IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2016  > Vol13 No.1
The impact of nitrogen amendment and crop growth on dissolved organic carbon in soil solution
Wang Xiao-guo1; Li Chang-sheng2; Luo Yong3; Hua Ke-ke4; Zhou Ming-hua5
Corresponding AuthorWANG Xiao-guo
AbstractDissolved organic carbon (DOC) is an important component of the terrestrial carbon cycle. However, the sources and controlling factors of DOC in soils remain uncertain. In this study, the effects of nitrogen (N) amendment and crop growth on DOC in soil solution were examined at a maize-wheat rotated field located in the central Sichuan Basin in southwestern China. Nitrogen treatments in this study included 150 kg N ha(-1) season(-1), 200 kg N ha(-1) season(-1) and the control without any fertilizer application. During the whole experimental period, we observed significant decreases (p < 0.05) in DOC concentrations in the sampled soil solutions associated with increase in N inputs at the bare soil plots, but no change in DOC at the plots with crop growth. The estimated average contributions of plantderived DOC were 16%, 24% and 32% of total DOC in the summer maize season and 21%, 32% and 38% in the winter wheat season along with the gradient of N fertilizer application rates. The results implied that the crop growth could play a key role in the soil DOC production, and the N input enhanced DOC production by increasing crop growth. The relationship between the DOC concentrations and the crop root biomass was statistically significant for both the maize and winter wheat seasons. Our observations indicated that crop growth exerted greater influence on the seasonal variability of DOC concentration in soil solutions at the experimental site, which overwhelmed the effect of soil native organic matter decomposition on DOC concentrations in soil solutions.
KeywordDissolved Organic Carbon Soil Solution n Fertilization
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000368175700008
Funding OrganizationNatural Science Foundation of China(41371302) ; Innovative Team Program of Chinese Academy of Sciences(KZZD-EW-TZ-o6) ; West Light Foundation of the Chinese Academy of Sciences
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.1
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm Res, Key Lab Mt Environm Evolut & Its Regulat, Chengdu 610041, Peoples R China
2.Univ New Hampshire, Inst Study Earth Ocean & Space, Durham, NH 03824 USA
3.Chengdu Univ Technol, Minist Land & Resources China, Key Lab Geosci Spatial Informat Technol, Chengdu 610059, Peoples R China
4.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, Hefei 230031, Peoples R China
5.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Environm Res IMK IFU, D-82467 Garmisch Partenkirchen, Germany
Recommended Citation
GB/T 7714
Wang Xiao-guo,Li Chang-sheng,Luo Yong,et al. The impact of nitrogen amendment and crop growth on dissolved organic carbon in soil solution[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(1):95-103.
APA Wang Xiao-guo,Li Chang-sheng,Luo Yong,Hua Ke-ke,&Zhou Ming-hua.(2016).The impact of nitrogen amendment and crop growth on dissolved organic carbon in soil solution.JOURNAL OF MOUNTAIN SCIENCE,13(1),95-103.
MLA Wang Xiao-guo,et al."The impact of nitrogen amendment and crop growth on dissolved organic carbon in soil solution".JOURNAL OF MOUNTAIN SCIENCE 13.1(2016):95-103.
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