Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola
Brachiaria humidicola (syn. Urochloa humidicola) has been acknowledged to control soil nitrification through release of nitrification inhibitors (NI), a phenomenon conceptualized as biological nitrification inhibition (BNI). Liming and N fertilization as features of agricultural intensification may...
| Autores principales: | , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/116148 |
| _version_ | 1855542210762637312 |
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| author | Egenolf, Konrad Schad, Philipp Arévalo, Ashly Villegas, Daniel Mauricio Arango, Jacobo Karwat, Hannes Cadisch, Georg Rasche, Frank |
| author_browse | Arango, Jacobo Arévalo, Ashly Cadisch, Georg Egenolf, Konrad Karwat, Hannes Rasche, Frank Schad, Philipp Villegas, Daniel Mauricio |
| author_facet | Egenolf, Konrad Schad, Philipp Arévalo, Ashly Villegas, Daniel Mauricio Arango, Jacobo Karwat, Hannes Cadisch, Georg Rasche, Frank |
| author_sort | Egenolf, Konrad |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Brachiaria humidicola (syn. Urochloa humidicola) has been acknowledged to control soil nitrification through release of nitrification inhibitors (NI), a phenomenon conceptualized as biological nitrification inhibition (BNI). Liming and N fertilization as features of agricultural intensification may suppress BNI performance, due to a decrease in NI exudation, increased NH3 availability and promotion of ammonia oxidizing bacteria (AOB) over archaea (AOA). A 2-year three-factorial pot trial was conducted to investigate the influence of soil pH and soil microbial background (ratio of archaea to bacteria) on BNI performance of B. humidicola. The study verified the capacity of B. humidicola to reduce net nitrification rates by 50 to 85% compared to the non-planted control, irrespective of soil pH and microbial background. The reduction of net nitrification, however, was largely dependent on microbial N immobilization and efficient plant N uptake. A reduction of gross nitrification could not be confirmed for the AOA dominated soil, but possibly contributed to reduced net nitrification rates in the AOB-dominated soil. However, this putative reduction of gross nitrification was attributed to plant-facilitated inter-microbial competition between bacterial heterotrophs and nitrifiers rather than BNI. It was concluded that BNI may play a dominant role in extensive B. humidicola pasture systems, while N immobilization and efficient plant N uptake may display the dominant factors controlling net nitrification rates under intensively managed B. humidicola. |
| format | Journal Article |
| id | CGSpace116148 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1161482025-11-11T19:08:47Z Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola Egenolf, Konrad Schad, Philipp Arévalo, Ashly Villegas, Daniel Mauricio Arango, Jacobo Karwat, Hannes Cadisch, Georg Rasche, Frank nitrification nitrification inhibitors immobilization nitrogen nitrogen fixation soil analysis nitrificación inhibidores de la nitrificación inmovilización nitrógeno fijación del nitrógeno análisis del suelo brachiaria humidicola Brachiaria humidicola (syn. Urochloa humidicola) has been acknowledged to control soil nitrification through release of nitrification inhibitors (NI), a phenomenon conceptualized as biological nitrification inhibition (BNI). Liming and N fertilization as features of agricultural intensification may suppress BNI performance, due to a decrease in NI exudation, increased NH3 availability and promotion of ammonia oxidizing bacteria (AOB) over archaea (AOA). A 2-year three-factorial pot trial was conducted to investigate the influence of soil pH and soil microbial background (ratio of archaea to bacteria) on BNI performance of B. humidicola. The study verified the capacity of B. humidicola to reduce net nitrification rates by 50 to 85% compared to the non-planted control, irrespective of soil pH and microbial background. The reduction of net nitrification, however, was largely dependent on microbial N immobilization and efficient plant N uptake. A reduction of gross nitrification could not be confirmed for the AOA dominated soil, but possibly contributed to reduced net nitrification rates in the AOB-dominated soil. However, this putative reduction of gross nitrification was attributed to plant-facilitated inter-microbial competition between bacterial heterotrophs and nitrifiers rather than BNI. It was concluded that BNI may play a dominant role in extensive B. humidicola pasture systems, while N immobilization and efficient plant N uptake may display the dominant factors controlling net nitrification rates under intensively managed B. humidicola. 2022-04 2021-11-18T13:58:23Z 2021-11-18T13:58:23Z Journal Article https://hdl.handle.net/10568/116148 en Open Access application/pdf Springer Egenolf, K.; Schad, P.; Arévalo, A.; Villegas, D.; Arango, J.; Karwat, H.; Cadisch, G.; Rasche, F. (2021) Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola. Biology and Fertility of Soils, Online first paper (13 November 2021) ISSN: 0178-2762 |
| spellingShingle | nitrification nitrification inhibitors immobilization nitrogen nitrogen fixation soil analysis nitrificación inhibidores de la nitrificación inmovilización nitrógeno fijación del nitrógeno análisis del suelo brachiaria humidicola Egenolf, Konrad Schad, Philipp Arévalo, Ashly Villegas, Daniel Mauricio Arango, Jacobo Karwat, Hannes Cadisch, Georg Rasche, Frank Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola |
| title | Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola |
| title_full | Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola |
| title_fullStr | Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola |
| title_full_unstemmed | Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola |
| title_short | Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola |
| title_sort | inter microbial competition for n and plant no3 uptake rather than bni determines soil net nitrification under intensively managed brachiaria humidicola |
| topic | nitrification nitrification inhibitors immobilization nitrogen nitrogen fixation soil analysis nitrificación inhibidores de la nitrificación inmovilización nitrógeno fijación del nitrógeno análisis del suelo brachiaria humidicola |
| url | https://hdl.handle.net/10568/116148 |
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