22-43% throughout the incubation by decreasing porewater pH. High-throughput sequencing results demonstrated that KNO3 addition enriches both the denitrifying and Fe-oxidizing bacteria, while diminishing Fe reducing bacteria; NH4Cl addition has the opposite effect on Fe-reducing bacteria. Network analysis revealed that As and Fe concentrations in porewater were positively correlated with the abundance of denitrifying and Fe-reducing bacteria. This study broadens our insight into the As biogeochemistry associated with the N/C/Fe balance in soil, which are of great significance for agronomic management and mitigation the risk of As-contaminated paddy fields. |
| Department | 城市与区域生态国家重点实验室 ; 城市与区域生态国家重点实验室 |
| Keyword | DISSIMILATORY NITRATE REDUCTION FE(II) OXIDATION REDUCING BACTERIA IRON-OXIDES RICE RELEASE ACCUMULATION DIVERSITY RHIZOSPHERE COMMUNITIES |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47274 |
| Collection | 城市与区域生态国家重点实验室 |
| Corresponding Author | Duan, Gui-Lan |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.China Univ Geosci Beijing, Coll Land Sci & Technol, Beijing 100083, Peoples R China 3.Northwest A&F Univ, Coll Life Sci, State Key Lab Crop Stress Biol Arid Areas, Shaanxi Key Lab Agr & Environm Microbiol, Yangling 712100, Shanxi, Peoples R China 4.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China 5.Beijing Univ Agr, Key Lab Northern Urban Agr Minist Agr & Rural Affa, Beijing 102206, Peoples R |
| Recommended Citation GB/T 7714 | Liu, Lin,Shen, Rui-Lin,Zhao, Zhong-Qiu,et al. How different nitrogen fertilizers affect arsenic mobility in paddy soil after straw incorporation?[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,436(0):129135. |
| APA | Liu, Lin.,Shen, Rui-Lin.,Zhao, Zhong-Qiu.,Ding, Long-Jun.,Cui, Hui-Ling.,...&Zhu, Yong-Guan.(2022).How different nitrogen fertilizers affect arsenic mobility in paddy soil after straw incorporation?.JOURNAL OF HAZARDOUS MATERIALS,436(0),129135. |
| MLA | Liu, Lin,et al."How different nitrogen fertilizers affect arsenic mobility in paddy soil after straw incorporation?".JOURNAL OF HAZARDOUS MATERIALS 436.0(2022):129135. |
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