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	Provedor de dados 70 (2) Autor Lopes,Afonso (2) Teixeira,Luis G (2) Fukuda,Adrian (1) La Scala Jr,Newton (1) Panosso,Alan R (1) Scala Jr,Newton La (1) Mais... Palavra-chave Soil respiration (2) Soil tillage (2) Carbon dioxide (1) Greenhouse effect (1) Soil CO2 emission (1) Temporal variability of soil CO2 emission (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 2010 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Temporal variability of soil CO2 emission after conventional and reduced tillage described by an exponential decay in time model 70 Teixeira,Luis G; Lopes,Afonso; La Scala Jr,Newton. To study Assessing the impact of tillage practices on soil carbon losses dependents it is necessary to describe the temporal variability of soil CO2 emission after tillage. It has been argued that large amounts of CO2 emitted after tillage may serve as an indicator for longer-term changes in soil carbon stocks. Here we present a two-step function model based on soil temperature and soil moisture including an exponential decay in time component that is efficient in fitting intermediate-term emission after disk plow followed by a leveling harrow (conventional), and chisel plow coupled with a roller for clod breaking (reduced) tillage. Emission after reduced tillage was described using a non-linear estimator with determination coefficient (R²) as high as... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil respiration; Soil CO2 emission; Soil tillage; Greenhouse effect. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162010000200004 Soil CO2 emission as related to incorporation of sugarcane crop residues and aggregate breaking after rotary tiller 70 Teixeira,Luis G; Fukuda,Adrian; Panosso,Alan R; Lopes,Afonso; Scala Jr,Newton La. Soil tillage is a process that accelerates soil organic matter decomposition transferring carbon to atmosphere, mainly in the CO2 form. In this study, the effect of rotary tillage on soil CO2 emission was investigated, including the presence of crop residues on the surface.Emissions were evaluated during 15 days after tillage in 3 plots: 1) non-tilled and without crop residues on soil surface (NTwo), 2) rotary tiller without the presence of crop residues on soil surface (RTwo), and 3) rotary tiller with the presence of crop residues in soil surface (RTw). Emissions from the RTw plot were higher than the other plots, (0.777 g CO2 m-2 h-1), with the lowest emissions recorded in the NTwo plot (0.414 g CO2 m-2 h-1). Total emission indicates that the difference... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil respiration; Soil tillage; Carbon dioxide; Temporal variability of soil CO2 emission. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600005 Registros recuperados: 2 Primeira ... 1 ... Última

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