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Spatiotemporal variations in soil CO2 fluxes under a winter wheat-summer maize cropping system in the North China Plain
Qiu, Qingyan1; Wu, Lanfang2; Li, Binbin2; Xu, Yanyan2
2020-02-28
Source PublicationNUTRIENT CYCLING IN AGROECOSYSTEMS
ISSN1385-1314
Pages17
Corresponding AuthorWu, Lanfang(wulf@igsnrr.ac.cn)
AbstractMost studies on soil CO2 fluxes focus on the upper soil layers (i.e., 0-200 mm); however, there is a lack of investigation into soil layers below 200 mm, even though about half of soil organic carbon (SOC) is stored at these depths. In order to investigate the responses of CO2 fluxes in subsurface soils to crop residue incorporation in the topsoil, a field experiment comprising two treatments (i.e., conventional tillage with and without crop residue incorporation) was carried out under a winter wheat-summer maize cropping system from 2014 to 2016 in the Yucheng Agricultural Station, Shandong Province, China. The results showed that soil CO2 fluxes had large spatiotemporal variabilities and were significantly affected by crop residue applications (P < 0.05). Soil CO2 fluxes increased with soil depth. The CO2 fluxes from 100 to 400 mm soil depths were 1.1-5.1 times higher than those from 0 to 100 mm soil depths. Incorporation of crop residues into the soil significantly increased soil CO2 fluxes in all sampled layers (P < 0.05), and the magnitude increased with increasing soil depth. Soil moisture and the ratio of soil dissolved organic carbon to nitrogen (DOC/DON) were the dominant factors regulating soil CO2 fluxes in the wheat growing season, whereas soil DON concentrations dominated in the maize growing season. Our study indicated that deep soil C was more vulnerable to the incorporation of crop residues than the C present in surface soil. Incorporation of crop residues into surface soil might not increase SOC sequestration in the subsurface soil.
KeywordCO2 fluxes Soil depth Crop residues Conventional tillage Labile organic substrates
DOI10.1007/s10705-020-10053-1
WOS KeywordORGANIC-CARBON FRACTIONS ; NITROUS-OXIDE EMISSIONS ; MICROBIAL COMMUNITY ; AUTOTROPHIC RESPIRATION ; ROTATION CROPLAND ; PLANT RESIDUES ; STRAW RETURN ; NO-TILL ; MATTER ; DEEP
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31271675] ; National Natural Science Foundation of China[41703066] ; Provincial Natural Sciences Foundation of Fujian[2018J05047] ; Provincial Natural Sciences Foundation of Fujian[JAT170188] ; Forestry Peak Discipline Construction Project ; Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Chinese Academy of Sciences[Y821161001-DE2018025]
Funding OrganizationNational Natural Science Foundation of China ; Provincial Natural Sciences Foundation of Fujian ; Forestry Peak Discipline Construction Project ; Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Chinese Academy of Sciences
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000517011000001
PublisherSPRINGER
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/132652
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWu, Lanfang
Affiliation1.Fujian Agr & Forestry Univ, Coll Forest, Forest Ecol Stable Isotope Ctr, Fuzhou 350002, Peoples R China
2.Chinese Acad Sci, Yucheng Comprehens Expt Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Qiu, Qingyan,Wu, Lanfang,Li, Binbin,et al. Spatiotemporal variations in soil CO2 fluxes under a winter wheat-summer maize cropping system in the North China Plain[J]. NUTRIENT CYCLING IN AGROECOSYSTEMS,2020:17.
APA Qiu, Qingyan,Wu, Lanfang,Li, Binbin,&Xu, Yanyan.(2020).Spatiotemporal variations in soil CO2 fluxes under a winter wheat-summer maize cropping system in the North China Plain.NUTRIENT CYCLING IN AGROECOSYSTEMS,17.
MLA Qiu, Qingyan,et al."Spatiotemporal variations in soil CO2 fluxes under a winter wheat-summer maize cropping system in the North China Plain".NUTRIENT CYCLING IN AGROECOSYSTEMS (2020):17.
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