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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
25/08/2016 |
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Data da última atualização: |
02/09/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OTTONI FILHO, T. B.; LEAL, I. F.; MACEDO, J. R. de; REIS, B. C. B. |
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Afiliação: |
THEOPHILO B. OTTONI FILHO, UFRJ; ISAIAS F. LEAL, UFRJ; JOSE RONALDO DE MACEDO, CNPS; BRUNO C. B. REIS, UFRJ. |
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Título: |
An algebraic pedotransfer function to calculate standardized in situ determined field capacity. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v. 8, n. 8, p. 158-170, 2016. |
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DOI: |
10.5539/jas.v8n8p158 |
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Idioma: |
Inglês |
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Conteúdo: |
Despite the large applicability of the field capacity (FC) concept in hydrology and engineering, it presents various ambiguities and inconsistencies due to a lack of methodological procedure standardization. Experimental field and laboratory protocols taken from the literature were used in this study to determine the value of FC for different depths in 29 soil profiles, totaling 209 soil samples. The volumetric water content (θ) values were also determined at three suction values (6 kPa, 10 kPa, 33 kPa), along with bulk density (BD), texture (T) and organic matter content (OM). The protocols were devised based on the water processes involved in the FC concept aiming at minimizing hydraulic inconsistencies and procedural difficulty while maintaining the practical meaning of the concept. A high correlation between FC and θ(6 kPa) allowed the development of a pedotransfer function (Equation 3) quadratic for θ(6 kPa), resulting in an accurate and nearly bias-free calculation of FC for the four database geographic areas, with a global root mean squared residue (RMSR) of 0.026 m3·m-3. At the individual soil profile scale, the maximum RMSR was only 0.040 m3·m-3. The BD, T and OM data were generally of a low predicting quality regarding FC when not accompanied by the moisture variables. As all the FC values were obtained by the same experimental protocol and as the predicting quality of Equation 3 was clearly better than that of the classical method, which considers FC equal to θ(6), θ(10) or θ(33), we recommend using Equation 3 rather than the classical method, as well as the protocol presented here, to determine in-situ FC. MenosDespite the large applicability of the field capacity (FC) concept in hydrology and engineering, it presents various ambiguities and inconsistencies due to a lack of methodological procedure standardization. Experimental field and laboratory protocols taken from the literature were used in this study to determine the value of FC for different depths in 29 soil profiles, totaling 209 soil samples. The volumetric water content (θ) values were also determined at three suction values (6 kPa, 10 kPa, 33 kPa), along with bulk density (BD), texture (T) and organic matter content (OM). The protocols were devised based on the water processes involved in the FC concept aiming at minimizing hydraulic inconsistencies and procedural difficulty while maintaining the practical meaning of the concept. A high correlation between FC and θ(6 kPa) allowed the development of a pedotransfer function (Equation 3) quadratic for θ(6 kPa), resulting in an accurate and nearly bias-free calculation of FC for the four database geographic areas, with a global root mean squared residue (RMSR) of 0.026 m3·m-3. At the individual soil profile scale, the maximum RMSR was only 0.040 m3·m-3. The BD, T and OM data were generally of a low predicting quality regarding FC when not accompanied by the moisture variables. As all the FC values were obtained by the same experimental protocol and as the predicting quality of Equation 3 was clearly better than that of the classical method, which considers F... Mostrar Tudo |
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Palavras-Chave: |
Capacidade de campo; Drenagem interna; Funções de pedotransferência. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/146729/1/2016-026.pdf
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Marc: |
LEADER 02338naa a2200205 a 4500
001 2051668
005 2020-09-02
008 2016 bl uuuu u00u1 u #d
024 7 $a10.5539/jas.v8n8p158$2DOI
100 1 $aOTTONI FILHO, T. B.
245 $aAn algebraic pedotransfer function to calculate standardized in situ determined field capacity.$h[electronic resource]
260 $c2016
520 $aDespite the large applicability of the field capacity (FC) concept in hydrology and engineering, it presents various ambiguities and inconsistencies due to a lack of methodological procedure standardization. Experimental field and laboratory protocols taken from the literature were used in this study to determine the value of FC for different depths in 29 soil profiles, totaling 209 soil samples. The volumetric water content (θ) values were also determined at three suction values (6 kPa, 10 kPa, 33 kPa), along with bulk density (BD), texture (T) and organic matter content (OM). The protocols were devised based on the water processes involved in the FC concept aiming at minimizing hydraulic inconsistencies and procedural difficulty while maintaining the practical meaning of the concept. A high correlation between FC and θ(6 kPa) allowed the development of a pedotransfer function (Equation 3) quadratic for θ(6 kPa), resulting in an accurate and nearly bias-free calculation of FC for the four database geographic areas, with a global root mean squared residue (RMSR) of 0.026 m3·m-3. At the individual soil profile scale, the maximum RMSR was only 0.040 m3·m-3. The BD, T and OM data were generally of a low predicting quality regarding FC when not accompanied by the moisture variables. As all the FC values were obtained by the same experimental protocol and as the predicting quality of Equation 3 was clearly better than that of the classical method, which considers FC equal to θ(6), θ(10) or θ(33), we recommend using Equation 3 rather than the classical method, as well as the protocol presented here, to determine in-situ FC.
653 $aCapacidade de campo
653 $aDrenagem interna
653 $aFunções de pedotransferência
700 1 $aLEAL, I. F.
700 1 $aMACEDO, J. R. de
700 1 $aREIS, B. C. B.
773 $tJournal of Agricultural Science$gv. 8, n. 8, p. 158-170, 2016.
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Registro original: |
Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
01/03/2000 |
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Data da última atualização: |
25/02/2019 |
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Autoria: |
GHINI, R.; MEZZALAMA, M.; AMBROSOLI, R.; BARBERIS, E.; GARIBALDI, A.; PIEDADE, S. M. de S. |
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Afiliação: |
RAQUEL GHINI, CNPMA; Mônica Mezzalama, Turin University; Roberto Ambrosoli, Turin University; Elisabetta Barberis, Turin University; Angelo Garibaldi, Turin University; Sônia Maria de Stefano Piedade, Universidade de São Paulo - USP/Escola Superior de Agricultural Luiz de Queiroz - Esalq. |
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Título: |
Fusarium oxysporum strains as biocontrol agents against fusarium wilt: effects on soil microbial biomass and activity. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 1, p. 93-101, jan. 2000. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Linhagens de Fusarium oxysporum como agentes de biocontrole da murcha-de-fusarium: efeitos na biomassa e atividade microbiana do solo. |
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Conteúdo: |
Before planning the large-scale use of nonpathogenic strains of Fusarium oxysporum as biocontrol agents of Fusarium wilt, their behaviour and potential impact on soil ecosystems should be carefully studied as part of risk assessment. The aim of this work was to evaluate the effects of antagonistic F. oxysporum strains, genetically manipulated (T26/6) or not (233/1), on soil microbial biomass and activity. The effects were evaluated, in North-western Italy, in two soils from different sites at Albenga, one natural and the other previously solarized, and in a third soil obtained from a 10-year-old poplar stand (Popolus sp.), near Carignano. There were no detectable effects on ATP, fluorescein diacetate hydrolysis, and biomass P that could be attributed to the introduction of the antagonists. A transient increase of carbon dioxide evolution and biomass C was observed in response to the added inoculum. Although the results showed only some transient alterations, further studies are required to evaluate effects on specific microorganism populations. |
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Palavras-Chave: |
Patogeno de solo; Soilborne pathogen. |
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Thesagro: |
Análise de Risco; Controle Biológico. |
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Thesaurus NAL: |
biological control; risk assessment. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/16773/1/pab97_157.pdf
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Marc: |
LEADER 02017naa a2200265 a 4500
001 1101261
005 2019-02-25
008 2000 bl uuuu u00u1 u #d
100 1 $aGHINI, R.
245 $aFusarium oxysporum strains as biocontrol agents against fusarium wilt$beffects on soil microbial biomass and activity.
260 $c2000
500 $aTítulo em português: Linhagens de Fusarium oxysporum como agentes de biocontrole da murcha-de-fusarium: efeitos na biomassa e atividade microbiana do solo.
520 $aBefore planning the large-scale use of nonpathogenic strains of Fusarium oxysporum as biocontrol agents of Fusarium wilt, their behaviour and potential impact on soil ecosystems should be carefully studied as part of risk assessment. The aim of this work was to evaluate the effects of antagonistic F. oxysporum strains, genetically manipulated (T26/6) or not (233/1), on soil microbial biomass and activity. The effects were evaluated, in North-western Italy, in two soils from different sites at Albenga, one natural and the other previously solarized, and in a third soil obtained from a 10-year-old poplar stand (Popolus sp.), near Carignano. There were no detectable effects on ATP, fluorescein diacetate hydrolysis, and biomass P that could be attributed to the introduction of the antagonists. A transient increase of carbon dioxide evolution and biomass C was observed in response to the added inoculum. Although the results showed only some transient alterations, further studies are required to evaluate effects on specific microorganism populations.
650 $abiological control
650 $arisk assessment
650 $aAnálise de Risco
650 $aControle Biológico
653 $aPatogeno de solo
653 $aSoilborne pathogen
700 1 $aMEZZALAMA, M.
700 1 $aAMBROSOLI, R.
700 1 $aBARBERIS, E.
700 1 $aGARIBALDI, A.
700 1 $aPIEDADE, S. M. de S.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 35, n. 1, p. 93-101, jan. 2000.
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