Mapping soil nitrogen fractionation
Adl, Sina1; Liu, Min2,3; Xu, Xingliang2,4
Source PublicationRHIZOSPHERE
Corresponding AuthorAdl, Sina(sina.adl@usask.ca)
AbstractIn most terrestrial ecosystems, nitrogen (N) is an essential and often limiting element for living organisms. There is competition for the available N between roots, rhizosphere organisms and the overall soil food web. N derived from biological fixation in the soil reaches the above ground terrestrial food web through two pathways: from root uptake, and by successive predation on soil organisms. Considering the importance of N in terrestrial ecosystems, investigations of food web interactions for N through the food web in time and space are a prerequisite for better understanding of primary production and nutrient cycling. Here we reviewed N partitioning in the soil based on stable isotope (N-15 and C-13) ratio mass spectrometry studies of the food webs. Bacteria stratification in peds and down the soil profile, as represented by Pourbaix diagrams, delineate metabolic functions and N fixation parameters. We proposed a model for the path of N through the soil to the above ground sub-system. There are two main paths: one from root nutrient uptake to the aerial parts of the plant, and the other through the soil food web from successive consumption by predation of soil organisms, to the above-ground terrestrial food web. There are insufficient data available on the bacteria-bacterivore feeding pathway, but it would appear that besides specialized bacterivorous protists, other protists and nematodes tend to be more generalized microbivores. Understanding the pathway of N transfer better, and its regulating parameters for functional guilds within trophic levels, has implications for the sustainable management of our environment, agriculture sustainability, forest soil management, and remediation of disturbed environments.
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[41877089] ; NSERC
Funding OrganizationNational Natural Science Foundation of China ; NSERC
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000595929700003
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Document Type期刊论文
Corresponding AuthorAdl, Sina
Affiliation1.Univ Saskatchewan, Coll Agr & Bioresources, Dept Soil Sci, 51 Campus Dr, Saskatoon, SK S7N5A8, Canada
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Adl, Sina,Liu, Min,Xu, Xingliang. Mapping soil nitrogen fractionation[J]. RHIZOSPHERE,2020,16:6.
APA Adl, Sina,Liu, Min,&Xu, Xingliang.(2020).Mapping soil nitrogen fractionation.RHIZOSPHERE,16,6.
MLA Adl, Sina,et al."Mapping soil nitrogen fractionation".RHIZOSPHERE 16(2020):6.
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