Effects of straw and biochar amendment on hydrological fluxes of dissolved organic carbon in a subtropical montane agricultural landscape*
文献类型:期刊论文
作者 | Jiang, Nan2,3; Bah, Hamidou1,2,3; Zhou, Minghua3; Xu, Peng3; Zhang, Bowen2,3; Zhu, Bo3 |
刊名 | ENVIRONMENTAL POLLUTION |
出版日期 | 2022-03-01 |
卷号 | 296页码:10 |
ISSN号 | 0269-7491 |
关键词 | Dissolved organic carbon Straw Biochar Hydrological pathway Subtropical montane agricultural landscape |
DOI | 10.1016/j.envpol.2021.118751 |
英文摘要 | Straw and biochar amendments have been shown to increase soil organic carbon (SOC) stocks in arable land; however, their effects on hydrological fluxes of dissolved organic carbon (DOC), which may offset the benefits of C sequestration amounts remain uncertain. Therefore, we conducted a three-year field study that included four treatments (CK, control with no fertilizer; NPK, synthetic N fertilizer; RSDNPK, synthetic N fertilizer plus crop residues; BCNPK, synthetic N fertilizer plus biochar of crop straw) to investigate the effects of straw and biochar amendment on DOC losses through hydrological pathways of overland flow and interflow from a wheat-maize rotation system in the subtropical montane agricultural landscape. We detected substantial intra- and interannual variations in runoff discharge, DOC concentration, and DOC fluxes for both overland flow and interflow pathways, which were primarily attributed to variations in rainfall amount and intensity. On average, the DOC concentrations for interflow (2.98 mg C L-1) were comparable with those for overland flow (2.71 mg C L-1) throughout the three-year experiment. However, average annual DOC fluxes for interflow were approximately 2.60 times greater than those for overland flow, which probably related to higher runoff discharges of interflow than overland flow. Compared to the control, on average, the N fertilization treatments significantly decreased the annual DOC fluxes of overland flow and significantly increased annual DOC fluxes of interflow. Relative to the application of synthetic N fertilizer only, on average, crop straw amendment practice significantly increased annual DOC fluxes of interflow by 28.7%, while decreasing annual DOC fluxes of overland flow by 12.0%; in contrast, biochar amendment practice decreased annual DOC fluxes of interflow by 25.3% while increasing annual DOC fluxes of overland flow by 44.6%. Overall, considering both overland flow and interflow, crop straw amendment significantly increased hydrological DOC fluxes, whereas biochar had no significant effects on hydrological DOC fluxes throughout the three-year experiment. We conclude that crop straw incorporation strategies that aim to increase SOC stocks may enhance hydrological losses of DOC, thereby in turn offsetting its benefits in the subtropical montane agricultural landscapes. |
WOS关键词 | SANDY LOAM SOIL ; LOESS PLATEAU ; NITROGEN DEPOSITION ; LATERAL TRANSPORT ; PURPLE SOIL ; MATTER ; FIELD ; MANAGEMENT ; DOC ; DYNAMICS |
资助项目 | National Key Research and Devel-opment Program[2019YFD1100503] ; National Natural Science Foundation of China[U20A20107] |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | ELSEVIER SCI LTD |
WOS记录号 | WOS:000760276100003 |
资助机构 | National Key Research and Devel-opment Program ; National Natural Science Foundation of China |
源URL | [http://ir.imde.ac.cn/handle/131551/56482] |
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 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
通讯作者 | Zhou, Minghua |
作者单位 | 1.Inst Super Agron & Vet Faranah ISAV F, Faranah 131, Guinea 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.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 | Jiang, Nan,Bah, Hamidou,Zhou, Minghua,et al. Effects of straw and biochar amendment on hydrological fluxes of dissolved organic carbon in a subtropical montane agricultural landscape*[J]. ENVIRONMENTAL POLLUTION,2022,296:10. |
APA | Jiang, Nan,Bah, Hamidou,Zhou, Minghua,Xu, Peng,Zhang, Bowen,&Zhu, Bo.(2022).Effects of straw and biochar amendment on hydrological fluxes of dissolved organic carbon in a subtropical montane agricultural landscape*.ENVIRONMENTAL POLLUTION,296,10. |
MLA | Jiang, Nan,et al."Effects of straw and biochar amendment on hydrological fluxes of dissolved organic carbon in a subtropical montane agricultural landscape*".ENVIRONMENTAL POLLUTION 296(2022):10. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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