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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 Agrobiologia; Embrapa Solos. |
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Data corrente: |
28/01/2016 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CHALK, P. M.; INACIO, C. T.; BALIEIRO, F. C.; ROUWS, J. R. C. |
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Afiliação: |
PHILLIP M. CHALK, UNIVERSITY OF MELBOURNE; CAIO DE TEVES INACIO, CNPS; FABIANO DE CARVALHO BALIEIRO, CNPS; JANAINA RIBEIRO COSTA ROUWS, CNPAB. |
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Título: |
Do techniques based on 15N enrichment and 15N natural abundance give consistent estimates of the symbiotic dependence of N2-fixing plants? |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Plant and Soil, v. 399, n. 1, p. 415-426, Feb. 2016. |
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DOI: |
https://doi.org/10.1007/s11104-015-2689-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Aims: The primary aim of this review is to determine if methods based on 15N enrichment (E) and 15N natural abundance (NA) give consistent estimates of the proportional dependence of N2-fixing species on biological N2 fixation (P atm), and secondly to attempt to explain any inconsistencies that may be found. Methods: Published estimates of the symbiotic dependence of N2-fixing plants based on E and NA techniques applied in the same experiment were compared across scales from glasshouse pots to field plots to landscapes in agricultural and forest ecosystems, which included grain legumes, pasture and forage legumes, and woody perennials. A meta-analysis of the published data was based on correlation coefficients, box-plots and confidence intervals of means. Results: In some studies, estimates were reference plant dependent for both E and NA techniques, indicating temporal and/or spatial variations in the natural and artificial distribution of 15N, which can sometimes result in erroneous negative estimates of symbiotic dependence. While significant correlations were obtained between E and NA estimates of P atm for each of the three groups of N2-fixing species, the probability that the methods provided estimates of P atm within ?5 to +5 % of each other was 0.29 or was 0.54 within ?10 to +10 % of each other. Conclusions: We have identified a number of interacting factors that may contribute to the inconsistent agreement between estimates of P atm by E and NA techniques, which underlines the need for a re-examination of the fundamental assumptions on which each method is based, and whether those assumptions are valid in any given situation. MenosAims: The primary aim of this review is to determine if methods based on 15N enrichment (E) and 15N natural abundance (NA) give consistent estimates of the proportional dependence of N2-fixing species on biological N2 fixation (P atm), and secondly to attempt to explain any inconsistencies that may be found. Methods: Published estimates of the symbiotic dependence of N2-fixing plants based on E and NA techniques applied in the same experiment were compared across scales from glasshouse pots to field plots to landscapes in agricultural and forest ecosystems, which included grain legumes, pasture and forage legumes, and woody perennials. A meta-analysis of the published data was based on correlation coefficients, box-plots and confidence intervals of means. Results: In some studies, estimates were reference plant dependent for both E and NA techniques, indicating temporal and/or spatial variations in the natural and artificial distribution of 15N, which can sometimes result in erroneous negative estimates of symbiotic dependence. While significant correlations were obtained between E and NA estimates of P atm for each of the three groups of N2-fixing species, the probability that the methods provided estimates of P atm within ?5 to +5 % of each other was 0.29 or was 0.54 within ?10 to +10 % of each other. Conclusions: We have identified a number of interacting factors that may contribute to the inconsistent agreement between estimates of P atm by E and NA techniques, which und... Mostrar Tudo |
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Palavras-Chave: |
Dependência simbiótica; Fixação biológica de nitrogênio. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02325naa a2200193 a 4500
001 2035413
005 2021-11-10
008 2016 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s11104-015-2689-9$2DOI
100 1 $aCHALK, P. M.
245 $aDo techniques based on 15N enrichment and 15N natural abundance give consistent estimates of the symbiotic dependence of N2-fixing plants?
260 $c2016
520 $aAims: The primary aim of this review is to determine if methods based on 15N enrichment (E) and 15N natural abundance (NA) give consistent estimates of the proportional dependence of N2-fixing species on biological N2 fixation (P atm), and secondly to attempt to explain any inconsistencies that may be found. Methods: Published estimates of the symbiotic dependence of N2-fixing plants based on E and NA techniques applied in the same experiment were compared across scales from glasshouse pots to field plots to landscapes in agricultural and forest ecosystems, which included grain legumes, pasture and forage legumes, and woody perennials. A meta-analysis of the published data was based on correlation coefficients, box-plots and confidence intervals of means. Results: In some studies, estimates were reference plant dependent for both E and NA techniques, indicating temporal and/or spatial variations in the natural and artificial distribution of 15N, which can sometimes result in erroneous negative estimates of symbiotic dependence. While significant correlations were obtained between E and NA estimates of P atm for each of the three groups of N2-fixing species, the probability that the methods provided estimates of P atm within ?5 to +5 % of each other was 0.29 or was 0.54 within ?10 to +10 % of each other. Conclusions: We have identified a number of interacting factors that may contribute to the inconsistent agreement between estimates of P atm by E and NA techniques, which underlines the need for a re-examination of the fundamental assumptions on which each method is based, and whether those assumptions are valid in any given situation.
653 $aDependência simbiótica
653 $aFixação biológica de nitrogênio
700 1 $aINACIO, C. T.
700 1 $aBALIEIRO, F. C.
700 1 $aROUWS, J. R. C.
773 $tPlant and Soil$gv. 399, n. 1, p. 415-426, Feb. 2016.
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Registro original: |
Embrapa Solos (CNPS) |
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| Registros recuperados : 30 | |
| 2. |  | CHALK, P. M. From production to consumption: tracing C, N, and S dynamics in brazilian agroecosystems using stable isotopes. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 9, p. 1039-1050, set. 2016. Título em português: Da produção ao consumo: traçando a dinâmica de C, N e S nos agroecossistemas brasileiros com uso de isótopos estáveis.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 17. | | INACIO, C. de T.; URQUIAGA, S.; CHALK, P. M.; MATA, M. G. F.; SOUZA, P. O. Identifying N fertilizer regime and vegetable production system in tropical Brazil using 15 N natural abundance. Journal of the Science of Food and Agriculture, London, UK, v. 95, p. 3025-3032, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 19. | | INACIO, C. de T.; URQUIAGA, S.; CHALK, P. M.; MATA, M. G. F.; SOUZA, P. O. Nitrogen isotopic composition of n-sources, vegetables and soil from two organic farming systems. In: NITROGEN WORKSHOP: THE NITROGEN CHALLENGE: BUILDING A BLUEPRINT FOR NITROGEN USE EFFICIENCY AND FOOD SECURITY, 18., 2014, Lisboa. Resumo... Lisboa: Instituto Superior de Agronomia, CEER: Biosystens Engineering; Évora: Nacional de Ivestigação Agrícola e Veterinária; Viena: International Nitrogen Initiative, 2014.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 20. | | INACIO, C. T.; URQUIAGA, S.; CHALK, P. M.; ALVES, B. J. R. Nitrogen loss (NH3, N2O) patterns in bench-scale composting. In: SIMPÓSIO INTERNACIONAL SOBRE GERENCIAMENTO DE RESÍDUOS AGROPECUÁRIOS E AGROINDUSTRIAIS, 4., 2015, Rio de Janeiro. Anais... Brasília, DF: Embrapa, 2015.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 30 | |
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