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Registro Completo |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
17/10/2005 |
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Data da última atualização: |
17/07/2008 |
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Autoria: |
VIEIRA, T. M.; SANTOS, J. P. dos; GUIMARÃES, P. M.; MARQUES, A. S. dos A. |
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Título: |
Níveis populacionais de Xanthomonas axonopodis pv. phaseoli em sementes de feijão após cinco anos de armazenamento. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 6., 2001, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2001. |
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Páginas: |
p. 77. |
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Idioma: |
Português |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CENARGEN/25657/1/tales2001.pdf
https://www.cenargen.embrapa.br/publica/talento/tales2001.pdf
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Marc: |
LEADER 00635nam a2200145 a 4500
001 1186163
005 2008-07-17
008 2001 bl uuuu u00u1 u #d
100 1 $aVIEIRA, T. M.
245 $aNíveis populacionais de Xanthomonas axonopodis pv. phaseoli em sementes de feijão após cinco anos de armazenamento.
260 $aIn: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 6., 2001, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia$c2001
300 $ap. 77.
700 1 $aSANTOS, J. P. dos
700 1 $aGUIMARÃES, P. M.
700 1 $aMARQUES, A. S. dos A.
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Registro original: |
Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Pesca e Aquicultura. |
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Data corrente: |
25/02/2016 |
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Data da última atualização: |
07/03/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
GROPPO, J. D.; LINS, S. R. M.; CAMARGO, P. B.; ASSAD, E. D.; PINTO, H. S.; MARTINS, S. C.; SALGADO, P. R.; EVANGELISTA, B.; VASCONCELLOS, E.; SANO, E. E.; PAVÃO, E.; LUNA, R.; MARTINELLI, L. A. |
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Afiliação: |
CNPTIA; Cena/USP; Cena/USP; EDUARDO DELGADO ASSAD, CNPTIA; Unicamp; FGV; PAULA RODRIGUES SALGADO, SAPC; CPAC; CNPTIA; EDSON EYJI SANO, CPAC; CNPTIA; CNPTIA; Cena/USP. |
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Título: |
Changes in soil carbon, nitrogen, and phosphorus due to land-use changes in Brazil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Biogeosciences, v. 12, n. 15, p. 4765-4780, 2015. |
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DOI: |
10.5194/bg-12-4765-2015 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract. In this paper, soil carbon, nitrogen and phosphorus concentrations and stocks were investigated in agricultural and natural areas in 17 plot-level paired sites and in a regional survey encompassing more than 100 pasture soils In the paired sites, elemental soil concentrations and stocks were determined in native vegetation (forests and savannas), pastures and crop-livestock systems (CPSs). Nutrient stocks were calculated for the soil depth intervals 0-10, 0-30, and 0-60 cm for the paired sites and 0-10, and 0-30 cm for the pasture regional survey by sum stocks obtained in each sampling intervals (0-5, 5-10, 10-20, 20-30, 30-40, 40-60 cm). Overall, there were significant differences in soil element concentrations and ratios between different land uses, especially in the surface soil layers. Carbon and nitrogen contents were lower, while phosphorus contents were higher in the pasture and CPS soils than in native vegetation soils. Additionally, soil stoichiometry has changed with changes in land use. The soil C :N ratio was lower in the native vegetation than in the pasture and CPS soils, and the carbon and nitrogen to available phosphorus ratio (PME/ decreased from the native vegetation to the pasture to the CPS soils. In the plotlevel paired sites, the soil nitrogen stocks were lower in all depth intervals in pasture and in the CPS soils when compared with the native vegetation soils. On the other hand, the soil phosphorus stocks were higher in all depth intervals in agricultural soils when compared with the native vegetation soils. For the regional pasture survey, soil nitrogen and phosphorus stocks were lower in all soil intervals in pasture soils than in native vegetation soils. The nitrogen loss with cultivation observed here is in line with other studies and it seems to be a combination of decreasing organic matter inputs, in cases where crops replaced native forests, with an increase in soil organic matter decomposition that leads to a decrease in the long run. The main cause of the increase in soil phosphorus stocks in the CPS and pastures of the plot-level paired site seems to be linked to phosphorus fertilization by mineral and organics fertilizers. The findings of this paper illustrate that land-use changes that are currently common in Brazil alter soil concentrations, stocks and elemental ratios of carbon, nitrogen and phosphorus. These changes could have an impact on the subsequent vegetation, decreasing soil carbon and increasing nitrogen limitation but alleviating soil phosphorus deficiency. MenosAbstract. In this paper, soil carbon, nitrogen and phosphorus concentrations and stocks were investigated in agricultural and natural areas in 17 plot-level paired sites and in a regional survey encompassing more than 100 pasture soils In the paired sites, elemental soil concentrations and stocks were determined in native vegetation (forests and savannas), pastures and crop-livestock systems (CPSs). Nutrient stocks were calculated for the soil depth intervals 0-10, 0-30, and 0-60 cm for the paired sites and 0-10, and 0-30 cm for the pasture regional survey by sum stocks obtained in each sampling intervals (0-5, 5-10, 10-20, 20-30, 30-40, 40-60 cm). Overall, there were significant differences in soil element concentrations and ratios between different land uses, especially in the surface soil layers. Carbon and nitrogen contents were lower, while phosphorus contents were higher in the pasture and CPS soils than in native vegetation soils. Additionally, soil stoichiometry has changed with changes in land use. The soil C :N ratio was lower in the native vegetation than in the pasture and CPS soils, and the carbon and nitrogen to available phosphorus ratio (PME/ decreased from the native vegetation to the pasture to the CPS soils. In the plotlevel paired sites, the soil nitrogen stocks were lower in all depth intervals in pasture and in the CPS soils when compared with the native vegetation soils. On the other hand, the soil phosphorus stocks were higher in all depth intervals i... Mostrar Tudo |
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Palavras-Chave: |
Concentração de carbono; Concentração de fósforo; Concentração de nitrogênio; Estequiometria; Estoque de carbono; Estoque de fósforo; Estoque de nitrogênio; Nutrientes no solo. |
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Thesagro: |
Agricultura; Solo. |
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Thesaurus NAL: |
Agriculture; Carbon sinks; Nitrogen content; Soil; Soil nutrient balance; Stoichiometry. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/140114/1/AP-Changes-Groppo.pdf
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Marc: |
LEADER 03879naa a2200469 a 4500
001 2038618
005 2016-03-07
008 2015 bl uuuu u00u1 u #d
024 7 $a10.5194/bg-12-4765-2015$2DOI
100 1 $aGROPPO, J. D.
245 $aChanges in soil carbon, nitrogen, and phosphorus due to land-use changes in Brazil.$h[electronic resource]
260 $c2015
520 $aAbstract. In this paper, soil carbon, nitrogen and phosphorus concentrations and stocks were investigated in agricultural and natural areas in 17 plot-level paired sites and in a regional survey encompassing more than 100 pasture soils In the paired sites, elemental soil concentrations and stocks were determined in native vegetation (forests and savannas), pastures and crop-livestock systems (CPSs). Nutrient stocks were calculated for the soil depth intervals 0-10, 0-30, and 0-60 cm for the paired sites and 0-10, and 0-30 cm for the pasture regional survey by sum stocks obtained in each sampling intervals (0-5, 5-10, 10-20, 20-30, 30-40, 40-60 cm). Overall, there were significant differences in soil element concentrations and ratios between different land uses, especially in the surface soil layers. Carbon and nitrogen contents were lower, while phosphorus contents were higher in the pasture and CPS soils than in native vegetation soils. Additionally, soil stoichiometry has changed with changes in land use. The soil C :N ratio was lower in the native vegetation than in the pasture and CPS soils, and the carbon and nitrogen to available phosphorus ratio (PME/ decreased from the native vegetation to the pasture to the CPS soils. In the plotlevel paired sites, the soil nitrogen stocks were lower in all depth intervals in pasture and in the CPS soils when compared with the native vegetation soils. On the other hand, the soil phosphorus stocks were higher in all depth intervals in agricultural soils when compared with the native vegetation soils. For the regional pasture survey, soil nitrogen and phosphorus stocks were lower in all soil intervals in pasture soils than in native vegetation soils. The nitrogen loss with cultivation observed here is in line with other studies and it seems to be a combination of decreasing organic matter inputs, in cases where crops replaced native forests, with an increase in soil organic matter decomposition that leads to a decrease in the long run. The main cause of the increase in soil phosphorus stocks in the CPS and pastures of the plot-level paired site seems to be linked to phosphorus fertilization by mineral and organics fertilizers. The findings of this paper illustrate that land-use changes that are currently common in Brazil alter soil concentrations, stocks and elemental ratios of carbon, nitrogen and phosphorus. These changes could have an impact on the subsequent vegetation, decreasing soil carbon and increasing nitrogen limitation but alleviating soil phosphorus deficiency.
650 $aAgriculture
650 $aCarbon sinks
650 $aNitrogen content
650 $aSoil
650 $aSoil nutrient balance
650 $aStoichiometry
650 $aAgricultura
650 $aSolo
653 $aConcentração de carbono
653 $aConcentração de fósforo
653 $aConcentração de nitrogênio
653 $aEstequiometria
653 $aEstoque de carbono
653 $aEstoque de fósforo
653 $aEstoque de nitrogênio
653 $aNutrientes no solo
700 1 $aLINS, S. R. M.
700 1 $aCAMARGO, P. B.
700 1 $aASSAD, E. D.
700 1 $aPINTO, H. S.
700 1 $aMARTINS, S. C.
700 1 $aSALGADO, P. R.
700 1 $aEVANGELISTA, B.
700 1 $aVASCONCELLOS, E.
700 1 $aSANO, E. E.
700 1 $aPAVÃO, E.
700 1 $aLUNA, R.
700 1 $aMARTINELLI, L. A.
773 $tBiogeosciences$gv. 12, n. 15, p. 4765-4780, 2015.
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