Fecha/hora: 13/06/2024 07:51:30

Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 30/10/2018
Fecha de la última actualización: | 10/10/2019
Autoria: | CIGANDA, V.; LÓPEZ-AIZPÚN, M.; REPULLO, M.A.; WU, D.; TERRA, J.A.; ELUSTONDO, D.; CLOUGH, T.; CARDENAS, L.M.
Afiliación: | VERONICA SOLANGE CIGANDA BRASCA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARÍA LÓPEZ-AIZPÚN, LICA, Department of Chemistry, University of Navarre, Spain.; MIGUEL A REPULLO, Institute of Agricultural Research and Training (IFAPA), Spain.; DI WU, Institute of Bio-Geosciences, Agrosphere (IBG-3), Germany.; JOSÉ ALFREDO TERRA FERNÁNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DAVID ELUSTONDO, LICA, Department of Chemistry, University of Navarre, Spain.; TIM CLOUGH, Faculty of Agriculture and Life Sciences, New Zealand.; LAURA M. CARDENAS, Rothamsted Research, UK.
Título: | Soil nitrous oxide emissions from grassland: potential inhibitor effect of hippuric acid.
Año de publicación: | 2018
Fuente/Imprenta: | Journal of Plant Nutrition ans Soil Science, 2018.
DOI: | 10.1002/jpln.201700393
Idioma: | Inglés
Notas: | Article history: Accepted 01 October 2018.

Contenido:

Abstract:
In grassland systems, cattle and sheep urine patches are recognized as nitrous oxide (N2O) emission hot spots due to the high urinary nitrogen (N) concentrations. Hippuric acid (HA) is one of the constituents of ruminant urine that has been reported as a natural inhibitor of soil N2O emissions. The aim of this study was to examine the potential for elevated ruminant urine HA concentrations to reduce N2O emissions, in situ, on an acidic heavy clay soil under poorly drained conditions (WFPS > 85%). A randomized complete block design experiment with three replications and four treatments was conducted using the closed-static-flux chamber methodology.
The four treatments were applied inside the chambers: control with no artificial urine application (C), control artificial urine (U), and enriched artificial urine with two rates of HA (55.8 and 90 mM, U+HA1, U+HA2). Soil inorganic-N, soil dissolved organic carbon (DOC), soil pH as well as N2O and methane (CH4) fluxes were monitored over a 79-d period. Although N2O emissions were not affected by the HA enriched urine treatments, U+HA2 positively affected the retention of N as NHþ4 until day 3, when the soil pH dropped to values < 5. Subsequently, as a consequence of rainfall events and soil acidification, it is likely that leaching or sorption onto clay
reduced the efficacy of HA, masking any treatment differential effect on N2O emissions. Moreover, CH4 fluxes as well as DOC results reflected the soil anaerobic conditions which did not favour nitrification processes. Further research is needed to determine the fate of HA into the soil which might clarify the lack of an in situ effect of this compound.

Palabras-Clave: | BOVINE URINE; HEAVY CLAY SOIL; N2O EMISSIONS; NATURAL NITRIFICATION INHIBITION.
Thesagro: | BOVINOS; GASES DE EFECTO INVERNADERO; ORINA; OXIDO NITROSO.
Categoría del tema: | P01 Conservación de la naturaleza y recursos de La tierra
Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (102638-1) - PXI - AP - DD - PP/JPNSS-2018 -  -  - DIS