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	Provedor de dados Chilean J. Agric. Res. (3) R.C. Suelo Nutr. Veg. (1) Autor Muñoz,Cristina (4) Zagal,Erick (3) Paulino,Leandro (2) Berben,Peter (1) Giltrap,Donna (1) Jha,Neha (1) Monreal,Carlos (1) Ovalle,Carlos (1) Saggar,Surinder (1) Vera,Jenniffer (1) Mais... Palavra-chave Nitrous oxide (2) Soil biological processes (2) Acacia caven (1) Agricultural soil (1) Agriculture (1) Air pollution (1) Carbon dioxide (1) Degraded ecosystems (1) Denitrification (1) Gases monitoring (1) Global change (1) Global warming (1) Greenhouse gases (1) Methane (1) Nitrification (1) Nitrogen (1) Soil organic carbon (1) Soil use intensity (1) Mais... Tipo do documento Journal article (4) Ano 2011 (2) 2010 (1) 2007 (1) País Chile (4) Idioma Inglês (3) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Distribución del carbono orgánico del suelo almacenado en el perfil de un Alfisol en ecosistemas Mediterráneos de Chile R.C. Suelo Nutr. Veg. Muñoz,Cristina; Ovalle,Carlos; Zagal,Erick. The overexploitation of the natural resources in the Mediterranean-type climate region of Chile, has resulted in natural forest fragmentation and expansion of Acacia caven (Mol), forming the ‘Espinal’ ecosystem (EE) that includes two million of hectares in the Central part of Chile. The effect of the anthropogenic intervention over the soil organic carbon (SOC) in these ecosystems is unknown. The aim of this study was to quantify the SOC stocks and it profile distribution in the EE. This was achieved by collecting soils samples according to soil coverage percentage canopy from: well-preserved Espinal (WPE), 51-80 %; good-preserved (GE), 26-50 %; degraded (DE), 11-25 % and very degraded (VDE), 0-10 %. We also included a native forest (NF), 80-98 % of soil... Tipo: Journal article Palavras-chave: Acacia caven; Degraded ecosystems; Soil use intensity. Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000100002 Greenhouse Gas (CO2 AND N2O) Emissions from Soils: A Review Chilean J. Agric. Res. 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 Influence of Waiting Time after Insertion of Base Chamber into Soil on Produced Greenhouse Gas Fluxes Chilean J. Agric. Res. Muñoz,Cristina; Saggar,Surinder; Berben,Peter; Giltrap,Donna; Jha,Neha. The soil chamber technique is most commonly used for measuring gas exchange between soil surfaces and the atmosphere, to understand regulatory processes relevant to determine the greenhouse gas (GHG) emissions from soils and to improve the emissions inventory of agricultural systems. The chambers are inserted into the soil to avoid the lateral diffusion of the gases. However, soil disturbance caused by chamber insertion causes in degassing and can result in erroneous flux data from measurements made immediately following chamber insertion. Here we assess the effect of soil disturbance associated with the insertion of the chambers on nitrous oxide (N2O) and methane (CH4) fluxes with and without N fertilization, from a New Zealand pasture soil. We collected... Tipo: Journal article Palavras-chave: Nitrous oxide; Methane; Agricultural soil; Soil biological processes; Gases monitoring. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400017 CO2 and N2O emissions from an Andisol in Chile under a no-till system using non-fixed closed chambers Chilean J. Agric. Res. 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 Registros recuperados: 4 Primeira ... 1 ... Última

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