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Soil recalcitrant but not labile organic nitrogen mineralization contributes to microbial nitrogen immobilization and plant nitrogen uptake.
Chen, Shending; Elrys, Ahmed S; Yang, Wenyan; Du, Siwen; He, Mengqiu; Cai, Zucong; Zhang, Jinbo; Müller, Christoph.
Afiliación
  • Chen S; School of Breeding and Multiplication, Hainan University, Sanya, China.
  • Elrys AS; School of Geography, Nanjing Normal University, Nanjing, China.
  • Yang W; Institute of Plant Ecology, Justus-Liebig University Giessen, Giessen, Germany.
  • Du S; School of Breeding and Multiplication, Hainan University, Sanya, China.
  • He M; College of Tropical Agriculture and Forestry, Hainan University, Haikou, China.
  • Cai Z; Soil Science Department, Faculty of Agriculture, Zagazig University, Zagazig, Egypt.
  • Zhang J; Liebig Centre for Agroecology and Climate Impact Research, Justus Liebig University, Giessen, Germany.
  • Müller C; School of Breeding and Multiplication, Hainan University, Sanya, China.
Glob Chang Biol ; 30(4): e17290, 2024 Apr.
Article en En | MEDLINE | ID: mdl-38651789
ABSTRACT
Soil organic nitrogen (N) mineralization not only supports ecosystem productivity but also weakens carbon and N accumulation in soils. Recalcitrant (mainly mineral-associated organic matter) and labile (mainly particulate organic matter) organic materials differ dramatically in nature. Yet, the patterns and drivers of recalcitrant (MNrec) and labile (MNlab) organic N mineralization rates and their consequences on ecosystem N retention are still unclear. By collecting MNrec (299 observations) and MNlab (299 observations) from 57 15N tracing studies, we found that soil pH and total N were the master factors controlling MNrec and MNlab, respectively. This was consistent with the significantly higher rates of MNrec in alkaline soils and of MNlab in natural ecosystems. Interestingly, our analysis revealed that MNrec directly stimulated microbial N immobilization and plant N uptake, while MNlab stimulated the soil gross autotrophic nitrification which discouraged ammonium immobilization and accelerated nitrate production. We also noted that MNrec was more efficient at lower precipitation and higher temperatures due to increased soil pH. In contrast, MNlab was more efficient at higher precipitation and lower temperatures due to increased soil total N. Overall, we suggest that increasing MNrec may lead to a conservative N cycle, improving the ecosystem services and functions, while increasing MNlab may stimulate the potential risk of soil N loss.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Microbiología del Suelo / Nitrógeno Idioma: En Revista: Glob Chang Biol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Microbiología del Suelo / Nitrógeno Idioma: En Revista: Glob Chang Biol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido