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Registro Completo |
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
13/11/2019 |
Data da última atualização: |
11/11/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CHALK, P. M.; INACIO, C. de T.; CHEN, D. |
Afiliação: |
PHILLIP MICHAEL CHALK, UNIVERSITY OF MELBOURNE; CAIO DE TEVES INACIO, CNPS; DELI CHEN, UNIVERSITY OF MELBOURNE. |
Título: |
An overview of contemporary advances in the usage of 15N natural abundance (delta N-15) as a tracer of agro-ecosystem N cycle processes that impact the environment. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Agriculture, Ecosystems & Environment, v. 283, 106570, Nov. 2019. |
DOI: |
https://doi.org/10.1016/j.agee.2019.106570 |
Idioma: |
Inglês |
Conteúdo: |
During the past 20 years there have been major advances in the application of 15N natural abundance (NA) measurements to trace the pathways and magnitudes of N fluxes in the soil-plant-atmosphere continuum. However, estimates are often not quantitative due to the unknown extent of isotopic fractionation during a particular N transformation under study, when other processes compete simultaneously for substrate. Examples are the estimation of N fertilizer use efficiency or the transfer of biologically-fixed N2 to non-fixing companion species in intercrops or crop sequences. In some cases it has been possible to identify a particular process or source leading to a change in the relative isotopic composition (delta15N signature) of a system component, by innovative selection of experimental conditions that isolate the source or process from confounding factors. Nevertheless, there are examples where significant contemporary advances have occurred in the application of NA as a quantitative tracer, such as in the estimation of the symbiotic dependence of a range of N2 fixing plants. The key is the estimation of isotopic fractionation during N2 fixation and assimilation, and new knowledge has been obtained on factors contributing to variation, and new approaches devised to obtain more accurate estimates of fractionation. A second example is the innovative application of isotopomer measurements of the potent greenhouse gas N2O that enable presumptive identification of the biological and chemical processes resulting in its production under various agricultural scenarios. MenosDuring the past 20 years there have been major advances in the application of 15N natural abundance (NA) measurements to trace the pathways and magnitudes of N fluxes in the soil-plant-atmosphere continuum. However, estimates are often not quantitative due to the unknown extent of isotopic fractionation during a particular N transformation under study, when other processes compete simultaneously for substrate. Examples are the estimation of N fertilizer use efficiency or the transfer of biologically-fixed N2 to non-fixing companion species in intercrops or crop sequences. In some cases it has been possible to identify a particular process or source leading to a change in the relative isotopic composition (delta15N signature) of a system component, by innovative selection of experimental conditions that isolate the source or process from confounding factors. Nevertheless, there are examples where significant contemporary advances have occurred in the application of NA as a quantitative tracer, such as in the estimation of the symbiotic dependence of a range of N2 fixing plants. The key is the estimation of isotopic fractionation during N2 fixation and assimilation, and new knowledge has been obtained on factors contributing to variation, and new approaches devised to obtain more accurate estimates of fractionation. A second example is the innovative application of isotopomer measurements of the potent greenhouse gas N2O that enable presumptive identification of the biological... Mostrar Tudo |
Thesagro: |
Amônia; Composto Orgânico; Fertilizante; Nitrogênio; Solo. |
Thesaurus Nal: |
Ammonia; Composts; Fertilizers; Soil. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02420naa a2200265 a 4500 001 2114276 005 2021-11-11 008 2019 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.agee.2019.106570$2DOI 100 1 $aCHALK, P. M. 245 $aAn overview of contemporary advances in the usage of 15N natural abundance (delta N-15) as a tracer of agro-ecosystem N cycle processes that impact the environment.$h[electronic resource] 260 $c2019 520 $aDuring the past 20 years there have been major advances in the application of 15N natural abundance (NA) measurements to trace the pathways and magnitudes of N fluxes in the soil-plant-atmosphere continuum. However, estimates are often not quantitative due to the unknown extent of isotopic fractionation during a particular N transformation under study, when other processes compete simultaneously for substrate. Examples are the estimation of N fertilizer use efficiency or the transfer of biologically-fixed N2 to non-fixing companion species in intercrops or crop sequences. In some cases it has been possible to identify a particular process or source leading to a change in the relative isotopic composition (delta15N signature) of a system component, by innovative selection of experimental conditions that isolate the source or process from confounding factors. Nevertheless, there are examples where significant contemporary advances have occurred in the application of NA as a quantitative tracer, such as in the estimation of the symbiotic dependence of a range of N2 fixing plants. The key is the estimation of isotopic fractionation during N2 fixation and assimilation, and new knowledge has been obtained on factors contributing to variation, and new approaches devised to obtain more accurate estimates of fractionation. A second example is the innovative application of isotopomer measurements of the potent greenhouse gas N2O that enable presumptive identification of the biological and chemical processes resulting in its production under various agricultural scenarios. 650 $aAmmonia 650 $aComposts 650 $aFertilizers 650 $aSoil 650 $aAmônia 650 $aComposto Orgânico 650 $aFertilizante 650 $aNitrogênio 650 $aSolo 700 1 $aINACIO, C. de T. 700 1 $aCHEN, D. 773 $tAgriculture, Ecosystems & Environment$gv. 283, 106570, Nov. 2019.
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Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
05/03/2012 |
Data da última atualização: |
23/09/2019 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MESQUITA, T. M. O.; SILVA, G. L.; VASCONCELOS, E. C. G.; CAVALCANTE, A. C. R.; CUTRIM JÚNIOR, J. A. A. |
Afiliação: |
Tony Maiko Oliveira Mesquita, Graduação, UVA; Gutenberg Lira Silva, Pós-graduação, UFC; Elayne Cristina Gadelha Vasconcelos, Graduação, UVA; ANA CLARA RODRIGUES CAVALCANTE, CNPC; José Antonio Alves Cutrim Junior. |
Título: |
Acúmulo de biomassa de forragem em capim-tifton 85 (Cynodon spp.) pelo o método da morfogênese. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
In: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA UNIVERSIDADE ESTADUAL VALE DO ACARAÚ, 13., 2011, Sobral. [Resumos...]. Sobral: Universidade Estadual Vale do Acaraú, 2011. |
Idioma: |
Português |
Palavras-Chave: |
Acúmulo de forragem; Adubação nitrogênada. |
Thesagro: |
Morfogênese. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/55083/1/RAC-Acumulo-de-biomassa-de-forragem.pdf
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Marc: |
LEADER 00729nam a2200181 a 4500 001 1917536 005 2019-09-23 008 2011 bl uuuu u00u1 u #d 100 1 $aMESQUITA, T. M. O. 245 $aAcúmulo de biomassa de forragem em capim-tifton 85 (Cynodon spp.) pelo o método da morfogênese.$h[electronic resource] 260 $aIn: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA UNIVERSIDADE ESTADUAL VALE DO ACARAÚ, 13., 2011, Sobral. [Resumos...]. Sobral: Universidade Estadual Vale do Acaraú$c2011 650 $aMorfogênese 653 $aAcúmulo de forragem 653 $aAdubação nitrogênada 700 1 $aSILVA, G. L. 700 1 $aVASCONCELOS, E. C. G. 700 1 $aCAVALCANTE, A. C. R. 700 1 $aCUTRIM JÚNIOR, J. A. A.
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