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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
09/03/2022 |
Data da última atualização: |
09/03/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
RAMALHO, B.; DIECKOW, J.; MELO, V. de F.; BROWN, G. G.; SIMON, P. L.; IBARR, M. A.; CUNHA, L.; KILLE, P.; TPI NETWORK. |
Afiliação: |
BRUNA RAMALHO, UFPR; JEFERSON DIECKOW, UFPR; VANDER DE FREITAS MELO, UFPR; GEORGE GARDNER BROWN, CNPF; PRISCILA LUZIA SIMON, UFPR; MARIANA ALVES IBARR, UFPR; LUIS CUNHA, University of Coimbra; PETER KILLE, Cardiff University; TPI NETWORK, Cardiff University. |
Título: |
Carbon and nitrogen storage and stability by mineral-organic association in physical fractions of anthropogenic dark earth and of reference soils in Amazonia. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Catena, v. 213, 106185, June 2022. 10 p. |
DOI: |
https://doi.org/10.1016/j.catena.2022.106185 |
Idioma: |
Inglês |
Conteúdo: |
The anthropogenic dark earths (ADEs) are being assumed in recent years as a model representing the result of sustainable soil management practices carried out by Pre-Columbian peoples. However, little is known about the role of mineral-organic associations in organic matter storage in those soils compared to the emphasis generally given to the role of pyrogenic structures. We quantified the changes of carbon and nitrogen and their distribution in physical fractions of ADEs in relation to the reference (adjacent) soil. Four ADEs sites having the different soil textural classes of sandy clay loam, sandy clay, clayey, and very clayey were selected in the Amazon region of Brazil. Soil samples were collected from the 0?10 cm layer and a subset of the sample was separated into large aggregates (>500 micrômetro) and small aggregates (<500 micrômetro). The ADEs stored on average 45% more total organic carbon (TOC) and 44% more total nitrogen (TN) than the reference soils. Of the incremental TOC and TN in ADE relative to the reference soil, the silt size fraction stored on average 92% of this TOC and 37% of this TN and had C:N ratios as high as 25, which may indicate the presence of pyrogenic material. The clay fraction stored a substantial share of 27-46% of the incremental TOC and 27-66% of the incremental TN. The C:N ratio in the clay size fraction of ADEs, on average 10.5, was lower or not different than in the clay fraction of reference soil (average of 11.1), indicating that the organic matter in the clay fraction even of ADEs was predominantly of microbial origin, and not pyrogenic. We therefore conclude that the clay fraction proved to be an important location to the accumulation and stabilization of TOC and TN in these Anthrosols, possibly by mineral-organic association mechanisms. MenosThe anthropogenic dark earths (ADEs) are being assumed in recent years as a model representing the result of sustainable soil management practices carried out by Pre-Columbian peoples. However, little is known about the role of mineral-organic associations in organic matter storage in those soils compared to the emphasis generally given to the role of pyrogenic structures. We quantified the changes of carbon and nitrogen and their distribution in physical fractions of ADEs in relation to the reference (adjacent) soil. Four ADEs sites having the different soil textural classes of sandy clay loam, sandy clay, clayey, and very clayey were selected in the Amazon region of Brazil. Soil samples were collected from the 0?10 cm layer and a subset of the sample was separated into large aggregates (>500 micrômetro) and small aggregates (<500 micrômetro). The ADEs stored on average 45% more total organic carbon (TOC) and 44% more total nitrogen (TN) than the reference soils. Of the incremental TOC and TN in ADE relative to the reference soil, the silt size fraction stored on average 92% of this TOC and 37% of this TN and had C:N ratios as high as 25, which may indicate the presence of pyrogenic material. The clay fraction stored a substantial share of 27-46% of the incremental TOC and 27-66% of the incremental TN. The C:N ratio in the clay size fraction of ADEs, on average 10.5, was lower or not different than in the clay fraction of reference soil (average of 11.1), indicating that th... Mostrar Tudo |
Palavras-Chave: |
Physical fractionation; Protection mechanisms. |
Thesaurus Nal: |
Anthrosols; Clay fraction; Organic matter. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02718naa a2200289 a 4500 001 2140681 005 2022-03-09 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.catena.2022.106185$2DOI 100 1 $aRAMALHO, B. 245 $aCarbon and nitrogen storage and stability by mineral-organic association in physical fractions of anthropogenic dark earth and of reference soils in Amazonia.$h[electronic resource] 260 $c2022 520 $aThe anthropogenic dark earths (ADEs) are being assumed in recent years as a model representing the result of sustainable soil management practices carried out by Pre-Columbian peoples. However, little is known about the role of mineral-organic associations in organic matter storage in those soils compared to the emphasis generally given to the role of pyrogenic structures. We quantified the changes of carbon and nitrogen and their distribution in physical fractions of ADEs in relation to the reference (adjacent) soil. Four ADEs sites having the different soil textural classes of sandy clay loam, sandy clay, clayey, and very clayey were selected in the Amazon region of Brazil. Soil samples were collected from the 0?10 cm layer and a subset of the sample was separated into large aggregates (>500 micrômetro) and small aggregates (<500 micrômetro). The ADEs stored on average 45% more total organic carbon (TOC) and 44% more total nitrogen (TN) than the reference soils. Of the incremental TOC and TN in ADE relative to the reference soil, the silt size fraction stored on average 92% of this TOC and 37% of this TN and had C:N ratios as high as 25, which may indicate the presence of pyrogenic material. The clay fraction stored a substantial share of 27-46% of the incremental TOC and 27-66% of the incremental TN. The C:N ratio in the clay size fraction of ADEs, on average 10.5, was lower or not different than in the clay fraction of reference soil (average of 11.1), indicating that the organic matter in the clay fraction even of ADEs was predominantly of microbial origin, and not pyrogenic. We therefore conclude that the clay fraction proved to be an important location to the accumulation and stabilization of TOC and TN in these Anthrosols, possibly by mineral-organic association mechanisms. 650 $aAnthrosols 650 $aClay fraction 650 $aOrganic matter 653 $aPhysical fractionation 653 $aProtection mechanisms 700 1 $aDIECKOW, J. 700 1 $aMELO, V. de F. 700 1 $aBROWN, G. G. 700 1 $aSIMON, P. L. 700 1 $aIBARR, M. A. 700 1 $aCUNHA, L. 700 1 $aKILLE, P. 700 1 $aTPI NETWORK 773 $tCatena$gv. 213, 106185, June 2022. 10 p.
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Embrapa Florestas (CNPF) |
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Registro Completo
Biblioteca(s): |
Embrapa Agricultura Digital. |
Data corrente: |
26/01/2011 |
Data da última atualização: |
13/04/2011 |
Tipo da produção científica: |
Software |
Autoria: |
LIMA, H. P. de; MASSRUHÁ, S. M. F. S. |
Afiliação: |
HELANO PÓVOAS DE LIMA, CNPTIA; SILVIA MARIA FONSECA SILVEIRA MASSRUHÁ, CNPTIA. |
Título: |
FPS - Fazenda Pantaneira Sustentável. Versão 1.1. |
Ano de publicação: |
2010 |
Fonte/Imprenta: |
Campinas: Embrapa Informática Agropecuária, 2010. |
Descrição Física: |
1 CD-ROM. |
Idioma: |
Português |
Conteúdo: |
FPS é um sistema baseado no uso da lógica fuzzy para o cálculo do índice de sustentabilidade das fazendas do Pantanal. O sistema é formado por um conjunto de modelos, um para cada dimensão do índice, que unidos, formam o índice geral. Os modelos foram codificados no formato padrão da IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION) para sistemas de inferência fuzzy, à saber, FCL (Fuzzy Control Language), e precisam de um ambiente de inferência como o MathLab®, FuzzyGen ou WebFuzzy, sendo os dois últimos gerados também no LabIC. |
Palavras-Chave: |
Lógica fuzzy; Modelos; Sistemas de inferência fuzzy; Software. |
Thesaurus NAL: |
Fuzzy logic; Models. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 01093nam a2200205 a 4500 001 1874544 005 2011-04-13 008 2010 bl uuuu u0uu1 u #d 100 1 $aLIMA, H. P. de 245 $aFPS - Fazenda Pantaneira Sustentável. Versão 1.1. 260 $aCampinas: Embrapa Informática Agropecuária$c2010 300 $c1 CD-ROM. 520 $aFPS é um sistema baseado no uso da lógica fuzzy para o cálculo do índice de sustentabilidade das fazendas do Pantanal. O sistema é formado por um conjunto de modelos, um para cada dimensão do índice, que unidos, formam o índice geral. Os modelos foram codificados no formato padrão da IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION) para sistemas de inferência fuzzy, à saber, FCL (Fuzzy Control Language), e precisam de um ambiente de inferência como o MathLab®, FuzzyGen ou WebFuzzy, sendo os dois últimos gerados também no LabIC. 650 $aFuzzy logic 650 $aModels 653 $aLógica fuzzy 653 $aModelos 653 $aSistemas de inferência fuzzy 653 $aSoftware 700 1 $aMASSRUHÁ, S. M. F. S.
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