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	Provedor de dados Scientia Agricola (1) Ciência e Agrotecnologia (1) Autor Spokas,Kurt (2) Archer,David Walter (1) Colosky,Edward (1) Hall,Kate (1) La Scala Jr.,Newton (1) Lopes,Afonso (1) Reicosky,Donald (1) Scala,Newton La (1) Souza,Zigomar Menezes de (1) Tavares,Rose Luiza Moraes (1) Mais... Palavra-chave CH4. (1) CO2 (1) Labile carbon decay (1) N2O (1) Sacharium officinarium (1) Slope (1) Soil organic matter (1) Soil respiration (1) Soil tillage (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (1) 2009 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última First-order decay models to describe soil C-CO2 Loss after rotary tillage Scientia Agricola La Scala Jr.,Newton; Lopes,Afonso; Spokas,Kurt; Archer,David Walter; Reicosky,Donald. To further understand the impact of tillage on CO2 emission, the applicability of two conceptual models was tested, which describe the CO2 emission after tillage as a function of the non-tilled emission plus a correction due to the tillage disturbance. Models assume that C in readily decomposable organic matter follows a first-order reaction kinetics equation as: dCsoil (t) / dt = -k Csoil (t), and that soil C-CO2 emission is proportional to the C decay rate in soil, where Csoil(t) is the available labile soil C (g m-2) at any time (t) and k is the decay constant (time-1). Two possible assumptions were tested to determine the tilled (F T) fluxes: the decay constants (k) of labile soil C before and after tillage are different (Model 1) or not (Model 2).... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil respiration; Soil tillage; Soil organic matter; Labile carbon decay. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000500010 Sugarcane residue management impact soil greenhouse gas Ciência e Agrotecnologia Tavares,Rose Luiza Moraes; Spokas,Kurt; Hall,Kate; Colosky,Edward; Souza,Zigomar Menezes de; Scala,Newton La. ABSTRACT Mechanized sugarcane harvest is replacing the historic practice of field burning, due to environmental concerns of the particulate and emissions during burning. However, the impact of these practices on soil greenhouse gas (GHG) production potential is not fully known. Thus, the present work quantified the potential production, in 1 g of soil, of greenhouse gases (GHG) in three systems of sugarcane management. The systems were: area with a history of burning sugarcane before harvest (B) and another with two systems of management of “green sugarcane” in two periods of implantation - 5 (G-5) and 10 years (G-10). A laboratory incubation experiment was used to assess the production potentials of carbon dioxide (CO2), nitrous oxide (N2O) and methane... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sacharium officinarium; Slope; CO2; N2O; CH4.. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000200195 Registros recuperados: 2 Primeira ... 1 ... Última

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