CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers

Chile has different types of soil and climate conditions that favor a wide range of agricultural activities that can generate potential atmospheric contamination like greenhouse gases (GHG). Nevertheless, the contribution of agricultural soils to atmospheric emissions has yet to be measured in Chile...

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Autores principales:	Muñoz,Cristina, Paulino,Leandro, Vera,Jenniffer, Zagal,Erick
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	Greenhouse gases agriculture nitrogen global change air pollution
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200013
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spelling	oai:scielo:S0718-583920110002000132018-10-01CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambersMuñoz,CristinaPaulino,LeandroVera,JennifferZagal,Erick Greenhouse gases agriculture nitrogen global change air pollution Chile has different types of soil and climate conditions that favor a wide range of agricultural activities that can generate potential atmospheric contamination like greenhouse gases (GHG). Nevertheless, the contribution of agricultural soils to atmospheric emissions has yet to be measured in Chile. The aim of this study was to assess seasonal variability of CO2 and N2O effluxes in situ from a volcanic ash-derived soil under different agronomic management practices. Gas samples were obtained from headspaces of non-fixed closed chambers in an annual crop rotation under a no-till system in an Andisol in southern Chile (36° S). Two N-sources (NH4+ and NO3-) and ammonium fertilization plus two lime doses (0.5 and 1 Mg ha-1) were considered for soil treatments Effluxes of CO2 and N2O were determined periodically for 1 yr, and soil variables, such as temperature, water, and mineral N content, were recorded. Results showed that CO2 effluxes respond to a seasonal pattern. No effect was evidenced when considering crop management practices with a maximum of 53.2 ± 8.5 kg CO2-C ha-1 d-1 in the wet fall period and a minimum of 9.7 ± 2.1 kg CO2-C ha-1 d-1 for summer, fall dry period, and winter. N2O efflux was highly variable throughout the year and showed no influence of treatments or season variability with a mean of 0.95 kg N2O-N ha-1 yr-1. Soil mineral N variations are not related to GHG effluxes as a single variable. Results indicate that an Andisol under a no-till system in southern Chile has a low N2O emission potential, and higher CO2 emissions are mainly produced in wet seasons (wet fall and/or spring).info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.2 20112011-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200013en10.4067/S0718-58392011000200013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Greenhouse gases agriculture nitrogen global change air pollution
spellingShingle	Greenhouse gases agriculture nitrogen global change air pollution Muñoz,Cristina Paulino,Leandro Vera,Jenniffer Zagal,Erick CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers
description	Chile has different types of soil and climate conditions that favor a wide range of agricultural activities that can generate potential atmospheric contamination like greenhouse gases (GHG). Nevertheless, the contribution of agricultural soils to atmospheric emissions has yet to be measured in Chile. The aim of this study was to assess seasonal variability of CO2 and N2O effluxes in situ from a volcanic ash-derived soil under different agronomic management practices. Gas samples were obtained from headspaces of non-fixed closed chambers in an annual crop rotation under a no-till system in an Andisol in southern Chile (36° S). Two N-sources (NH4+ and NO3-) and ammonium fertilization plus two lime doses (0.5 and 1 Mg ha-1) were considered for soil treatments Effluxes of CO2 and N2O were determined periodically for 1 yr, and soil variables, such as temperature, water, and mineral N content, were recorded. Results showed that CO2 effluxes respond to a seasonal pattern. No effect was evidenced when considering crop management practices with a maximum of 53.2 ± 8.5 kg CO2-C ha-1 d-1 in the wet fall period and a minimum of 9.7 ± 2.1 kg CO2-C ha-1 d-1 for summer, fall dry period, and winter. N2O efflux was highly variable throughout the year and showed no influence of treatments or season variability with a mean of 0.95 kg N2O-N ha-1 yr-1. Soil mineral N variations are not related to GHG effluxes as a single variable. Results indicate that an Andisol under a no-till system in southern Chile has a low N2O emission potential, and higher CO2 emissions are mainly produced in wet seasons (wet fall and/or spring).
author	Muñoz,Cristina Paulino,Leandro Vera,Jenniffer Zagal,Erick
author_facet	Muñoz,Cristina Paulino,Leandro Vera,Jenniffer Zagal,Erick
author_sort	Muñoz,Cristina
title	CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers
title_short	CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers
title_full	CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers
title_fullStr	CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers
title_full_unstemmed	CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers
title_sort	co2 and n2o emissions from an andisol in chile under a no-till system using non-fixed closed chambers
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200013
work_keys_str_mv	AT munozcristina co2andn2oemissionsfromanandisolinchileunderanotillsystemusingnonfixedclosedchambers AT paulinoleandro co2andn2oemissionsfromanandisolinchileunderanotillsystemusingnonfixedclosedchambers AT verajenniffer co2andn2oemissionsfromanandisolinchileunderanotillsystemusingnonfixedclosedchambers AT zagalerick co2andn2oemissionsfromanandisolinchileunderanotillsystemusingnonfixedclosedchambers
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CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers

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