Journal ArticleDOI
Nitrogen mineralization: challenges of a changing paradigm
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TLDR
A complete new conceptual model of the soil N cycle needs to incorporate recent research on plant–microbe competition and microsite processes to explain the dynamics of N across the wide range of N availability found in terrestrial ecosystems.Abstract:
Until recently, the common view of the terrestrial nitrogen cycle had been driven by two core assumptions—plants use only inorganic N and they compete poorly against soil microbes for N. Thus, plants were thought to use N that microbes “left over,” allowing the N cycle to be divided cleanly into two pieces—the microbial decomposition side and the plant uptake and use side. These were linked by the process of net mineralization. Over the last decade, research has changed these views. N cycling is now seen as being driven by the depolymerization of N-containing polymers by microbial (including mycorrhizal) extracellular enzymes. This releases organic N-containing monomers that may be used by either plants or microbes. However, a complete new conceptual model of the soil N cycle needs to incorporate recent research on plant–microbe competition and microsite processes to explain the dynamics of N across the wide range of N availability found in terrestrial ecosystems. We discuss the evolution of thinking abou...read more
Citations
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Journal ArticleDOI
Global patterns of soil gross immobilization of ammonium and nitrate in terrestrial ecosystems
Ahmed S. Elrys,Zhaoxiong Chen,Jing Wang,Yves Uwiragiye,Ayman M. Helmy,El-Sayed M. Desoky,Yi Cheng,Jinbo Zhang,Zucong Cai,Christoph Müller +9 more
TL;DR: In this article , the authors provide a comprehensive analysis considering gross N production rates, soil properties, and climate and their interactions for a deeper understanding of the patterns and drivers of INH4 and INO3.
Journal ArticleDOI
Challenging the paradigm of nitrogen cycling: no evidence of in situ resource partitioning by coexisting plant species in grasslands of contrasting fertility
Anna V. Wilkinson,Anna V. Wilkinson,Paul W. Hill,Marie Victoria Vaieretti,John Farrar,Davey L. Jones,Richard D. Bardgett,Richard D. Bardgett +7 more
TL;DR: The hypothesis that differences in the availability of inorganic and organic N facilitate resource partitioning in grassland is not supported, but the emerging view that peptides represent a significant, but until now neglected, component of the terrestrial N cycle is supported.
Journal ArticleDOI
Ammonia-oxidizing archaea respond positively to inorganic nitrogen addition in desert soils
TL;DR: Unique traits of ammonia oxidizers in arid lands, which should be considered globally in predictions of AO responses to changes in N availability, are highlighted.
Journal ArticleDOI
Forest soil carbon and nitrogen cycles under biomass harvest: Stability, transient response, and feedback
TL;DR: In this article, the impact of biomass harvest and N fertilization on soil biogeochemistry and ecosystem yield with an ecosystem model of intermediate complexity that couples plant and soil C and N cycles.
Journal ArticleDOI
Spatial heterogeneity of microbial community and enzyme activities in a broad-leaved Korean pine mixed forest
Fan Yang,Jing Tian,Huajun Fang,Yang Gao,Xinyu Zhang,Guirui Yu,Yakov Kuzyakov,Yakov Kuzyakov,Yakov Kuzyakov +8 more
TL;DR: Close spatial connections between microbial communities, enzyme activities, and root biomass and soil variables help to understand the main drivers of belowground soil biodiversity in the forest.
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