Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems
The demand for nitrogen (N) for crop production increased rapidly from the middle of the twentieth century and is predicted to at least double by 2050 to satisfy the on-going improvements in productivity of major food crops such as wheat, rice and maize that underpin the staple diet of most of the w...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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Elsevier
2022
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/126447 |
| _version_ | 1855533496174379008 |
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| author | Ladha, Jagdish K. Peoples, Mark B. Reddy, Pallavolu M. Biswas, Jatish C. Bennett, Alan Jat, Mangi Lal Krupnik, Timothy J. |
| author_browse | Bennett, Alan Biswas, Jatish C. Jat, Mangi Lal Krupnik, Timothy J. Ladha, Jagdish K. Peoples, Mark B. Reddy, Pallavolu M. |
| author_facet | Ladha, Jagdish K. Peoples, Mark B. Reddy, Pallavolu M. Biswas, Jatish C. Bennett, Alan Jat, Mangi Lal Krupnik, Timothy J. |
| author_sort | Ladha, Jagdish K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The demand for nitrogen (N) for crop production increased rapidly from the middle of the twentieth century and is predicted to at least double by 2050 to satisfy the on-going improvements in productivity of major food crops such as wheat, rice and maize that underpin the staple diet of most of the world's population. The increased demand will need to be fulfilled by the two main sources of N supply – biological nitrogen (gas) (N2) fixation (BNF) and fertilizer N supplied through the Haber-Bosch processes. BNF provides many functional benefits for agroecosystems. It is a vital mechanism for replenishing the reservoirs of soil organic N and improving the availability of soil N to support crop growth while also assisting in efforts to lower negative environmental externalities than fertilizer N. In cereal-based cropping systems, legumes in symbiosis with rhizobia contribute the largest BNF input; however, diazotrophs involved in non-symbiotic associations with plants or present as free-living N2-fixers are ubiquitous and also provide an additional source of fixed N. This review presents the current knowledge of BNF by free-living, non-symbiotic and symbiotic diazotrophs in the global N cycle, examines global and regional estimates of contributions of BNF, and discusses possible strategies to enhance BNF for the prospective benefit of cereal N nutrition. We conclude by considering the challenges of introducing in planta BNF into cereals and reflect on the potential for BNF in both conventional and alternative crop management systems to encourage the ecological intensification of cereal and legume production. |
| format | Journal Article |
| id | CGSpace126447 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1264472025-11-12T04:58:43Z Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems Ladha, Jagdish K. Peoples, Mark B. Reddy, Pallavolu M. Biswas, Jatish C. Bennett, Alan Jat, Mangi Lal Krupnik, Timothy J. cereals crop production fertilizer application growth rate legumes nitrogen cycle nitrogen fixation nitrogen fixing bacteria The demand for nitrogen (N) for crop production increased rapidly from the middle of the twentieth century and is predicted to at least double by 2050 to satisfy the on-going improvements in productivity of major food crops such as wheat, rice and maize that underpin the staple diet of most of the world's population. The increased demand will need to be fulfilled by the two main sources of N supply – biological nitrogen (gas) (N2) fixation (BNF) and fertilizer N supplied through the Haber-Bosch processes. BNF provides many functional benefits for agroecosystems. It is a vital mechanism for replenishing the reservoirs of soil organic N and improving the availability of soil N to support crop growth while also assisting in efforts to lower negative environmental externalities than fertilizer N. In cereal-based cropping systems, legumes in symbiosis with rhizobia contribute the largest BNF input; however, diazotrophs involved in non-symbiotic associations with plants or present as free-living N2-fixers are ubiquitous and also provide an additional source of fixed N. This review presents the current knowledge of BNF by free-living, non-symbiotic and symbiotic diazotrophs in the global N cycle, examines global and regional estimates of contributions of BNF, and discusses possible strategies to enhance BNF for the prospective benefit of cereal N nutrition. We conclude by considering the challenges of introducing in planta BNF into cereals and reflect on the potential for BNF in both conventional and alternative crop management systems to encourage the ecological intensification of cereal and legume production. 2022-07 2023-01-01T16:18:22Z 2023-01-01T16:18:22Z Journal Article https://hdl.handle.net/10568/126447 en Open Access application/pdf Elsevier Ladha, J. K., Peoples, M. B., Reddy, P. M., Biswas, J. C., Bennett, A., Jat, M. L., & Krupnik, T. J. (2022). Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems. Field Crops Research, 283, 108541. https://doi.org/10.1016/j.fcr.2022.108541 |
| spellingShingle | cereals crop production fertilizer application growth rate legumes nitrogen cycle nitrogen fixation nitrogen fixing bacteria Ladha, Jagdish K. Peoples, Mark B. Reddy, Pallavolu M. Biswas, Jatish C. Bennett, Alan Jat, Mangi Lal Krupnik, Timothy J. Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems |
| title | Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems |
| title_full | Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems |
| title_fullStr | Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems |
| title_full_unstemmed | Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems |
| title_short | Biological nitrogen fixation and prospects for ecological intensification in cereal-based cropping systems |
| title_sort | biological nitrogen fixation and prospects for ecological intensification in cereal based cropping systems |
| topic | cereals crop production fertilizer application growth rate legumes nitrogen cycle nitrogen fixation nitrogen fixing bacteria |
| url | https://hdl.handle.net/10568/126447 |
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