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Agronomy 2019, 9(2), 102; https://doi.org/10.3390/agronomy9020102

3,4-Dimethylpyrazole Phosphate (DMPP) Reduces N2O Emissions from a Tilled Grassland in the Bogotá Savanna

1
Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Apdo. 644, E-48080 Bilbao, Spain
2
Colombian Corporation of Agricultural Research, AGROSAVIA, Tibaitatá Research Center, Km 14 Vía Mosquera, Bogota 250047, Colombia
*
Author to whom correspondence should be addressed.
Received: 15 January 2019 / Revised: 10 February 2019 / Accepted: 19 February 2019 / Published: 21 February 2019
(This article belongs to the Special Issue Strategies for Greenhouse Gas Emissions Mitigation)
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Abstract

Grasslands are subject to a wide range of land management practices that influence the exchange of the three main agricultural greenhouse gases (GHGs) that are related to agriculture: carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4). Improving nitrogen fertilization management practices through the use of nitrification inhibitors (NIs) can reduce GHGs emissions. We conducted a field experiment at the Colombian Agricultural Research Corporation with four fertilization treatments: urea (typical fertilizer used in this region), ammonium sulfate nitrate (ASN), ASN plus the NI 3,4-dimethylpyrazole phosphate (ASN+DMPP), and an unfertilized control. The highest grassland yields (1956 and 2057 kg DM ha−1, respectively) and apparent fertilizer nitrogen recoveries (34% and 33%, respectively) were generated by the conventional urea fertilizer and ASN+DMPP. Furthermore, the use of ASN+DMPP reduced the N2O emissions that were related to N fertilization to the level of the unfertilized treatment (ca. 1.5 g N2O-N ha−1), with a significant reduction of N-yield-scaled N2O emissions (ca. 20 g N2O-N kg N uptake−1). These results support the application of DMPP as an alternative strategy to increase grassland yield while simultaneously reducing the environmental impact of N fertilization. View Full-Text
Keywords: methane; nitrous oxide; pasture; tillage; yield-scaled N2O emissions methane; nitrous oxide; pasture; tillage; yield-scaled N2O emissions
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Huérfano, X.; Menéndez, S.; Bolaños-Benavides, M.-M.; González-Murua, C.; Estavillo, J.-M. 3,4-Dimethylpyrazole Phosphate (DMPP) Reduces N2O Emissions from a Tilled Grassland in the Bogotá Savanna. Agronomy 2019, 9, 102.

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