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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. |
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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Circulação/Nível: |
A - 1 |
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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: |
LEADER 02215naa a2200229 a 4500
001 1983675
005 2021-10-14
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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