Chemical and isotopic characterization of nitrate retained and leached from soil after manure fertilization-by lysimeter experiments
Increase of soil fertilization produces an increase of N exported to the hydrosphere. The amount of nitrate that reaches the aquifers is controlled by processes affecting N-species within the soils. The most relevant processes are nitrification, denitrification, assimilation, mineralization, and imm...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/447081 |
| Acceso en línea: | https://hdl.handle.net/2117/447081 https://dx.doi.org/10.1051/e3sconf/20199812016 |
| Access Level: | acceso abierto |
| Palabra clave: | Àrees temàtiques de la UPC::Enginyeria agroalimentària::Ciències de la terra i de la vida::Edafologia Àrees temàtiques de la UPC::Enginyeria agroalimentària::Agricultura::Fertilització |
| Sumario: | Increase of soil fertilization produces an increase of N exported to the hydrosphere. The amount of nitrate that reaches the aquifers is controlled by processes affecting N-species within the soils. The most relevant processes are nitrification, denitrification, assimilation, mineralization, and immobilization. This work studies the fate of N compounds in soil after manure application in a lysimeter study. To this end the isotopic composition of N and O of dissolved nitrate (d15N-NO3- and d18O-NO3-) was studied coupled with the evolution of N-compounds retained and leached from the soil. Results showed an increase in the d15N-NO3- of the leached nitrate towards values similar to the d15N-NH4+ from the applied manure. The highest d15N-NO3- values were measured after 100 days of manure application, and thereafter, values decreased progressively towards the initial d15N-NO3- of the soil before manure application. |
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