IMHE OpenIR  > 山地表生过程与生态调控重点实验室
The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem
Zhang, Jinbo1,2,3; Tian, Peng4; Tang, Jialiang5; Yuan, Lei1; Ke, Yun5; Cai, Zucong1,6; Zhu, Bo5; Mueller, Christoph7
Corresponding AuthorCai, Zucong ; Zhu, Bo
2016
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
EISSN2169-8961
Volume121Issue:6Pages:1409-1419
SubtypeArticle
AbstractIt is important to clarify the quantity and composition of hydrologic N export from terrestrial ecosystem and its primary controlling factors, because it affected N availability, productivity, and C storage in natural ecosystems. The most previous investigations were focused on the effects of N deposition and human disturbance on the composition of hydrologic N export. However, few studies were aware of whether there were significant differences in the concentrations and composition of hydrologic N export from natural ecosystems in different climate zones and what is the primary controlling factor. In the present study, three natural forest ecosystems and one natural grassland ecosystem that were located in different climate zones and with different soil pH range were selected. The concentrations of total dissolved N, dissolved organic nitrogen (DON), NH4+, NO3- in soil solution and stream water, soil properties, and soil gross N transformation rates were measured to answer above questions. Our results showed that NO3- concentrations and the composition pattern of hydrologic N export from natural ecosystems varied greatly in the different climate zones. The NO3- concentrations in stream water varied largely, ranging from 0.1mgNL(-1) to 1.6mgNL(-1), while DON concentration in stream water, ranging from 0.1 to 0.9mgNL(-1), did not differ significantly, and the concentrations of NH4+ were uniformly low (average 0.1mgNL(-1)) in all studied sites. There was a trade-off relationship between the proportions of NO3- and DON to total dissolved N in stream water. In subtropical strongly acidic forests soil site, DON was the dominance in total dissolved N in stream water, while NO3--N became dominance in temperate acidic forests soil site, subtropical alkaline forests soil region, and the alpine meadow sites on the Tibetan Plateau. The proportions of NO3- to total dissolved N in both soil solution and stream water significantly increased with the increasing of the gross autotrophic nitrification rates (p<0.01). Our results indicated that the characteristics of soil N transformations were the most primary factor regulating the composition of hydrologic N losses from ecosystems. The nitrification was the central soil N transformation processes regulating N composition in soil solution and hydrologic N losses. These results provided important information on understanding easily the composition of hydrologic N export from terrestrial ecosystem.
KeywordDon Hydrologic n Export n Composition No3- Soil Gross n Transformations
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1002/2016JG003398
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Geology
Indexed BySCI
WOS KeywordDISSOLVED ORGANIC NITROGEN ; INORGANIC NITROGEN ; ISOTOPIC COMPOSITION ; TEMPERATE FORESTS ; NORTHEASTERN USA ; TROPICAL FOREST ; PLANT NITROGEN ; WATERSHEDS ; RETENTION ; NITRATE
Language英语
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000379965000001
Funding OrganizationNational Natural Science Foundation of China(41330744) ; "973" project(2015CB954201) ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)(164320H116)
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17551
Collection山地表生过程与生态调控重点实验室
Affiliation1.Nanjing Normal Univ, Sch Geog Sci, Nanjing, Jiangsu, Peoples R China
2.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China
3.State Key Lab Cultivat Base Geog Environm Evolut, Nanjing, Jiangsu, Peoples R China
4.Northeast Forestry Univ, Coll Forestry, Harbin, Peoples R China
5.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
6.Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing, Jiangsu, Peoples R China
7.Univ Giessen, Dept Plant Ecol IFZ, Giessen, Germany
Recommended Citation
GB/T 7714
Zhang, Jinbo,Tian, Peng,Tang, Jialiang,et al. The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2016,121(6):1409-1419.
APA Zhang, Jinbo.,Tian, Peng.,Tang, Jialiang.,Yuan, Lei.,Ke, Yun.,...&Mueller, Christoph.(2016).The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,121(6),1409-1419.
MLA Zhang, Jinbo,et al."The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 121.6(2016):1409-1419.
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