eprintid: 35752 rev_number: 18 eprint_status: archive userid: 1903 dir: disk0/00/03/57/52 datestamp: 2015-06-29 14:14:27 lastmod: 2022-11-30 09:00:00 status_changed: 2019-06-05 12:29:50 type: article metadata_visibility: show creators_name: Ábalos Rodríguez, Diego creators_name: Sánchez Martín, Laura creators_name: García Torres, Lourdes creators_name: Van Groenigen, Jan Willem creators_name: Vallejo Garcia, Antonio creators_id: laura.sanchez@upm.es creators_id: antonio.vallejo@upm.es title: Management of irrigation frequency and nitrogen fertilization to mitigate GHG and NO emissions from drip-fertigated crops ispublished: pub subjects: agricultura abstract: 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. date: 2014-08 date_type: published official_url: http://www.sciencedirect.com/science/article/pii/S0048969714007451 id_number: 10.1016/j.scitotenv.2014.05.065 full_text_status: public publication: Science of the Total Environment volume: 490 pagerange: 880-888 institution: Agronomos department: Quimica_Analisis refereed: TRUE issn: 0048-9697 rights: by-nc-nd comprojects_type: MINECO comprojects_type: MINECO comprojects_type: CM comprojects_code: AGL2006-05208 comprojects_code: AGL2009-08412-AGR comprojects_code: S2009/AGR-1630 comprojects_leader: Universidad Politécnica de Madrid comprojects_leader: Universidad Politécnica de Madrid comprojects_leader: Universidad Politécnica de Madrid citation: Ábalos Rodríguez, Diego and Sánchez Martín, Laura and García Torres, Lourdes and Van Groenigen, Jan Willem and 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 . document_url: https://oa.upm.es/35752/1/INVE_MEM_2014_189108.pdf