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Carbono orgânico e agregação de um Latossolo Vermelho com colheita mecanizada de cana-de-açúcar. Repositório Alice
SOUZA, H. A. de; MARCELO, A. V.; CENTURION, J. F..
RESUMO - O uso intensivo dos solos com o cultivo da cana-de-açúcar modifica significativamente as propriedades físicas do solo. Assim, objetivou-se avaliar o efeito do manejo da cana-de-açúcar com colheita mecanizada sobre a agregação de um Latossolo Vermelho distrófico típico de textura argilosa, situado em Guariba (SP). Foram selecionadas quatro situações (ciclos) com manejo de cana-de-açúcar colhida mecanicamente sem prévia queima: cana-planta e cana-soca de primeiro, segundo e terceiro cortes. Nas camadas de 0-0,10; 0,10-0,20 e 0,20-0,30 m de profundidade foram avaliados: diâmetro médio ponderado dos agregados (DMP), teores e estoques de carbono orgânico do solo. O manejo da cana-de-açúcar com colheita mecanizada influencia o DMP do solo, cujos valores...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Estoque de carbono; DMP; Atributos físicos; Saccharum officinarum; Cana-de-açúcar; Saccharum officinarum; WMD; Carbon stock; Physical attributes.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/927276
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ECONOMICS OF SEQUESTERING CARBON IN THE U.S. AGRICULTURAL SECTOR AgEcon
Lewandrowski, Jan; Peters, Mark; Jones, Carol Adaire; House, Robert M.; Sperow, Mark; Eve, Marlen; Paustian, Keith H..
Atmospheric concentrations of greenhouse gases can be reduced by withdrawing carbon from the atmosphere and sequestering it in soils and biomass. This report analyzes the performance of alternative incentive designs and payment levels if farmers were paid to adopt land uses and management practices that raise soil carbon levels. At payment levels below $10 per metric ton for permanently sequestered carbon, analysis suggests landowners would find it more cost effective to adopt changes in rotations and tillage practices. At higher payment levels, afforestation dominates sequestration activities, mostly through conversion of pastureland. Across payment levels, the economic potential to sequester carbon is much lower than the technical potential reported in...
Tipo: Report Palavras-chave: Carbon sequestration; Greenhouse gas mitigation; Afforestation; Conservation tillage; No-till; Incentive design; Leakage; Carbon stock; Permanence; Environmental Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/33569
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Effects of grazing on plant species diversity and carbon partitioning in semiarid rangelands of northeastern China Phyton
Hu,FL; Liu,B; Liu,ZM; Fang,YT; Busso,CA.
Grasslands are one of the most widespread landscapes worldwide, covering approximately one-fifth of the world's land surface, where grazing is a common practice. How carbon storage responds to grazing in steppes remains poorly understood. We quantified the effects of grazing on community composition and species diversity, and carbon storage in two typical grasslands of northeastern China, one in Horqin and the other one in Hulunbeier. In both grasslands, grazing did not infuence plant species diversity. However, it substantially decreased aboveground carbon by 31% and 54% in Horqin and Hulunbeier, respectively. Fenced and grazing treatments showed a similar belowground carbon at both locations. The predominant carbon pool in the study grassland ecosystem...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Species diversity; Carbon allocation; Carbon stock; Optimal partitioning; Community heterogeneity; Soil depth.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100028
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Long-Term Effect of Soil Use and Management on Organic Carbon and Aggregate Stability Rev. Bras. Ciênc. Solo
Wolschick,Neuro Hilton; Barbosa,Fabrício Tondello; Bertol,Ildegardis; Bagio,Bárbara; Kaufmann,Danieli Schneiders.
ABSTRACT: The conversion of native grassland into farmland causes changes in the soil. Tillage has profound effects on soil organic matter. The intensification of soil tillage decreases soil quality by reducing aggregate stability. Soil aggregate stability and soil organic matter are key indicators for soil quality and environmental sustainability in agro-ecosystems. The aim of the present study is to evaluate the total organic carbon content and the physical and chemical fractions of the organic matter in a soil under different uses and types of management over 27 years. Four soil tillage treatments with two annual crops were evaluated (no-tillage, NT; rotating tillage, RT; minimum tillage, MT; and conventional tillage, CT), as well as bare soil (BS)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Equivalent mass; Carbon stock; Humic substance; Aggregate classes.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100529
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Organic matter of tropical soil with coffee growth in CO2 enriched atmosphere. Repositório Alice
RIBEIRINHO, V. S.; CARVALHO, C. S.; RAMOS, N. P.; PACKER, A. P.; MILORI, D. M. B. P.; SANTOS, J. de O.; CERRI, C. E. P.; ANDRADE, C. A. de.
The increase of atmospheric CO2 should result in higher carbon fixation by plants of the C3 photosynthetic cycle, such as coffee. However, not much is known about the relationship between atmospheric CO2 increase, higher carbon fixation through photosynthesis and the potential carbon sequestration in soil. Based on the hypothesis that there will be greater stabilization of carbon in soil due to increase of atmospheric CO2 concentration, the study was carried a field coffee grown area with FACE (Free-Air Carbon dioxide Enrichment) system. The CO2 enrichment treatment maintained the concentration of this gas 200 ?mol mol-1 above the ambient value. The stocks of carbon and nitrogen in soil and some attributes related to the humification of organic matter were...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Carbon stock; Humification index; Café; Matéria Orgânica; Solo Tropical; Coffea arabica var. arabica; Humic substances; Free air carbon dioxide enrichment.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121331
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Prediction and digital mapping of soil carbon storage in the Lower Namoi Valley. Repositório Alice
MINASNY, B.; MCBRATENY, A. B.; MENDONÇA-SANTOS, M. L.; ODEH, I. O. A.; GUYON, B..
2006
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Soil information system; Neural networks; Carbon stock.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/887378
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Soil aggregation and carbon stabilization in burn and no-burn sugarcane management systems Anais da ABC (AABC)
GUIMARÃES,MARIA DE FÁTIMA; OLIVEIRA,JOSÉ F. DE; TELLES,TIAGO S.; MACHADO,WALQUÍRIA; BARBOSA,GRAZIELA M.C.; TAVARES FILHO,JOÃO.
ABSTRACT Retaining sugarcane straw over the soil after harvesting can improve soil structure and increase soil carbon stabilization, mainly in macroaggregates. We evaluated the carbon content in the aggregate classes in areas under burn and no-burn (adopted for five years) sugarcane management systems, focusing on the superficial layer (0.00-0.20 m). The experiment was carried in an Oxisol and the treatments consisted in burnt sugarcane, manual harvest; burnt sugarcane, mechanized harvest; and no-burn, mechanized harvest. The retention of sugarcane straw on the soil surface is justified by the increase in carbon content and carbon stock in the surface layer (0.00-0.20 m) by restructuring of the soil, even though it cannot match the structure of the soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sugarcane straw; Soil aggregates; Carbon stock; Sand fraction; Soil structure.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502459
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Soil attributes under different crop management systems in an Amazon Oxisols Bragantia
Lopes,Elessandra Laura Nogueira; Fernandes,Antonio Rodrigues; Teixeira,Renato Alves; Sousa,Edna Santos de; Ruivo,Maria de Lourdes Pinheiro.
AbstractSoil biological properties have a high potential for use in assessing the impacts of crop systems. The objective of this study is to evaluate the effects of cropping systems on the biological attributes of an oxisol in the Amazonian state of Pará. The treatments consisted of approximately 20-year-old secondary vegetation, recovered pasture, no-tillage systems (NT) maintained for 4 and 8 years after planting with corn (Zea mays L.) and soybean (Glycine max L.), and conventional tillage (CT) systems every 2 years after planting with rice (Oryza sativa L.) and soybean. The microbial biomass to nitrogen ratio was higher in the NT system (0.68 mg kg–1), and the NT system had greater microbial NT8. Thus, the contributions of organic matter from straw...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon stock; No-tillage; Oryza sativa; Glycine max; Zea mays; Amazon region.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000400428
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Soil carbon accumulation in cotton production systems in the Brazilian Cerrado. Repositório Alice
FERREIRA, A. C. de B.; BORIN, A. L. D. C.; LAMAS, F. M.; BOGIANI, J. C.; SILVA, M. A. S. da; SILVA FILHO, J. L. da; STAUT, L. A..
Sustainable production systems, such as the no-tillage system (NTS), have a tendency to increase organic carbon in the soil. However, in Brazilian cotton production, the conventional tillage system (CTS) is predominant, and long-term studies on cotton crop under the NTS are scarce. The present study aimed to evaluate the effect of soil management and crop rotation systems on the cotton fiber yield as well as on the carbon and nitrogen accumulation in the soil. This study was conducted in the Brazilian savanna over 9 years and consisted of the following four treatments with different soil management systems: the NTS and CTS with the succession or rotation of crops (cotton, soybean, maize, and Urochloa ruziziensis). The NTS increased the carbon content by...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Carbon stock; Gossypium Hirsutum; No-tillage; Conventional tillage; Nitrogen.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114633
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Soil carbon accumulation in cotton production systems in the Brazilian Cerrado Agronomy
Ferreira, Alexandre Cunha de Barcellos; Borin, Ana Luiza Dias Coelho; Lamas, Fernando Mendes; Bogiani, Julio Cesar; Silva, Mellissa Ananias Soler da; Silva Filho, Joao Luis da; Staut, Luiz Alberto.
Sustainable production systems, such as the no-tillage system (NTS), have a tendency to increase organic carbon in the soil. However, in Brazilian cotton production, the conventional tillage system (CTS) is predominant, and long-term studies on cotton crop under the NTS are scarce. The present study aimed to evaluate the effect of soil management and crop rotation systems on the cotton fiber yield as well as on the carbon and nitrogen accumulation in the soil. This study was conducted in the Brazilian savanna over 9 years and consisted of the following four treatments with different soil management systems: the NTS and CTS with the succession or rotation of crops (cotton, soybean, maize, and Urochloa ruziziensis). The NTS increased the carbon content by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirsutum; No-tillage; Conventional tillage; Nitrogen; Carbon stock; 5.01.01.06-4.
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/43039
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Soil carbon stock in archaeological black earth under different land use systems in the Brazilian Amazon. Repositório Alice
LÓPEZ-NORONHA, R.; SOUZA, Z. M. de; SOARES, M. D. R.; CAMPOS, M. C. C.; FARHATE, C. V. V.; OLIVEIRA, S. R. de M..
In the Amazon, there are soils associated with continued human occupation known as "archeological black earth" (ABE). Due to its physical and chemical properties, ABE is more productive than other typical soils in the same region. Therefore, its carbon (C) sequestration mechanism has been a major topic of discussion by the scientific community, aiming to replicate similar characteristics in other soils. Thus, the objective of this study was to develop a predictive model using feature selection and decision tree induction methods for predicting soil C stock in ABE under different land use scenarios. The experiment was carried out in agricultural (coffee, cacao, and beans), pasture, and forest areas. Four feature selection approaches were used to identify...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Estoque de carbono; Modelo preditivo; Classificação de solo; Carbon stock; Soil classification.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125072
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Soil organic carbon stocks under forest and pasture in the atlantic forest biome of Southeast Brazil. Repositório Alice
COELHO, M. R.; FONTANA, A.; MONTEIRO, J. M. G.; FONSECA, K. T.; COSTA, M. M..
2012
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Atlantic forest; Carbon stock; Land use change; Topossequence.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/944609
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Soil organic matter in fire-affected pastures and in an Araucaria forest in South-Brazilian leptosols. Repositório Alice
POTES, M. da L.; DICK, D. P.; SANTANA, G. S.; TOMAZI, M.; BAYER, C..
The objective of this work was to evaluate the distribution pattern and composition of soil organic matter (SOM) and its physical pools of Leptosols periodically affected by fire over the last 100 years in South Brazil. Soil samples at 0?5, 5?10, and 10?15 cm depths were collected from the following environments: native pasture without burning in the last year and grazed with 0.5 livestock per hectare per year (1NB); native pasture without burning in the last 23 years and grazed with 2.0 livestock per hectare per year (23NB); and an Araucaria forest (AF). Physical fractionation was performed with the 0?5 and 5?10 cm soil layers. Soil C and N stocks were determined in the three depths and in the physical pools, and organic matter was characterized by...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Physical pools; Carbon stock; Chemical composition; Chemical recalcitrance; Thermo-decomposition.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/930322
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Soil organic matter in fire-affected pastures and in an Araucaria forest in South-Brazilian Leptosols PAB
Potes,Mariana da Luz; Dick,Deborah Pinheiro; Santana,Graciele Sarante; Tomazi,Michely; Bayer,Cimélio.
The objective of this work was to evaluate the distribution pattern and composition of soil organic matter (SOM) and its physical pools of Leptosols periodically affected by fire over the last 100 years in South Brazil. Soil samples at 0-5, 5-10, and 10-15 cm depths were collected from the following environments: native pasture without burning in the last year and grazed with 0.5 livestock per hectare per year (1NB); native pasture without burning in the last 23 years and grazed with 2.0 livestock per hectare per year (23NB); and an Araucaria forest (AF). Physical fractionation was performed with the 0-5 and 5-10 cm soil layers. Soil C and N stocks were determined in the three depths and in the physical pools, and organic matter was characterized by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physical pools; Carbon stock; Chemical composition; Chemical recalcitrance; Thermo-decomposition.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500011
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