Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil

A range of technologies is available to reduce greenhouse gas emissions from agricultural systems. Among these, applying N transformation inhibitors is promising in reducing nitrous oxide (N2O) emissions in both arable and pastoral soils. A randomized complete block design with six replicates was us...

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Autores principales:	Vistoso,Erika, Alfaro,Marta, Saggar,Surinder, Salazar,Francisco
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2012
Materias:	Andisol emission factor urease inhibitor nitrification inhibitor urea
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100021
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spelling	oai:scielo:S0718-583920120001000212018-10-01Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic SoilVistoso,ErikaAlfaro,MartaSaggar,SurinderSalazar,Francisco Andisol emission factor urease inhibitor nitrification inhibitor urea A range of technologies is available to reduce greenhouse gas emissions from agricultural systems. Among these, applying N transformation inhibitors is promising in reducing nitrous oxide (N2O) emissions in both arable and pastoral soils. A randomized complete block design with six replicates was used to quantify the effect of urease (UI) and nitrification (NI) inhibitors on N2O emissions and pasture production from permanent pasture in an Andisol after autumn-applied urea. The N2O emissions were measured periodically for 8 wk with PVC stationary chambers. Mineral N, DM yield, N concentration, and N uptake were analyzed. Our results show that adding fertilizer (40 kg N ha-1) significantly increased N2O emissions by 281% over the control treatment (P < 0.05) and adding N inhibitors to fertilizer N resulted in a 10%-29% reduction in emissions. Both inhibitors initially reduced nitrate-N production in the Andisol (Osorno series) either by slowing urea hydrolysis or the nitrification process. Increases in pasture yield (8%-13%), N concentration (7%-9%), and N uptake (46%-56%) were measured by adding N inhibitors with urea. Emission factors, measured under field conditions in Chile after autumn- applied urea and N inhibitors (applied alone or combined), were very low (0.052%-0.114%) compared with values reported in the literature and the Intergovernmental Panel on Climate Change (IPCC) default value (1%). Using these technologies could contribute to Chile’s nationally established goal of a 20% reduction in greenhouse gas emissions by 2020.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.72 n.1 20122012-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100021en10.4067/S0718-58392012000100021
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Andisol emission factor urease inhibitor nitrification inhibitor urea
spellingShingle	Andisol emission factor urease inhibitor nitrification inhibitor urea Vistoso,Erika Alfaro,Marta Saggar,Surinder Salazar,Francisco Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil
description	A range of technologies is available to reduce greenhouse gas emissions from agricultural systems. Among these, applying N transformation inhibitors is promising in reducing nitrous oxide (N2O) emissions in both arable and pastoral soils. A randomized complete block design with six replicates was used to quantify the effect of urease (UI) and nitrification (NI) inhibitors on N2O emissions and pasture production from permanent pasture in an Andisol after autumn-applied urea. The N2O emissions were measured periodically for 8 wk with PVC stationary chambers. Mineral N, DM yield, N concentration, and N uptake were analyzed. Our results show that adding fertilizer (40 kg N ha-1) significantly increased N2O emissions by 281% over the control treatment (P < 0.05) and adding N inhibitors to fertilizer N resulted in a 10%-29% reduction in emissions. Both inhibitors initially reduced nitrate-N production in the Andisol (Osorno series) either by slowing urea hydrolysis or the nitrification process. Increases in pasture yield (8%-13%), N concentration (7%-9%), and N uptake (46%-56%) were measured by adding N inhibitors with urea. Emission factors, measured under field conditions in Chile after autumn- applied urea and N inhibitors (applied alone or combined), were very low (0.052%-0.114%) compared with values reported in the literature and the Intergovernmental Panel on Climate Change (IPCC) default value (1%). Using these technologies could contribute to Chile’s nationally established goal of a 20% reduction in greenhouse gas emissions by 2020.
author	Vistoso,Erika Alfaro,Marta Saggar,Surinder Salazar,Francisco
author_facet	Vistoso,Erika Alfaro,Marta Saggar,Surinder Salazar,Francisco
author_sort	Vistoso,Erika
title	Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil
title_short	Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil
title_full	Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil
title_fullStr	Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil
title_full_unstemmed	Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil
title_sort	effect of nitrogen inhibitors on nitrous oxide emissions and pasture growth after an autumn application in volcanic soil
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100021
work_keys_str_mv	AT vistosoerika effectofnitrogeninhibitorsonnitrousoxideemissionsandpasturegrowthafteranautumnapplicationinvolcanicsoil AT alfaromarta effectofnitrogeninhibitorsonnitrousoxideemissionsandpasturegrowthafteranautumnapplicationinvolcanicsoil AT saggarsurinder effectofnitrogeninhibitorsonnitrousoxideemissionsandpasturegrowthafteranautumnapplicationinvolcanicsoil AT salazarfrancisco effectofnitrogeninhibitorsonnitrousoxideemissionsandpasturegrowthafteranautumnapplicationinvolcanicsoil
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Effect of Nitrogen Inhibitors on Nitrous Oxide Emissions and Pasture Growth After an Autumn Application in Volcanic Soil

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