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Registro Completo |
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
25/08/2016 |
Data da última atualização: |
02/09/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
OTTONI FILHO, T. B.; LEAL, I. F.; MACEDO, J. R. de; REIS, B. C. B. |
Afiliação: |
THEOPHILO B. OTTONI FILHO, UFRJ; ISAIAS F. LEAL, UFRJ; JOSE RONALDO DE MACEDO, CNPS; BRUNO C. B. REIS, UFRJ. |
Título: |
An algebraic pedotransfer function to calculate standardized in situ determined field capacity. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of Agricultural Science, v. 8, n. 8, p. 158-170, 2016. |
DOI: |
10.5539/jas.v8n8p158 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Capacidade de campo; Drenagem interna; Funções de pedotransferência. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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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Embrapa Solos (CNPS) |
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Registros recuperados : 5 | |
2. | | MACEDO, J. R. de; SILVA, E. F. da; CAPECHE, C. L.; MELO, A. da S.; LEITÃO, K.; LEAL, I. F. Caracterização e classificação dos solos dos assentamentos agrícolas Sebastião Lan I e II no município de Casimiro de Abreu/RJ. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 32., 2009, Fortaleza. O solo e a produção de bioenergia: perspectivas e desafios. [Viçosa, MG]: SBCS; Fortaleza: UFC, 2009. 1 CD-ROM.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Solos. |
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3. | | SILVA, E. F. da; MACEDO, J. R. de; CAPECHE, C. L.; MELO, A. da S.; DART, R. de O.; LEAL, I. F.; LEITÃO, K.; OLIVEIRA, C. C. Aptidão Agrícola e adequação de uso das terras do assentamento-acampamento Sebastião Lan I e II. Rio de Janeiro: Embrapa Solos, 2010. 34 p. (Embrapa Solos. Boletim de pesquisa e desenvolvimento, 207).Tipo: Boletim de Pesquisa e Desenvolvimento |
Biblioteca(s): Embrapa Solos. |
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4. | | MACEDO, J. R. de; SILVA, E. F. da; CAPECHE, C. L.; MELO, A. da S.; OLIVEIRA, C. C. de; LEAL, I. F. Comportamento do lençol freático e determinação das propriedades químicas em solos sulfatos ácidos no município de Casimiro de Abreu/RJ. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 32., 2009, Fortaleza. O solo e a produção de bioenergia: perspectivas e desafios. [Viçosa, MG]: SBCS; Fortaleza: UFC, 2009. 1 CD-ROM.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Solos. |
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5. | | FAVARO, S. P.; MIRANDA, C. H. B.; LIMA, K. Q.; SHINZATO, N. S. U.; LEAL, I. F. C. dos s.; GAMBETTA, R.; RODRIGUES, D. de S. Princípios da extração sem solvente e tecnologias potenciais para obtenção de óleos vegetais. Brasília, DF: Embrapa Agroenergia, 2022. (Embrapa Agroenergia. Documentos, 43)Biblioteca(s): Embrapa Agroenergia. |
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