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Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
21/09/2021 |
Data da última atualização: |
21/09/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ALLEONI, L. R. F.; PEIXOTO, R. T. dos G.; AZEVEDO, A. C. de; MELO, L. C. A. |
Afiliação: |
LUIS REYNALDO FERRACCIU ALLEONI, ESALQ/USP; RICARDO TRIPPIA DOS G PEIXOTO, CNPS; ANTONIO CARLOS DE AZEVEDO, USP; LEONIDAS CARRIJO AZEVEDO MELO, USP. |
Título: |
Components of surface charge in tropical soils with contrasting mineralogies. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
Soil Science, v. 174, n. 11, p. 629-638, Nov. 2009. |
DOI: |
http://doi.org/10.1097/SS.0b013e3181c17a93 |
Idioma: |
Inglês |
Conteúdo: |
Study of surface electric charges of soil colloids helps in understanding the physicochemical phenomena that influence the capacity of retaining nutrients and their availability to plants. The structural charge (sigma(0), (min)), the variable charge (sigma(q, min)), and the organic matter (OM) charge (sigma(total) (OM)) of 12 tropical soils with contrasting mineralogies were evaluated based on the difference of selectivity for Cs+ and Li+ between the functional ionizable surfaces groups and the mineral 2:1 siloxane surface. Soils were divided into three groups: G1, soils with a predominance of kaolinite and gibbsite in the clay fraction; G2, soils with hydroxy-interlayered 2:1 minerals; and G3, soils with smectite but without hydroxy-interlayered 2:1 minerals. The Cs absorption method was efficient for detecting the charge components in tropical soils. The mineral structural charge contributed 11% and 16%, 28% and 31%, and 52% and 59% of total soil charge of A and B horizons of soils from groups G 1, G2, and G3, respectively. On the other hand, OM contributed 53% and 37%, 48% and 41%, and 21% and 20% of total charge for the same samples, respectively, In highly weathered soils of group G I and, to a lesser extent, in soils in group G2, surface charges depended mainly on their variable components, resulting from the OM (sigma(toal) (OM)), as well as from imperfections found in 1:1 minerals (sigma(q, min)). The importance of OM in determining the magnitude of electric charges in humid tropical soils is highlighted. MenosStudy of surface electric charges of soil colloids helps in understanding the physicochemical phenomena that influence the capacity of retaining nutrients and their availability to plants. The structural charge (sigma(0), (min)), the variable charge (sigma(q, min)), and the organic matter (OM) charge (sigma(total) (OM)) of 12 tropical soils with contrasting mineralogies were evaluated based on the difference of selectivity for Cs+ and Li+ between the functional ionizable surfaces groups and the mineral 2:1 siloxane surface. Soils were divided into three groups: G1, soils with a predominance of kaolinite and gibbsite in the clay fraction; G2, soils with hydroxy-interlayered 2:1 minerals; and G3, soils with smectite but without hydroxy-interlayered 2:1 minerals. The Cs absorption method was efficient for detecting the charge components in tropical soils. The mineral structural charge contributed 11% and 16%, 28% and 31%, and 52% and 59% of total soil charge of A and B horizons of soils from groups G 1, G2, and G3, respectively. On the other hand, OM contributed 53% and 37%, 48% and 41%, and 21% and 20% of total charge for the same samples, respectively, In highly weathered soils of group G I and, to a lesser extent, in soils in group G2, surface charges depended mainly on their variable components, resulting from the OM (sigma(toal) (OM)), as well as from imperfections found in 1:1 minerals (sigma(q, min)). The importance of OM in determining the magnitude of electric charges ... Mostrar Tudo |
Thesagro: |
Matéria Orgânica; Solo. |
Thesaurus Nal: |
Soil organic matter. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02176naa a2200205 a 4500 001 2134609 005 2021-09-21 008 2009 bl uuuu u00u1 u #d 024 7 $ahttp://doi.org/10.1097/SS.0b013e3181c17a93$2DOI 100 1 $aALLEONI, L. R. F. 245 $aComponents of surface charge in tropical soils with contrasting mineralogies.$h[electronic resource] 260 $c2009 520 $aStudy of surface electric charges of soil colloids helps in understanding the physicochemical phenomena that influence the capacity of retaining nutrients and their availability to plants. The structural charge (sigma(0), (min)), the variable charge (sigma(q, min)), and the organic matter (OM) charge (sigma(total) (OM)) of 12 tropical soils with contrasting mineralogies were evaluated based on the difference of selectivity for Cs+ and Li+ between the functional ionizable surfaces groups and the mineral 2:1 siloxane surface. Soils were divided into three groups: G1, soils with a predominance of kaolinite and gibbsite in the clay fraction; G2, soils with hydroxy-interlayered 2:1 minerals; and G3, soils with smectite but without hydroxy-interlayered 2:1 minerals. The Cs absorption method was efficient for detecting the charge components in tropical soils. The mineral structural charge contributed 11% and 16%, 28% and 31%, and 52% and 59% of total soil charge of A and B horizons of soils from groups G 1, G2, and G3, respectively. On the other hand, OM contributed 53% and 37%, 48% and 41%, and 21% and 20% of total charge for the same samples, respectively, In highly weathered soils of group G I and, to a lesser extent, in soils in group G2, surface charges depended mainly on their variable components, resulting from the OM (sigma(toal) (OM)), as well as from imperfections found in 1:1 minerals (sigma(q, min)). The importance of OM in determining the magnitude of electric charges in humid tropical soils is highlighted. 650 $aSoil organic matter 650 $aMatéria Orgânica 650 $aSolo 700 1 $aPEIXOTO, R. T. dos G. 700 1 $aAZEVEDO, A. C. de 700 1 $aMELO, L. C. A. 773 $tSoil Science$gv. 174, n. 11, p. 629-638, Nov. 2009.
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Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
07/03/2018 |
Data da última atualização: |
07/03/2018 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
TEIXEIRA, P. C.; CAMPOS, D. V. B. de. |
Afiliação: |
PAULO CESAR TEIXEIRA, CNPS; DAVID VILAS BOAS DE CAMPOS, CNPS. |
Título: |
Relações moleculares Ki e Kr. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
In: TEIXEIRA, P. C.; DONAGEMMA, G. K.; FONTANA, A.; TEIXEIRA, W. G. (Ed.). Manual de métodos de análise de solo. 3. ed. rev. e ampl. Brasília, DF: Embrapa, 2017. pt. 2, cap. 17, p. 286-287. |
Idioma: |
Português |
Conteúdo: |
Cálculos de Ki e Kr. |
Thesagro: |
Análise do solo. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/173605/1/Pt-2-Cap-17-Relacoes-moleculares-Ki-e-Kr.pdf
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Marc: |
LEADER 00562naa a2200145 a 4500 001 2088695 005 2018-03-07 008 2017 bl uuuu u00u1 u #d 100 1 $aTEIXEIRA, P. C. 245 $aRelações moleculares Ki e Kr.$h[electronic resource] 260 $c2017 520 $aCálculos de Ki e Kr. 650 $aAnálise do solo 700 1 $aCAMPOS, D. V. B. de 773 $tIn: TEIXEIRA, P. C.; DONAGEMMA, G. K.; FONTANA, A.; TEIXEIRA, W. G. (Ed.). Manual de métodos de análise de solo. 3. ed. rev. e ampl. Brasília, DF: Embrapa, 2017. pt. 2, cap. 17, p. 286-287.
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