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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
31/03/2014 |
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Data da última atualização: |
14/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CHALK, P. M.; MAGALHÃES, A. M. T.; INACIO, C. de T. |
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Afiliação: |
PHILLIP M. CHALK; ALBERTO M. T. MAGALHÃES; CAIO DE TEVES INACIO, CNPS. |
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Título: |
Towards an understanding of the dynamics of compost N in the soil-plant-atmosphere system using 15N tracer. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Plant and Soil, v. 362, n. 1/2, p. 373-388, Jan. 2013. |
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DOI: |
https://doi.org/10.1007/s11104-012-1358-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Aims The principal aim of the present review is to synthesize and evaluate published information on the N fertilizer value of composts, and their effect on the utilization of conventional N fertilizers by crops. Methods We have examined the literature where the dynamics of N in the soil-plant-atmosphere continuum are traced using composts that were either artificially enriched in the 15N stable isotope (in units of atom % 15N excess) or had a natural 15N abundance (δ15N in units of ? or per mil) due to isotope discrimination processes that occur during composting. The methods used to produce artificially-enriched composts and to test uniformity of labelling are reviewed. Results Limited data show that composts are generally inferior sources of N for crops compared with their raw materials due to a lower N mineralization capacity. Immobilization of fertilizer N increases in compostamended soils and may reduce recovery by a crop, but fertilizer N losses are reduced overall. However, coapplication of compost and urea should be avoided due to the risk of increased NH3 volatilization due to the action of compost-derived urease. High annual rates of compost application can exacerbate environmental problems including nitrate contamination of groundwater. Conclusions Efforts are required to improve the N fertilizer value of composts by minimizing NH3 volatilization losses during composting. More attention should also be given to the use of the natural 15N abundance of compost as a tracer. MenosAims The principal aim of the present review is to synthesize and evaluate published information on the N fertilizer value of composts, and their effect on the utilization of conventional N fertilizers by crops. Methods We have examined the literature where the dynamics of N in the soil-plant-atmosphere continuum are traced using composts that were either artificially enriched in the 15N stable isotope (in units of atom % 15N excess) or had a natural 15N abundance (δ15N in units of ? or per mil) due to isotope discrimination processes that occur during composting. The methods used to produce artificially-enriched composts and to test uniformity of labelling are reviewed. Results Limited data show that composts are generally inferior sources of N for crops compared with their raw materials due to a lower N mineralization capacity. Immobilization of fertilizer N increases in compostamended soils and may reduce recovery by a crop, but fertilizer N losses are reduced overall. However, coapplication of compost and urea should be avoided due to the risk of increased NH3 volatilization due to the action of compost-derived urease. High annual rates of compost application can exacerbate environmental problems including nitrate contamination of groundwater. Conclusions Efforts are required to improve the N fertilizer value of composts by minimizing NH3 volatilization losses during composting. More attention should also be given to the use of the natural 15N abundance of compost a... Mostrar Tudo |
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Palavras-Chave: |
15N; Compost; N fertilizers; N immobilization; N mineralization. |
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Thesaurus Nal: |
nitrogen. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
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008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11104-012-1358-5$2DOI
100 1 $aCHALK, P. M.
245 $aTowards an understanding of the dynamics of compost N in the soil-plant-atmosphere system using 15N tracer.$h[electronic resource]
260 $c2013
520 $aAims The principal aim of the present review is to synthesize and evaluate published information on the N fertilizer value of composts, and their effect on the utilization of conventional N fertilizers by crops. Methods We have examined the literature where the dynamics of N in the soil-plant-atmosphere continuum are traced using composts that were either artificially enriched in the 15N stable isotope (in units of atom % 15N excess) or had a natural 15N abundance (δ15N in units of ? or per mil) due to isotope discrimination processes that occur during composting. The methods used to produce artificially-enriched composts and to test uniformity of labelling are reviewed. Results Limited data show that composts are generally inferior sources of N for crops compared with their raw materials due to a lower N mineralization capacity. Immobilization of fertilizer N increases in compostamended soils and may reduce recovery by a crop, but fertilizer N losses are reduced overall. However, coapplication of compost and urea should be avoided due to the risk of increased NH3 volatilization due to the action of compost-derived urease. High annual rates of compost application can exacerbate environmental problems including nitrate contamination of groundwater. Conclusions Efforts are required to improve the N fertilizer value of composts by minimizing NH3 volatilization losses during composting. More attention should also be given to the use of the natural 15N abundance of compost as a tracer.
650 $anitrogen
653 $a15N
653 $aCompost
653 $aN fertilizers
653 $aN immobilization
653 $aN mineralization
700 1 $aMAGALHÃES, A. M. T.
700 1 $aINACIO, C. de T.
773 $tPlant and Soil$gv. 362, n. 1/2, p. 373-388, Jan. 2013.
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Registro original: |
Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
26/04/2010 |
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Data da última atualização: |
03/05/2024 |
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Tipo da produção científica: |
Circular Técnica |
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Autoria: |
SILVA, J. G. da; SILVA, M. R. L. e; OLVEIRA, A. C. de; MORAES, M. C. B.; LIMA, L. H. C.; SOUZA, J. R. de; VAZ, C. M. P.; CASTRO, C. S. P. de. |
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Afiliação: |
JONATAS GOMES DA SILVA; MARIANA RODRIGUES LOPES E SILVA; ALINE CARLOS DE OLIVEIRA; MARIA CAROLINA BLASSIOLI MORAES, CENARGEN; LUZIA HELENA CORREA LIMA, CENARGEN; JURANDIR RODRIGUES DE SOUZA; CARLOS MANOEL PEDRO VAZ, CNPDIA; CLARISSA SILVA PIRES DE CASTRO, CENARGEN. |
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Título: |
Desenvolvimento de metodologia analítica para a determinação de genisteína utilizando eletrodo de carbono vítreo. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Brasília: Embrapa Recursos Genéticos e Biotecnologia, 2009. 13 p. (Embrapa Recursos Genéticos e Biotecnologia. Circular Técnica, 87). |
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Páginas: |
8 p. |
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Idioma: |
Português |
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Palavras-Chave: |
Metodologia analítica. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/121813/1/cit087.pdf
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Marc: |
LEADER 00762nam a2200205 a 4500
001 1711905
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008 2009 bl uuuu u0uu1 u #d
100 1 $aSILVA, J. G. da
245 $aDesenvolvimento de metodologia analítica para a determinação de genisteína utilizando eletrodo de carbono vítreo.$h[electronic resource]
260 $aBrasília: Embrapa Recursos Genéticos e Biotecnologia, 2009. 13 p. (Embrapa Recursos Genéticos e Biotecnologia. Circular Técnica, 87).$c2009
300 $a8 p.
653 $aMetodologia analítica
700 1 $aSILVA, M. R. L. e
700 1 $aOLVEIRA, A. C. de
700 1 $aMORAES, M. C. B.
700 1 $aLIMA, L. H. C.
700 1 $aSOUZA, J. R. de
700 1 $aVAZ, C. M. P.
700 1 $aCASTRO, C. S. P. de
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