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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
11/03/2021 |
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Data da última atualização: |
11/03/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
MARTINS, M. R.; SARKIS, L. F.; SANTANNA, S. A. C.; SANTOS, C. A.; ARAUJO, K. E.; SANTOS, R. C.; ARAUJO, E. da S.; JANTALIA, C. P.; BODDEY, R. M.; ZAMAN, M.; URQUIAGA, S. |
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Afiliação: |
MÁRCIO R.MARTINS, UFRRJ; ABCLEONARDO F. SARKIS, UFRRJ; SELENOBALDO A. C. SANT'ANNA, UFRRJ; CAMILA A.SANTOS, UFRRJ; KARLA E. ARAUJO; RICARDO C. SANTOS; EDNALDO DA SILVA ARAUJO, CNPAB; CLAUDIA POZZI JANTALIA, CNPAB; ROBERT MICHAEL BODDEY, CNPAB; FAO/IAEA; SEGUNDO SACRAMENTO U CABALLERO, CNPAB. |
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Título: |
Optimizing the use of open chambers to measure ammonia volatilization in field plots amended with urea. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Pedosphere, v. 31, n. 2, p. 243-254, 2021. |
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ISSN: |
1002-0160 |
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DOI: |
10.1016/S1002-0160(20)60078-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Measuring ammonia (NH3) volatilization from urea-fertilized soils is crucial for evaluation of practices that reduce gaseous nitrogen (N) losses in agriculture. The small area of chambers used for NH3 volatilization measurements compared with the size of field plots may cause significant errors if inadequate sampling strategies are adopted. Our aims were: i) to investigate the effect of using multiple open chambers on the variability in the measurement of NH3 volatilization in urea-amended field plots and ii) to define the critical period of NH3-N losses during which the concentration of sampling effort is capable of reducing uncertainty. The use of only one chamber covering 0.015% of the plot (51.84 m2 ) generates a value of NH3-N loss within an expected margin of error of 30% around the true mean. To reduce the error margin by half (15%), 3?7 cha mbers were required with a mean of 5 chambers per plot. Concentrating the sampling efforts in the first two weeks after urea application, which is usually the most critical period of N losses and associated errors, represents an efficient strategy to lessen uncertainty in the measurements of NH3 volatilization. This strategy enhances the power of detection of NH3-N loss abatement in field experiments using chambers. |
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Palavras-Chave: |
Chamber method; Experimental error; Gas emission; Low cost chamber; Nitrogen cycling; Nitrogen loss; Soil variability. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02279naa a2200349 a 4500
001 2130628
005 2021-03-11
008 2021 bl uuuu u00u1 u #d
022 $a1002-0160
024 7 $a10.1016/S1002-0160(20)60078-9$2DOI
100 1 $aMARTINS, M. R.
245 $aOptimizing the use of open chambers to measure ammonia volatilization in field plots amended with urea.$h[electronic resource]
260 $c2021
520 $aMeasuring ammonia (NH3) volatilization from urea-fertilized soils is crucial for evaluation of practices that reduce gaseous nitrogen (N) losses in agriculture. The small area of chambers used for NH3 volatilization measurements compared with the size of field plots may cause significant errors if inadequate sampling strategies are adopted. Our aims were: i) to investigate the effect of using multiple open chambers on the variability in the measurement of NH3 volatilization in urea-amended field plots and ii) to define the critical period of NH3-N losses during which the concentration of sampling effort is capable of reducing uncertainty. The use of only one chamber covering 0.015% of the plot (51.84 m2 ) generates a value of NH3-N loss within an expected margin of error of 30% around the true mean. To reduce the error margin by half (15%), 3?7 cha mbers were required with a mean of 5 chambers per plot. Concentrating the sampling efforts in the first two weeks after urea application, which is usually the most critical period of N losses and associated errors, represents an efficient strategy to lessen uncertainty in the measurements of NH3 volatilization. This strategy enhances the power of detection of NH3-N loss abatement in field experiments using chambers.
653 $aChamber method
653 $aExperimental error
653 $aGas emission
653 $aLow cost chamber
653 $aNitrogen cycling
653 $aNitrogen loss
653 $aSoil variability
700 1 $aSARKIS, L. F.
700 1 $aSANTANNA, S. A. C.
700 1 $aSANTOS, C. A.
700 1 $aARAUJO, K. E.
700 1 $aSANTOS, R. C.
700 1 $aARAUJO, E. da S.
700 1 $aJANTALIA, C. P.
700 1 $aBODDEY, R. M.
700 1 $aZAMAN, M.
700 1 $aURQUIAGA, S.
773 $tPedosphere$gv. 31, n. 2, p. 243-254, 2021.
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Embrapa Agrobiologia (CNPAB) |
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