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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
27/06/2017 |
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Data da última atualização: |
27/06/2017 |
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Autoria: |
GIANELLO, C.; AMORIM, M. B. |
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Afiliação: |
Clesio Gianello, UFRGS; MAGNO B. AMORIM, UFRGS. |
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Título: |
Ammonium chloride solution as an alternative laboratory procedure for exchangeable cations in Southern Brazilian soils. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, v. 46, p. 94-103, 2015. |
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DOI: |
http://dx.doi.org/10.1080/00103624.2014.988580 |
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Idioma: |
Português |
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Conteúdo: |
Abstract: Most Brazilian soil-testing laboratories use Mehlich 1 and 1.0 M potassium chloride (KCl) solutions as extractants for the determination of phosphorus (P), potassium (K), and sodium (Na) and for exchangeable calcium (Ca), magnesium (Mg), manganese (Mn), and aluminum (Al) in agricultural soil samples. Other laboratories use a combination of exchangeable ionic resin and KCl procedures. With recent adoption of the inductively coupled plasma (ICP-OES) in routine soil-testing laboratories, soil extraction with 1.0 M ammonium chloride (NH4Cl) became an alternative due to the possibility of determining all exchangeable elements in one run (Ca, Mg, K, Mn, Na, and Al), leaving determination of phosphorus (P) with Mehlich 1 or exchangeable ionic resin. To evaluate the performance of the NH4Cl solution, an experiment was carried out with thirty-seven samples of soils representative of the southernmost state of Brazil, Rio Grande do Sul. Four extraction solutions [Mehlich 1 at soil/solution ratio of 1:10 and 1.0 M ammonium acetate (NH4OAc), 1.0 M KCl, and 1.0 M NH4Cl at soil/solution ratio 1:20] were used with three different shaking times (5, 30, and 60 min). Correlation coefficients among all methods were high. Mehlich 1 did not perform well against NH4OAc and NH4Cl, despite the high correlation coefficients, with values consistently lower for K, even when the time of extraction was increased from 5 to 30 or 60 min. However, for concentrations less than 0.30 cmol kg−1 (i.e., in the range of K deficiency), both solutions performed similarly. Calcium and Mg increased with time of shaking. Comparable values of exchangeable Ca, Mg, and K, as well as of Al and Mn, were obtained with 1.0 M NH4Cl with 60 min shaking and the standard procedures of 1.0 M NH4OAc and 1.0 M KCl. The determination of Al by traditional titration/back-titration of the 1.0 M KCl solution gave slightly greater results compared to ICP-OES obtained using extraction with 1.0 M NH4Cl. The results indicate that for Ca, Mg, Mn, and Al, it is possible to replace the traditional 1.0 M KCl extraction with 1.0 M NH4Cl solution, with 60 min shaking time and a soil/solution ratio of 1:20. MenosAbstract: Most Brazilian soil-testing laboratories use Mehlich 1 and 1.0 M potassium chloride (KCl) solutions as extractants for the determination of phosphorus (P), potassium (K), and sodium (Na) and for exchangeable calcium (Ca), magnesium (Mg), manganese (Mn), and aluminum (Al) in agricultural soil samples. Other laboratories use a combination of exchangeable ionic resin and KCl procedures. With recent adoption of the inductively coupled plasma (ICP-OES) in routine soil-testing laboratories, soil extraction with 1.0 M ammonium chloride (NH4Cl) became an alternative due to the possibility of determining all exchangeable elements in one run (Ca, Mg, K, Mn, Na, and Al), leaving determination of phosphorus (P) with Mehlich 1 or exchangeable ionic resin. To evaluate the performance of the NH4Cl solution, an experiment was carried out with thirty-seven samples of soils representative of the southernmost state of Brazil, Rio Grande do Sul. Four extraction solutions [Mehlich 1 at soil/solution ratio of 1:10 and 1.0 M ammonium acetate (NH4OAc), 1.0 M KCl, and 1.0 M NH4Cl at soil/solution ratio 1:20] were used with three different shaking times (5, 30, and 60 min). Correlation coefficients among all methods were high. Mehlich 1 did not perform well against NH4OAc and NH4Cl, despite the high correlation coefficients, with values consistently lower for K, even when the time of extraction was increased from 5 to 30 or 60 min. However, for concentrations less than 0.30 cmol kg−1 ... Mostrar Tudo |
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Palavras-Chave: |
Análise de solo; Brasil; Laboratório de solo; Mehlich 1; Rio Grande do Sul; Solução de extração. |
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Thesagro: |
Cloreto de Potássio. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02954naa a2200229 a 4500
001 2071593
005 2017-06-27
008 2015 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1080/00103624.2014.988580$2DOI
100 1 $aGIANELLO, C.
245 $aAmmonium chloride solution as an alternative laboratory procedure for exchangeable cations in Southern Brazilian soils.$h[electronic resource]
260 $c2015
520 $aAbstract: Most Brazilian soil-testing laboratories use Mehlich 1 and 1.0 M potassium chloride (KCl) solutions as extractants for the determination of phosphorus (P), potassium (K), and sodium (Na) and for exchangeable calcium (Ca), magnesium (Mg), manganese (Mn), and aluminum (Al) in agricultural soil samples. Other laboratories use a combination of exchangeable ionic resin and KCl procedures. With recent adoption of the inductively coupled plasma (ICP-OES) in routine soil-testing laboratories, soil extraction with 1.0 M ammonium chloride (NH4Cl) became an alternative due to the possibility of determining all exchangeable elements in one run (Ca, Mg, K, Mn, Na, and Al), leaving determination of phosphorus (P) with Mehlich 1 or exchangeable ionic resin. To evaluate the performance of the NH4Cl solution, an experiment was carried out with thirty-seven samples of soils representative of the southernmost state of Brazil, Rio Grande do Sul. Four extraction solutions [Mehlich 1 at soil/solution ratio of 1:10 and 1.0 M ammonium acetate (NH4OAc), 1.0 M KCl, and 1.0 M NH4Cl at soil/solution ratio 1:20] were used with three different shaking times (5, 30, and 60 min). Correlation coefficients among all methods were high. Mehlich 1 did not perform well against NH4OAc and NH4Cl, despite the high correlation coefficients, with values consistently lower for K, even when the time of extraction was increased from 5 to 30 or 60 min. However, for concentrations less than 0.30 cmol kg−1 (i.e., in the range of K deficiency), both solutions performed similarly. Calcium and Mg increased with time of shaking. Comparable values of exchangeable Ca, Mg, and K, as well as of Al and Mn, were obtained with 1.0 M NH4Cl with 60 min shaking and the standard procedures of 1.0 M NH4OAc and 1.0 M KCl. The determination of Al by traditional titration/back-titration of the 1.0 M KCl solution gave slightly greater results compared to ICP-OES obtained using extraction with 1.0 M NH4Cl. The results indicate that for Ca, Mg, Mn, and Al, it is possible to replace the traditional 1.0 M KCl extraction with 1.0 M NH4Cl solution, with 60 min shaking time and a soil/solution ratio of 1:20.
650 $aCloreto de Potássio
653 $aAnálise de solo
653 $aBrasil
653 $aLaboratório de solo
653 $aMehlich 1
653 $aRio Grande do Sul
653 $aSolução de extração
700 1 $aAMORIM, M. B.
773 $tCommunications in Soil Science and Plant Analysis$gv. 46, p. 94-103, 2015.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca |
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Origem |
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Cutter |
Registro |
Volume |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
24/11/2023 |
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Data da última atualização: |
24/11/2023 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
MARETTI, C. C.; WADT, L. H. de O.; GOMES-SILVA, D. A. P.; MALDONADO, W. T. P. de; SANCHES, R. A.; COUTINHO, F.; BRITO, S. da S. |
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Afiliação: |
CLAUDIO C. MARETTI; LUCIA HELENA DE OLIVEIRA WADT, CPAF-AC; DAISY A. P. GOMES-SILVA; WANDA T. P. DE MALDONADO; ROSELY A. SANCHES; FRANCISCO COUTINHO; SEVERINO DA S. BRITO. |
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Título: |
From pre-assumptions to a 'just world conserving nature': the role of Category VI in protecting landscapes. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: BROWN, J.; MITCHELL, N.; BERESFORD, M. (ed.). The protected landscape approach: linking nature, culture and community. Cambridge, UK: IUCN, 2005. |
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Páginas: |
p. 47-64. |
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Idioma: |
Inglês |
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Conteúdo: |
This chapter discusses the role of the protected area Category VI in the conservation of landscapes. It presents perspectives on the concept of landscape and different approaches to protection of landscapes. Landscape is a concrete and a representational reality. Broader than just nature conservation with an emphasis on the cultural values of a place, the protected landscape approach must include participatory processes and integration within regional planning and management. |
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Palavras-Chave: |
Área protegida; Paisagem. |
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Thesaurus NAL: |
Conservation areas; Landscape ecology. |
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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/doc/1158691/1/27613.pdf
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Marc: |
LEADER 01339naa a2200253 a 4500
001 2158691
005 2023-11-24
008 2005 bl uuuu u00u1 u #d
100 1 $aMARETTI, C. C.
245 $aFrom pre-assumptions to a 'just world conserving nature'$bthe role of Category VI in protecting landscapes.$h[electronic resource]
260 $c2005
300 $ap. 47-64.
520 $aThis chapter discusses the role of the protected area Category VI in the conservation of landscapes. It presents perspectives on the concept of landscape and different approaches to protection of landscapes. Landscape is a concrete and a representational reality. Broader than just nature conservation with an emphasis on the cultural values of a place, the protected landscape approach must include participatory processes and integration within regional planning and management.
650 $aConservation areas
650 $aLandscape ecology
653 $aÁrea protegida
653 $aPaisagem
700 1 $aWADT, L. H. de O.
700 1 $aGOMES-SILVA, D. A. P.
700 1 $aMALDONADO, W. T. P. de
700 1 $aSANCHES, R. A.
700 1 $aCOUTINHO, F.
700 1 $aBRITO, S. da S.
773 $tIn: BROWN, J.; MITCHELL, N.; BERESFORD, M. (ed.). The protected landscape approach: linking nature, culture and community. Cambridge, UK: IUCN, 2005.
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