Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors

Abstract Nitrogen (N) gaseous losses have environmental and economic implications. Ammonia (NH3) volatilization and nitrous oxide (N2O) emissions from a volcanic soil were concurrently quantified using intact lysimeters, after application of the equivalent to 100 kg N ha-1 with and without urease (N...

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Autores principales:	Alfaro,Marta, Salazar,Francisco, Hube,Sara, Ramírez,Luis, Mora,Ma. Soledad
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2018
Materias:	Ammonia volatilization nitrous oxide emissions NBPT DCD Ultisol
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000200479
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spelling	oai:scielo:S0718-951620180002004792018-11-21Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitorsAlfaro,MartaSalazar,FranciscoHube,SaraRamírez,LuisMora,Ma. Soledad Ammonia volatilization nitrous oxide emissions NBPT DCD Ultisol Abstract Nitrogen (N) gaseous losses have environmental and economic implications. Ammonia (NH3) volatilization and nitrous oxide (N2O) emissions from a volcanic soil were concurrently quantified using intact lysimeters, after application of the equivalent to 100 kg N ha-1 with and without urease (NBPT) and nitrification (DCD) inhibitor: Urea, Urea+NBPT, Urea+DCD, Dairy slurry and Dairy slurry+DCD. A control treatment (-N) was also included. Treatments were distributed on a randomized block design and evaluated during 28 days. Ammonia was analyzed for NH4 by colorimetry, while N2O was estimated by gas chromatography. Total emissions were estimated by addition of daily fluxes, and results were analyzed by ANOVA. Ammonia was the main N loss, with 35 to 43% and 5% to 16% of the total N applied in Urea and Dairy slurry (P<0.01), respectively, with and without inhibitors (P>0.05). The use of DCD reduced N2O emissions by 44 and 8% in the same treatments, respectively (P<0.05). Results suggest that DCD has a potential as a mitigation option in grassland volcanic soils reducing N2O losses. The use of NBPT did not reduce NH3 losses and N2O emissions when applied with urea. Concurrent N gasses losses from soil showed that indirect N2O losses following NH3 volatilization might be more relevant in volcanic soils than direct N2O losses.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.18 n.2 20182018-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000200479en10.4067/S0718-95162018005001501
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ammonia volatilization nitrous oxide emissions NBPT DCD Ultisol
spellingShingle	Ammonia volatilization nitrous oxide emissions NBPT DCD Ultisol Alfaro,Marta Salazar,Francisco Hube,Sara Ramírez,Luis Mora,Ma. Soledad Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
description	Abstract Nitrogen (N) gaseous losses have environmental and economic implications. Ammonia (NH3) volatilization and nitrous oxide (N2O) emissions from a volcanic soil were concurrently quantified using intact lysimeters, after application of the equivalent to 100 kg N ha-1 with and without urease (NBPT) and nitrification (DCD) inhibitor: Urea, Urea+NBPT, Urea+DCD, Dairy slurry and Dairy slurry+DCD. A control treatment (-N) was also included. Treatments were distributed on a randomized block design and evaluated during 28 days. Ammonia was analyzed for NH4 by colorimetry, while N2O was estimated by gas chromatography. Total emissions were estimated by addition of daily fluxes, and results were analyzed by ANOVA. Ammonia was the main N loss, with 35 to 43% and 5% to 16% of the total N applied in Urea and Dairy slurry (P<0.01), respectively, with and without inhibitors (P>0.05). The use of DCD reduced N2O emissions by 44 and 8% in the same treatments, respectively (P<0.05). Results suggest that DCD has a potential as a mitigation option in grassland volcanic soils reducing N2O losses. The use of NBPT did not reduce NH3 losses and N2O emissions when applied with urea. Concurrent N gasses losses from soil showed that indirect N2O losses following NH3 volatilization might be more relevant in volcanic soils than direct N2O losses.
author	Alfaro,Marta Salazar,Francisco Hube,Sara Ramírez,Luis Mora,Ma. Soledad
author_facet	Alfaro,Marta Salazar,Francisco Hube,Sara Ramírez,Luis Mora,Ma. Soledad
author_sort	Alfaro,Marta
title	Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
title_short	Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
title_full	Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
title_fullStr	Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
title_full_unstemmed	Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
title_sort	ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000200479
work_keys_str_mv	AT alfaromarta ammoniaandnitrousoxideemissionsasaffectedbynitrificationandureaseinhibitors AT salazarfrancisco ammoniaandnitrousoxideemissionsasaffectedbynitrificationandureaseinhibitors AT hubesara ammoniaandnitrousoxideemissionsasaffectedbynitrificationandureaseinhibitors AT ramirezluis ammoniaandnitrousoxideemissionsasaffectedbynitrificationandureaseinhibitors AT moramasoledad ammoniaandnitrousoxideemissionsasaffectedbynitrificationandureaseinhibitors
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Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors

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