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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
2022-08-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume436Issue:0Pages:129135
AbstractIn 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
KeywordDISSIMILATORY NITRATE REDUCTION FE(II) OXIDATION REDUCING BACTERIA IRON-OXIDES RICE RELEASE ACCUMULATION DIVERSITY RHIZOSPHERE COMMUNITIES
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47274
Collection城市与区域生态国家重点实验室
Corresponding AuthorDuan, Gui-Lan
Affiliation1.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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