| Autor: |
Adrián Bozal-Leorri, Mario Corrochano-Monsalve, Luis M. Arregui, Pedro M. Aparicio-Tejo, Carmen González-Murua |
| Přispěvatelé: |
Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. ISFOOD - Institute for Innovation and Sustainable Development in Food Chain, Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. IMAB - Institute for Multidisciplinary Research in Applied Biology |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Popis: |
Agriculture has increased the release of reactive nitrogen to the environment due to crops' low nitrogen-use efficiency (NUE) after the application of nitrogen-fertilisers. Practices like the use of stabilized-fertilisers with nitrification inhibitors such as DMPP (3,4-dimethylpyrazole phosphate) have been adopted to reduce nitrogen losses. Otherwise, cover crops can be used in crop-rotation-strategies to reduce soil nitrogen pollution and benefit the following culture. Sorghum (Sorghum bicolor) could be a good candidate as it is drought tolerant and its culture can reduce nitrogen losses derived from nitrification because it exudates biological nitrification inhibitors (BNIs). This work aimed to evaluate the effect of fallow-wheat and sorghum cover crop-wheat rotations on N2O emissions and the grain yield of winter wheat crop. In addition, the suitability of DMPP addition was also analyzed. The use of sorghum as a cover crop might not be a suitable option to mitigate nitrogen losses in the subsequent crop. Although sorghum–wheat rotation was able to reduce 22% the abundance of amoA, it presented an increment of 77% in cumulative N2O emissions compared to fallow–wheat rotation, which was probably related to a greater abundance of heterotrophic-denitrification genes. On the other hand, the application of DMPP avoided the growth of ammonia-oxidizing bacteria and maintained the N2O emissions at the levels of unfertilized-soils in both rotations. As a conclusion, the use of DMPP would be recommendable regardless of the rotation since it maintains NH4+ in the soil for longer and mitigates the impact of the crop residues on nitrogen soil dynamics. This work was supported by the Spanish Government (RTI2018-094623-B-C21 and C22 MCIU/AEI/FEDER, UE) and the Basque Government (IT-932-16). Dr. Adrián Bozal-Leorri held a grant from the Basque Government (PRE-2020-2-0142). Dr. Mario Corrochano-Monsalve held a grant from the Ministry of Economy and Business of the Spanish Government (BES-2016-076725). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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