Plant-mediated methane and nitrous oxide fluxes from a carex meadow in Poyang Lake during drawdown periods
Hu, QW; Cai, JY; Yao, B; Wu, Q; Wang, YQ; Xu, XL
2016
Source PublicationPLANT AND SOIL
ISSN0032-079X
Volume400Issue:01-02Pages:367-380
AbstractPlants have been suggested to have significant effects on methane (CH4) and nitrous oxide (N2O) fluxes from littoral wetlands, but it remains unclear in subtropical lakes. We conducted in situ measurement of CH4 and N2O fluxes for two years. To distinguish between the effects of shoots and roots, three treatments (i.e., intact plants as control, shoot clipping, and root exclusion) were used. Effects of plant biomass, temperature, and soil moisture on CH4 and N2O fluxes were analyzed. The mean ecosystem CH4 emission rate was 36 mu g CH4 m(-2) h(-1) for drying periods, but 8219 mu g CH4 m(-2) h(-1) for drying-wetting transition periods. CH4 fluxes were positively correlated with below-ground and total biomass, but not with above-ground biomass. Clipping did not significantly alter CH4 flux rate, but root exclusion decreased the CH4 flux by 116 % as compared to the control. N2O emissions were similar for both the drying and drying-wetting transition periods, with a mean rate of 20 mu g N2O m(-2) h(-1). Both clipping and root exclusion significantly increased N2O fluxes as compared to the control. There was no significant correlation between CH4 and N2O fluxes. Roots dominated plant-mediated enhancement in CH4 fluxes, but played almost an equal role as shoots in plant-regulated suppression on N2O fluxes in this Carex meadow during drawdown periods.
SubtypeJournal
KeywordPoyang Lake Carex meadow CH4 N2O Subtropical
Subject AreaAgriculture ; Plant Sciences
WOS Subject ExtendedAgronomy ; Plant Sciences ; Soil Science
WOS KeywordGREENHOUSE-GAS PRODUCTION ; LITTORAL-ZONE ; TERRESTRIAL ECOSYSTEMS ; CONSTRUCTED WETLANDS ; EMERGENT MACROPHYTES ; SOIL RESPIRATION ; ROOT RESPIRATION ; EUTROPHIC LAKE ; N2O EMISSIONS ; CO2 EFFLUX
Indexed BySCI
Language英语
WOS IDWOS:000371276000027
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44267
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Hu, QW,Cai, JY,Yao, B,et al. Plant-mediated methane and nitrous oxide fluxes from a carex meadow in Poyang Lake during drawdown periods[J]. PLANT AND SOIL,2016,400(01-02):367-380.
APA Hu, QW,Cai, JY,Yao, B,Wu, Q,Wang, YQ,&Xu, XL.(2016).Plant-mediated methane and nitrous oxide fluxes from a carex meadow in Poyang Lake during drawdown periods.PLANT AND SOIL,400(01-02),367-380.
MLA Hu, QW,et al."Plant-mediated methane and nitrous oxide fluxes from a carex meadow in Poyang Lake during drawdown periods".PLANT AND SOIL 400.01-02(2016):367-380.
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