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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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 Pantanal. |
Data corrente: |
11/08/1995 |
Data da última atualização: |
30/03/2015 |
Tipo da produção científica: |
Circular Técnica |
Autoria: |
POTT, E. B. |
Afiliação: |
EMBRAPA. Unidade de Execucao de Pesquisa de Ambito Estadual de Corumba (Corumba, MS). |
Título: |
Coeficiente de digestibilidade in vitro e teores de proteina bruta, calcio e fosforo da grama-tio-pedro (Paspalum oteroi) no Pantanal Mato-Grossense. |
Ano de publicação: |
1982 |
Fonte/Imprenta: |
Corumba: EMBRAPA-UEPAE Corumba, 1982. |
Páginas: |
32p.il. |
Série: |
(EMBRAPA-UEPAE Corumba. Circular Tecnica, 12) |
Idioma: |
Português |
Conteúdo: |
A grama tio-pedro (Paspalum oteroi Swallen), submetida a intervalos entre cortes de 28, 56, 84 e 112 dias, apresentou, respectivamente, coeficientes de digestibilidade in vitro de 57,21%, 48,37%, 47,66% e 49,88%; teor de proteina bruta de 8,26%, 7,12%, 6,00% e 5,44%; teor de calcio de 0,50%, 0,56%, 0,58% e 0,35%; e teor de fosforo de 0,15%, 0,13%, 0,20% e 0,14%. |
Palavras-Chave: |
Analysis; Forrageira nativa; Grama Tio Pedro; Grama-tio-pedro; Mato Grosso; Mato Grosso do Sul; Minerais; Native forage; Paspalum oteroi; Pasture; Plant; Planta forrageira nativa; Planta gramínea; Região tropical. |
Thesagro: |
Análise; Cálcio; Digestibilidade; Digestibilidade In Vitro; Fósforo; Gramínea; Pastagem; Planta; Proteína; Proteína Bruta; Valor Nutritivo. |
Thesaurus NAL: |
grasses; in vitro digestibility; minerals; Pantanal. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/37656/1/CT12.pdf
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Marc: |
LEADER 01686nam a2200481 a 4500 001 1787710 005 2015-03-30 008 1982 bl uuuu u0uu1 u #d 100 1 $aPOTT, E. B. 245 $aCoeficiente de digestibilidade in vitro e teores de proteina bruta, calcio e fosforo da grama-tio-pedro (Paspalum oteroi) no Pantanal Mato-Grossense. 260 $aCorumba: EMBRAPA-UEPAE Corumba$c1982 300 $a32p.il. 490 $a(EMBRAPA-UEPAE Corumba. Circular Tecnica, 12) 520 $aA grama tio-pedro (Paspalum oteroi Swallen), submetida a intervalos entre cortes de 28, 56, 84 e 112 dias, apresentou, respectivamente, coeficientes de digestibilidade in vitro de 57,21%, 48,37%, 47,66% e 49,88%; teor de proteina bruta de 8,26%, 7,12%, 6,00% e 5,44%; teor de calcio de 0,50%, 0,56%, 0,58% e 0,35%; e teor de fosforo de 0,15%, 0,13%, 0,20% e 0,14%. 650 $agrasses 650 $ain vitro digestibility 650 $aminerals 650 $aPantanal 650 $aAnálise 650 $aCálcio 650 $aDigestibilidade 650 $aDigestibilidade In Vitro 650 $aFósforo 650 $aGramínea 650 $aPastagem 650 $aPlanta 650 $aProteína 650 $aProteína Bruta 650 $aValor Nutritivo 653 $aAnalysis 653 $aForrageira nativa 653 $aGrama Tio Pedro 653 $aGrama-tio-pedro 653 $aMato Grosso 653 $aMato Grosso do Sul 653 $aMinerais 653 $aNative forage 653 $aPaspalum oteroi 653 $aPasture 653 $aPlant 653 $aPlanta forrageira nativa 653 $aPlanta gramínea 653 $aRegião tropical
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