E3S Web Conf.
Volume 98, 201916th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference)
|Number of page(s)||5|
|Section||Applied Isotope Geochemistry|
|Published online||07 June 2019|
Chemical and isotopic characterization of nitrate retained and leached from soil after manure fertilization-by lysimeter experiments
Grup de Mineralogia Aplicada, Geoquímica i Geomicrobiologia, Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra, Universitat de Barcelona (UB), Martí i Franquès s/n, 08020, Barcelona, Spain
2 Serra Húnter Fellowship, Generalitat de Catalunya, Spain
3 CREAF, Cerdanyola del Vallès 08193, Spain
4 Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193, Spain
5 Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), San José, Costa Rica
* Corresponding author: firstname.lastname@example.org
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 (δ15N-NO3- and δ18O-NO3-) was studied coupled with the evolution of N-compounds retained and leached from the soil. Results showed an increase in the δ15N-NO3- of the leached nitrate towards values similar to the δ15N-NH4+ from the applied manure. The highest δ15N-NO3- values were measured after 100 days of manure application, and thereafter, values decreased progressively towards the initial δ15N-NO3- of the soil before manure application.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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