Management of irrigation frequency and nitrogen fertilization to mitigate GHG and NO emissions from drip-fertigated crops

Ábalos Rodríguez, Diego; Sánchez Martín, Laura; García Torres, Lourdes; Van Groenigen, Jan Willem y Vallejo Garcia, Antonio (2014). Management of irrigation frequency and nitrogen fertilization to mitigate GHG and NO emissions from drip-fertigated crops. "Science of the Total Environment", v. 490 ; pp. 880-888. ISSN 0048-9697. https://doi.org/10.1016/j.scitotenv.2014.05.065.

Descripción

Título: Management of irrigation frequency and nitrogen fertilization to mitigate GHG and NO emissions from drip-fertigated crops
Autor/es:
  • Ábalos Rodríguez, Diego
  • Sánchez Martín, Laura
  • García Torres, Lourdes
  • Van Groenigen, Jan Willem
  • Vallejo Garcia, Antonio
Tipo de Documento: Artículo
Título de Revista/Publicación: Science of the Total Environment
Fecha: Agosto 2014
Volumen: 490
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Química y Análisis Agrícola [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Drip irrigation combined with split application of fertilizer nitrogen (N) dissolved in the irrigation water (i.e. drip fertigation) is commonly considered best management practice for water and nutrient efficiency. As a consequence, its use is becoming widespread. Some of the main factors (water-filled pore space, NH4+ and NO3−) regulating the emissions of greenhouse gases (i.e. N2O, CO2 and CH4) and NO from agroecosystems can easily be manipulated by drip fertigation without yield penalties. In this study, we tested management options to reduce these emissions in a field experiment with a melon (Cucumis melo L.) crop. Treatments included drip irrigation frequency (weekly/daily) and type of N fertilizer (urea/calcium nitrate) applied by fertigation. Crop yield, environmental parameters, soil mineral N concentrations and fluxes of N2O, NO, CH4 and CO2 were measured during 85 days. Fertigation with urea instead of calcium nitrate increased N2O and NO emissions by a factor of 2.4 and 2.9, respectively (P < 0.005). Daily irrigation reduced NO emissions by 42% (P < 0.005) but increased CO2 emissions by 21% (P < 0.05) compared with weekly irrigation. We found no relation between irrigation frequency and N2O emissions. Based on yield-scaled Global Warming Potential as well as NO cumulative emissions, we conclude that weekly fertigation with a NO3−-based fertilizer is the best option to combine agronomic productivity with environmental sustainability. Our study shows that adequate management of drip fertigation, while contributing to the attainment of water and food security, may provide an opportunity for climate change mitigation.

Más información

ID de Registro: 35752
Identificador DC: http://oa.upm.es/35752/
Identificador OAI: oai:oa.upm.es:35752
Identificador DOI: 10.1016/j.scitotenv.2014.05.065
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0048969714007451
Depositado por: Memoria Investigacion
Depositado el: 29 Jun 2015 14:14
Ultima Modificación: 31 Ago 2016 22:30
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