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	Provedor de dados 117 (2) 73 (2) Autor Paulino,Leandro (4) Godoy,Roberto (2) Muñoz,Cristina (2) Oyarzún,Carlos (2) Zagal,Erick (2) Barrientos,Mónica (1) Boeckx,Pascal (1) Haneke,Jörgen (1) Monreal,Carlos (1) Staelens,Jeroen (1) Vera,Jenniffer (1) Mais... Palavra-chave Atmospheric deposition (2) Nitrogen (2) Agriculture (1) Air pollution (1) Carbon dioxide (1) Central and southern Chile (1) Denitrification (1) Global change (1) Global warming (1) Greenhouse gases (1) Mineral N (1) Nitrification (1) Nitrous oxide (1) Nothofagus obliqua forest (1) Organic N (1) Pinus radiata plantation (1) Soil biological processes (1) Soil organic carbon (1) Surrogate surface (1) Mais... Tipo do documento Journal article (4) Ano 2011 (1) 2010 (1) 2005 (1) 2003 (1) País Chile (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Greenhouse Gas (CO2 AND N2O) Emissions from Soils: A Review 117 Muñoz,Cristina; Paulino,Leandro; Monreal,Carlos; Zagal,Erick. In agricultural activities, the main greenhouse gases (GHG) are those related to C and N global cycles. The impact of agriculture on GHG emissions has become a key issue, especially when considering that natural C and N cycles are influenced by agricultural development. This review focuses on CO2 and N2O soil emissions in terrestrial ecosystems, with emphasis in Chilean and similar agro-ecosystems around the world. The influence of land use and crop management practices on CO2 and N2O emissions is analyzed; some mitigation measures to reduce such emissions are also discussed here. More knowledge on the biological processes that promote of GHG emissions from soil will allow creating opportunities for agricultural development under friendly-environmental... Tipo: Journal article Palavras-chave: Global warming; Carbon dioxide; Nitrous oxide; Soil biological processes; Soil organic carbon; Nitrification; Denitrification. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300016 CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers 117 Muñoz,Cristina; Paulino,Leandro; Vera,Jenniffer; Zagal,Erick. 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... Tipo: Journal article Palavras-chave: Greenhouse gases; Agriculture; Nitrogen; Global change; Air pollution. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200013 ATMOSPHERIC N DEPOSITION IN CENTRAL AND SOUTHERN CHILE: AN OVERVIEW 73 Godoy,Roberto; Paulino,Leandro; Oyarzún,Carlos; Boeckx,Pascal. Temperate forests in Chile are not yet affected by elevated nitrogen (N) deposition. However, anthropogenic activities such as transport, industry and agriculture have been increasing in central and southern Chile. These activities can substantially alter the atmospheric N load and subsequently N deposition. Nitrogen deposition data for central and southern Chile are scares and scattered. In order to assess trends of N deposition a good knowledge of past and current N depositions is however essential. This study presents an overview of the existing N deposition data in Chile. In central Chile, dry deposition has been estimated at 0.8 kg NO3--N ha-1 yr-1 and 1.0 kg NH4+-N ha-1 yr-1, giving a total of 1.8 kg N ha-1 yr-1 and wet deposition was 0.4 kg NO3--N... Tipo: Journal article Palavras-chave: Atmospheric deposition; Central and southern Chile; Mineral N; Organic N. Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100008 Dry deposition of nitrogen to passive samplers in grassland and forest canopies in the Central depression of southern Chile 73 Godoy,Roberto; Haneke,Jörgen; Staelens,Jeroen; Oyarzún,Carlos; Paulino,Leandro; Barrientos,Mónica. The growth of intensive livestock farming in the central depression of southern Chile (40° S) during the last century has resulted in elevated emissions of inorganic nitrogen (N) compounds into the atmosphere, particularly of NH3. Consequently, atmospheric N has been deposited to lakes, vegetation, and soil. Much attention has been paid to wet N deposition in southern Chile, while almost nothing is known about dry N deposition in this region. Our aim is to use an exploratory approach with SAM (Standard Air Monitoring) filters to investigate the potential contribution of the dry N deposition to the total N deposition in the central depression of southern Chile. Furthermore, the relationship between micro-climatological patterns and dry deposition was... Tipo: Journal article Palavras-chave: Atmospheric deposition; Nitrogen; Nothofagus obliqua forest; Pinus radiata plantation; Surrogate surface. Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200006 Registros recuperados: 4 Primeira ... 1 ... Última

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