Effects of forest conversion to pasture on soil carbon content and dynamics in Brazilian Amazonia

Desjardins, Thierry; Barros, Eleusa; Sarrazin, Max; Girardin, Cyril; Mariotti, André

doi:10.1016/j.agee.2003.12.008

Cited by 125 publications

(106 citation statements)

References 22 publications

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“…The effects of the conversion of native vegetation to cropland or pasture on C storage are well known (Del Galdo et al, 2003;Desjardins et al, 2004;Romkens et al, 1999). In contrast, less is known about the dynamics of soil organic carbon (SOC) after agricultural abandonment, and this is especially true for Mediterranean areas (Alberti et al, 2011;La Mantia et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

et al. 2013

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Section: Introductionmentioning

confidence: 99%

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

et al. 2013

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“…Elephant grass (Pennisetum purpureum L.), a frequently used grass for cover crops (Opara-Nadi, 1993;Scopel et al, 2004), was introduced in NE Argentina in the last few years, Soil C balance under grasses depends on the stability of the SOM derived from the previous vegetation, the rates of SOM input from the new established grass and its stability. When trees and shrubs (dominantly C 3 species) are replaced by grasses (predominantly C 4 ) it is possible to determine the origin of the SOM from its isotopic composition (Balesdent et al, 1987;Chonè et al, 1991;Bonde et al, 1992;McDonagh et al, 2001;Roscoe et al, 2004;Desjardins et al, 2004;Schwendenmann & Pendall, 2006). Furtherover, the use of 13 C natural abundance technique together with simple mathematical approaches have further improved SOM turnover studies (Noordwijk et al, 1997;Bernoux et al, 1998;Wynn et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Changes in soil organic matter under different land management in misiones province (Argentina)

Píccolo

Andriulo

Mary³

2008

Sci. agric. (Piracicaba, Braz.)

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Highly weathered tropical soils rapidly loose soil organic matter (SOM) and may be affected by water erosion and soil compaction after deforestation and intensive cultivation. With the main objective to estimate the SOM balances in a subtropical soil we determined the dynamics of SOM in a degraded yerba mate (Ilex paraguaiensis Saint Hil.) plantation introduced after deforestation and with elephant grass (Pennisetum purpureum L.) as a cover crop. The study site was in Misiones, Argentina, and we use the natural 13 C abundance methodology and a descriptive model. The study was conducted on three contiguous 50 × 100 m plots of a typic Kandihumult soil with: (i) native forest, (ii) 50 years of continuous yerba mate monoculture with intensive tillage, and (iii) yerba mate associated with elephant grass as a cover crop and no tillage. We determined bulk density, carbon (C), nitrogen (N) and 13 C content of the soil (0 -0.05, 0.05 -0.15 m layers) and the grass biomass. Yerba mate monoculture reduced soil C and N content as well as porosity at 0 -0.15 m depth by 43 and 23%, respectively, as compared to the native forest. After ten years of yerba mate -elephant grass association soil C and N contents at the same depth increased by 19 and 12%, respectively, compared to the yerba mate monoculture, while soil porosity remained similar. Total C input, 13 C, and soil organic C were incorporated into a three compartment model to evaluate elephant grass C dynamics. Through the natural 13 C abundance methodology we tracked the elephant grass C incorporation and the "old" soil C loss, and determined the model parameters -humification (k 1 ) and mineralization (k) coefficients and stable C (C s )-unambiguously. The high k 1 and k predicted by the model are probably explained by elephant grass root system incorporation under no tillage and humid subtropical climate, respectively. In soil under yerba mate monoculture, C s was counted as 91% of the total soil organic C. Key words: Ilex paraguaiensis, Pennisetum purpureum, natural 13 C abundance, soil carbon, modelling MUDANÇAS NA MATÉRIA ORGÂNICA EDAFICA SOB DIFERENTES MANEJOS DE SOLO NA PROVÍNCIA DE MISIONES (ARGENTINA)RESUMO: Os solos altamente intemperizados dos trópicos perdem rapidamente matéria orgânica do solo (SOM) e podem ser afetados pela erosão hídrica e compactação depois de seu deflorestamento e agricultura contínua. O objetivo foi determinar a dinâmica da matéria orgânica do solo com capimelefante (Pennisetum purpureum L.) em um Kandihumult da província de Misiones (Argentina) após desmatamento e cultivo contínuo de erva-mate (Ilex paraguaiensis Saint Hil.), utilizando a metodologia da abundância natural em carbono 13 ( 13 C) e um modelo descritivo. O estudo foi conduzido em três parcelas contíguas de 50 × 100 m. As situações comparadas foram: (a) floresta nativa, e (b) local com 50 anos de monocultivo intensivo de erva-mate, e (c) erva-mate associada com capim-elefante como cultivo de cobertura sob plantio direto. Determinaram-se os conteúdos de carbono (C),...

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“…The current concern is for studies which quantify the changes in content and carbon stocks in areas of traditional agriculture (SERGNINI et al, 2013;CERRI et al, 2013), as well as the mensuration carbon losses in Amazonian soils due the replacement of native forest for pasture (DESJARDINS et al, 2004;COSTA et al, 2009;). …”

Section: Introductionmentioning

confidence: 99%

Soil Organic Carbon, Carbon Stock and Their Relationships to Physical Attributes Under Forest Soils in Central Amazonia

et al. 2016

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-The soil carbon under Amazonian forests has an important roles in global changing, making information on the soil content and depths of these stocks are considerable interest in efforts to quantify soil carbon emissions to the atmosphere.This study quantified the content and soil organic carbon stock under primary forest up to 2 m depth, at different topographic positions, at Cuieiras Biological Reserve, Manaus/ ZF2, km 34, in the Central Amazon, evaluating the soil attributes that may influence the permanence of soil carbon. Soil samples were collected along a transect of 850 m on topographic gradient Oxisol (plateau), Ultisol (slope) and Spodosol (valley). The stocks of soil carbon were obtained by multiplying the carbon content, soil bulk density and trickiness of soil layers. The watershed was delimited by using STRM and IKONOS images and the carbon contend obtained in the transects was extrapolated as a way to evaluate the potential for carbon stocks in an area of 2678.68 ha. The total SOC was greater in Oxisol followed by Spodosol and Ultisol. It was found direct correlations between the SOC and soil physical attributes. Among the clay soils (Oxisol and Ultisol), the largest stocks of carbon were observed in Oxisol at both the transect (90 to 175.5 Mg C ha -1 ) as the level of watershed (100.2 to 195.2 Mg C ha -1 ). The carbon stocks under sandy soil (Spodosol) was greater to clay soils along the transect (160-241 Mg C ha -1 ) and near them in the Watershed (96.90 to 146.01 Mg C ha -1 ).Keywords: Carbon; Soil physical properties; Amazonian forest. CARBONO ORGÂNICO DO SOLO, ESTOQUE DE CARBONO E SUA RELAÇÃO COM ATRIBUTOS FÍSICOS SOB SOLOS FLORESTAIS NA AMAZÔNIA CENTRALRESUMO -O carbono do solo sob floresta amazônica tem um papel importante na mudança global, tornando as informações sobre os teores de carbono e profundidades desses estoques são de grande interesse no esforço de quantificar as emissoes de carbono do solo para a atmosfera. Este estudo quantificou os teores e estoques de carbono orgânico do solo sob floresta primária até 2 m de profundidade, em diferentes posições topográficas, na Reserva Biológica do Cueiras, Manaus/ZF2, km34, na Amazônia Central; avaliando-se os atributos do solo que podem influenciar na permanência do carbono no solo. Coletaram-se amostras de solos ao longo de um transecto de 850 m num gradiente topográfico Latossolo (platô), Argissolo (vertente) e Espodossolo (baixio). Os estoques de carbono do solo foram obtidos multiplicando a concentração de carbono pela densidade do solo e espessura de camadas do solo. Delimitou-se uma microbacia hidrográfica através de imagens STRM e IKONOS extrapolando-se os teores de carbono obtidos no transecto como forma de avaliar o potencial de estocagem de carbono em uma área de 2.678,68 ha. O total de COS foi maior no Latossolo seguido

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Effects of forest conversion to pasture on soil carbon content and dynamics in Brazilian Amazonia

Cited by 125 publications

References 22 publications

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

Changes in soil organic matter under different land management in misiones province (Argentina)

Soil Organic Carbon, Carbon Stock and Their Relationships to Physical Attributes Under Forest Soils in Central Amazonia

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