Effects of water regimes on soil N2O, CH4 and CO2 emissions following addition of dicyandiamide and N fertilizer | |
Shaaban, Muhammad2; Khalid, Muhammad Salman1; Hu, Ronggui1; Zhou, Minghua2 | |
刊名 | ENVIRONMENTAL RESEARCH |
2022-09-01 | |
卷号 | 212页码:8 |
关键词 | Wetting-dry cycle Greenhouse gases Dissolved organic C Mineral nitrogen Nitrification inhibitor |
ISSN号 | 0013-9351 |
DOI | 10.1016/j.envres.2022.113544 |
英文摘要 | Water regimes strongly impact soil C and N cycling and the associated greenhouse gases (GHGs, i.e., CO2, CH4 and N2O). Therefore, a study was conducted to examine the impacts of flooding-drying of soil along with application of nitrogen (N) fertilizer and nitrification inhibitor dicyandiamide (DCD) on GHGs emissions. This study comprised four experimental treatments, including (i) control (CK), (ii) dicyandiamide, 20 mg kg-1 (DCD), (iii) nitrogen fertilizer, 300 mg kg-1 (N) and (iv) DCD + N. All experimental treatments were kept under flooded condition at the onset of the experiment, and then converted to 60% water filled pore space (WFPS). At flooding stage, N2O emissions were lower as compared to 60% WFPS. The highest cumulative N2O emission was 0.98 mg N2O-N kg- 1 in N treated soil due to high substrates of mineral N contents, but lowest (0.009 mg N2O-N kg- 1) in the DCD treatment. The highest cumulative CH4 emissions (80.54 mg CH4-C kg- 1) were observed in the N treatment, while uptake of CH4 was observed in the DCD treatment. As flooded condition converted to 60% WFPS, CO2 emissions gradually increased in all experimental treatments, but the maximum cumulative CO2 emission was 477.44 mg kg- 1 in the DCD + N treatment. The maximum dissolved organic carbon (DOC) contents were observed in N and DCD + N treatments with the values of 57.12 and 58.92 mg kg- 1, respectively. Microbial biomass carbon (MBC) contents were higher at flooding while lower at transition phase, and increased at the initiation of 60% WFPS stage. However, MBC contents declined at the later stage of 60% WFPS. The maximum MBC contents were 202.12 and 192.41 mg kg- 1 in N and DCD + N treatments, respectively. Results demonstrated that water regimes exerted a dramatic impact on C and N dynamics, subsequently GHGs, which were highly controlled by DCD at both flooding and 60% WFPS conditions. |
资助项目 | National Natural Science Foundation of China[U20A20107] ; Regional Key STS Project of the Chinese Academy of Sciences[KFJ-STS-QYZD-2021-24-001] ; Chinese Academy of Sciences President's International Fellowship Initiative[2020PC0066] |
WOS关键词 | NITROUS-OXIDE EMISSIONS ; NITRIFICATION INHIBITOR ; MICROBIAL BIOMASS ; AGRICULTURAL LANDSCAPE ; DOLOMITE APPLICATION ; METHANE EMISSIONS ; ROTATION SYSTEMS ; ORGANIC-MATTER ; DCD ; FIELD |
WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
语种 | 英语 |
出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
WOS记录号 | WOS:000810182400005 |
资助机构 | National Natural Science Foundation of China ; Regional Key STS Project of the Chinese Academy of Sciences ; Chinese Academy of Sciences President's International Fellowship Initiative |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/56714] |
专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
通讯作者 | Zhou, Minghua |
作者单位 | 1.Huazhong Agr Univ, Coll Resources & Environm, Wuhan, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China |
推荐引用方式 GB/T 7714 | Shaaban, Muhammad,Khalid, Muhammad Salman,Hu, Ronggui,et al. Effects of water regimes on soil N2O, CH4 and CO2 emissions following addition of dicyandiamide and N fertilizer[J]. ENVIRONMENTAL RESEARCH,2022,212:8. |
APA | Shaaban, Muhammad,Khalid, Muhammad Salman,Hu, Ronggui,&Zhou, Minghua.(2022).Effects of water regimes on soil N2O, CH4 and CO2 emissions following addition of dicyandiamide and N fertilizer.ENVIRONMENTAL RESEARCH,212,8. |
MLA | Shaaban, Muhammad,et al."Effects of water regimes on soil N2O, CH4 and CO2 emissions following addition of dicyandiamide and N fertilizer".ENVIRONMENTAL RESEARCH 212(2022):8. |
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