首页|Soil clay minerals: An overlooked mediator of gross N transformations in Regosolic soils of subtropical montane landscapes
Soil clay minerals: An overlooked mediator of gross N transformations in Regosolic soils of subtropical montane landscapes
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NSTL
Elsevier
? 2022 Elsevier LtdSoil physiochemical and biological properties have been demonstrated as key controllers of nitrogen (N) transformation in soil; however, the roles of different soil properties in regulating the transformation processes and rates of N remain largely uncertain. Therefore, we quantified the gross transformation rate of N in soil and examined its relationships with N transformation-related functional gene abundances, clay minerals, and soil physiochemical properties across seven Regosolic soils within a subtropical montane agricultural landscape using the 15N tracing approach. We detected substantial variations in gross N mineralization, nitrification, and immobilization rates of NH4+ and NO3? across these Regosolic soils; however, across all soils, the immobilization rate of NH4+ was relatively high to NO3? and the soil's capacity to retain NO3? remained very low. The substantial variation in the gross N transformation in soil was primarily attributed to the influences of microbial functional genes (e.g., bacteria amoA for autotrophic nitrification) and soil properties (e.g., soil pH and sand content for organic N mineralization rates). Moreover, the clay mineral content and soil type regulated rates of gross N transformation processes, including autotrophic nitrification, mineralization, and NH4+ immobilization of Regosolic soils in subtropical montane landscapes. These findings suggest that clay minerals should no longer be overlooked as mediators of gross N transformations in soil.
Gross nitrogen transformationsMineral-microbe interactionRegosolic soilSoil clay mineral
Zhang B.、Zhou M.、Zhu B.、Xiao Q.、Zheng X.、Zhang J.、Butterbach-Bahl K.、Muller C.
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Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences
School of Geography Sciences Nanjing Normal University
Institute for Meteorology and Climate Research Atmospheric Environmental Research Karlsruhe Institute of Technology
Institute of Plant Ecology (IFZ) Justus Liebig University Giessen
NSTL
Elsevier
