Potencial de sequestro de carbono em diferentes biomas do Brasil

Carvalho, João Luís Nunes; Avanzi, Junior César; Silva, Marx Leandro Naves; Mello, Carlos Rogério de; Cerri, Carlos Eduardo Pellegrino

doi:10.1590/s0100-06832010000200001

Cited by 125 publications

(99 citation statements)

References 40 publications

(53 reference statements)

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“…According to Carvalho et al (2009), the increase in soil organic matter in NTS areas compared to other management systems can be linked primarily to the length of time since the introduction of NTS because the accumulation of carbon in this system occurs very slowly, taking from 10 to 15 years to become significant. The low levels of C in the PA area may be related to its low productivity, the lack of management, intensive grazing, the small input of plant residues and the reduction in the root system distribution.…”

Section: Resultsmentioning

confidence: 99%

“…The no-tillage system (NTS) was introduced in the 'Cerrado' region in 1981 as an alternative for minimizing the impacts on soil by agriculture using different methods (CARVALHO et al, 2010). However, the new environmental conditions created under NTS, such as increases in organic matter, increased humidity and water retention, in addition to a decrease in soil temperature (COSTA et al, 2003), can produce gradual mineralogical changes (KAMPF; and changes in the adsorption capacity of phosphorus (P) (CESSA et al, 2009) over time.…”

Section: Introductionmentioning

confidence: 99%

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<b>Adsorption of P and forms of iron in no-tillage areas in the ‘Cerrado’ biome

Guareschi¹,

Pereira²,

Perín³

2014

Acta Sci. Agron.

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ABSTRACT. The objective of this study was to evaluate the forms of iron extracted as sodium dithionitecitrate-bicarbonate (Fed), acid ammonium oxalate (Feo) and sodium pyrophosphate (Fep) and the relationship between these variables and the total organic carbon content and maximum adsorption capacity of P (MACP). The areas selected for this study had been using a no-tillage system (NTS) for varying periods of time: 3 years (NTS3), 15 years (NTS15) and 20 years (NTS20). These areas were compared with an area of native 'Cerrado' (CE) and a pasture area planted with Brachiaria decumbens (PA). The soil of the areas studied was classified as dystrophic oxisol. In each area, samples were collected at 0-5 cm and 5-10 cm. A correlation was observed between the C content and the different forms of Fe in the areas studied. There was a significant positive correlation between the carbon content and the forms of iron (Feo, Feo/Fed and Fep) and a negative correlation with the level of Fed. The areas of CE and PA had the highest MACP, which diminished as the amount of time of NTS use increased.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

<b>Adsorption of P and forms of iron in no-tillage areas in the ‘Cerrado’ biome

Guareschi¹,

Pereira²,

Perín³

2014

Acta Sci. Agron.

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“…The majority of the land used in Brazilian agriculture is for pasture, which has some soil carbon sequestration potential when pasture is integrated with agriculture; this also has the benefit of increasing agricultural production. Other recent results published in the literature (Carvalho et al, 2010a;Campos et al, 2011) indicate that there are even more appropriate management practices available that would result in the storage of absorbed atmospheric CO 2 as soil carbon associated with the main agricultural activities in Brazil. ) in pasture under different management in Brazil.…”

Section: Final Remarksmentioning

confidence: 99%

“…As almost 4 million hectares in sugarcane fields are still cropped under burned harvest, the mitigation potential in the soil carbon accumulation potential would be close to 6.9 Tg CO 2 per year, once all the Brazilian burned sugarcane areas would be converted to green harvest. Some scenarios are presented in Carvalho et al (2010a), based on higher residues input and better management practices that would be adopted resulting in mitigation potential from 26.4 to 78 Tg of soil C accumulated in a 20-year period in sugarcane areas. Recent studies have indicated that the simple conversion of sugarcane fields from burned to green harvest would not ensure significant increases in soil C stocks over time, as there is little understanding of the mechanisms in favour of sequestration or of what occurs in terms of soil C losses after soil tillage, at reform (La Scala et al, 2006).…”

Section: Sugarcane Fields: the Green Harvest Optionmentioning

confidence: 99%

A review on soil carbon accumulation due to the management change of major Brazilian agricultural activities

2012

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Agricultural areas deal with enormous CO 2 intake fluxes offering an opportunity for greenhouse effect mitigation. In this work we studied the potential of soil carbon sequestration due to the management conversion in major agricultural activities in Brazil. Data from several studies indicate that in soybean/maize, and related rotation systems, a significant soil carbon sequestration was observed over the year of conversion from conventional to no-till practices, with a mean rate of 0.41 Mg C ha -1 year -1. The same effect was observed in sugarcane fields, but with a much higher accumulation of carbon in soil stocks, when sugarcane fields are converted from burned to mechanised based harvest, where large amounts of sugarcane residues remain on the soil surface (1.8 Mg C ha -1 year -1 ). The higher sequestration potential of sugarcane crops, when compared to the others, has a direct relation to the primary production of this crop. Nevertheless, much of this mitigation potential of soil carbon accumulation in sugarcane fields is lost once areas are reformed, or intensive tillage is applied. Pasture lands have shown soil carbon depletion once natural areas are converted to livestock use, while integration of those areas with agriculture use has shown an improvement in soil carbon stocks. Those works have shown that the main crop systems of Brazil have a huge mitigation potential, especially in soil carbon form, being an opportunity for future mitigation strategies.Keywords: greenhouse gas, mitigation strategies, soil carbon stock, carbon dioxide, agriculture. Uma revisão sobre o acúmulo de carbono no solo devido a mudança de manejo nas principais atividades agrícolas do Brasil ResumoÁreas agrícolas trocam enormes fluxos de CO 2 , oferecendo uma oportunidade para mitigar o efeito estufa. Neste trabalho, estudou-se o potencial de sequestro de carbono em razão da conversão no manejo das principais atividades agrícolas do Brasil. Dados de vários estudos têm indicado que no sistema soja/milho e nas respectivas rotações, ocorre um sequestro de carbono no solo significativo ao longo dos anos de conversão do plantio convencional para o plantio direto, com uma média de 0,41 Mg C ha -1 ano -1. O mesmo efeito tem sido observado nos canaviais, porém há maiores acúmulos de carbono no solo quando as áreas de cana-de-açúcar são convertidas da colheita baseada na queima para a mecanizada, em que grandes quantidades de palha são deixadas na superfície do solo (1,8 Mg C ha -1 ano -1). Esse maior potencial de acúmulo de carbono no solo nos canaviais, comparado com outras culturas, está diretamente relacionado com a maior produção primária dessa cultura. Apesar disso, muito desse potencial de sequestro é perdido, uma vez que os canaviais são reformados, sob preparo intensivo do solo. As áreas de pasto mostram uma depleção nos estoques de carbono, quando convertidas de áreas naturais; porém, a integração dessas áreas com agricultura pode promover o aumento nos estoques de carbono do solo. Os trabalhos têm mostrado que as princi...

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“…Além disto, a macaúba tem sido referenciada como espécie pioneira comum em áreas que sofreram intervenção antrópica recente, sobretudo aquelas sob pastagens (Motta et al, 2002). Esta associação pode ser importante para manutenção e melhoria da qualidade do solo uma vez que a presença de espécies arbóreas e de maior biodiversidade contribui significativamente para redução da perda de nutrientes, para o aumento do estoque de matéria orgânica do solo e para mitigação das emissões de gases de efeito estufa promovendo a sustentabilidade dos sistemas produtivos (Carvalho et al, 2010).…”

Section: Introductionunclassified

Qualidade química do solo e dinâmica de carbono sob monocultivo e consórcio de macaúba e pastagem

Leite

Arruda

Costa³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONeste trabalho objetivou-se avaliar o efeito do monocultivo e do consórcio de macaúba e pastagem sobre a qualidade química e os compartimentos de carbono em Latossolo Vermelho-Amarelo no Cerrado Maranhense. Foram estudados quatro sistemas de uso do solo: macaúba, pastagem, macaúba consorciada com pastagem e vegetação nativa de cerrado. Nesses sistemas foram coletadas amostras de solo da superfície até 60 cm, para determinação dos atributos químicos e dos teores e estoques de carbono orgânico do solo. Os maiores valores de P, K, Ca e Mg foram observados nas áreas sob pastagem. Os estoques de carbono orgânico total e os teores de carbono lábil foram maiores no solo com vegetação nativa até 60 cm de profundidade, seguida pelo sistema macaúba associada com pastagem. Maiores valores de carbono da biomassa microbiana e de quociente microbiano foram observados no solo sob pastagem em todas as camadas. A presença da pastagem é importante no consórcio com macaubeiras pois aumenta os níveis de fertilidade do solo e os estoques de carbono favorecendo a melhoria da qualidade do solo nas condições do cerrado maranhense. Palavras-chave: cerrado, oleaginosas, agrofloresta, fertilidade do solo, matéria orgânica do soloChemical quality of soil and dynamics of carbon under monoculture and intercroping of acrocomia palm and pasture ABSTRACT This study aimed to evaluate the effects of the cultivation of acrocomia palm (Acrocomia aculeata) intercropped or not with pasture on the chemical quality and carbon pools of an Oxisol of the Savanna of Maranhão state. Four land use systems were studied: acrocomia, pasture, acrocomia intercropped with pasture and savanna native vegetation. Soil samples were collected up to 60 cm depth for determination of chemical attributes and soil organic carbon contents and stocks. The highest values of P, K, Ca and Mg were observed in the soil under pasture. Total organic carbon stocks and labile carbon content were higher under native vegetation up to 60 cm followed by acrocomia intercropped with pasture system. Higher values of microbial biomass carbon and microbial quotient were verified in the soil under pasture in all depths. Pasture is important to be intercropped with acrocomia since it increases the soil fertility levels and soil carbon stocks favoring the improvement of the soil quality in the Savanna of Maranhão state.

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Potencial de sequestro de carbono em diferentes biomas do Brasil

Cited by 125 publications

References 40 publications

<b>Adsorption of P and forms of iron in no-tillage areas in the ‘Cerrado’ biome

<b>Adsorption of P and forms of iron in no-tillage areas in the ‘Cerrado’ biome

A review on soil carbon accumulation due to the management change of major Brazilian agricultural activities

Qualidade química do solo e dinâmica de carbono sob monocultivo e consórcio de macaúba e pastagem

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