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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/07/1999 |
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Data da última atualização: |
16/07/1999 |
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Autoria: |
ZECH, W.; AMELUNG, W.; NEUFELDT, H. |
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Título: |
Organic matter in termite mounds of the Brazilian cerrados. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. |
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Páginas: |
p.198-202. |
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Idioma: |
Inglês |
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Conteúdo: |
This study assessed differences between soil organic matter (SOM) in termite mounds and that of surrounding clayey and loamy Oxisols in the Brazilian savannas, also known as the Cerrados. Samples were fractionated into clay (<2 um), silt (2-50 um), and sand (50-250 um), and the fractions' SOM was characterized according to C, N, lignin, and carbohydrates. In the mounds, soil organic carbon (SOC) is enriched by a factor of 3.5 and 11.5 in the clayey and loamy Oxisols, respectively. Especially in the sand fraction, the SOC accumulated as particulate SOM. However, in all size fractions, we found higher lignin contents, lower ratios of acids to aldehydes of lignin-derived phenols, and lower ratios of microbial to plant-derived monosugars than in the fractions of the surrounding soil. These findings suggest that the SOM of the mounds is less decomposed. |
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Thesagro: |
Carboidrato; Cerrado; Cupim; Matéria Orgânica; Oxisol; Solo; Termitidae. |
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Thesaurus Nal: |
carbohydrates; Ferralsols; organic matter; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01704naa a2200289 a 4500
001 1545412
005 1999-07-16
008 1999 bl uuuu u00u1 u #d
100 1 $aZECH, W.
245 $aOrganic matter in termite mounds of the Brazilian cerrados.
260 $c1999
300 $ap.198-202.
520 $aThis study assessed differences between soil organic matter (SOM) in termite mounds and that of surrounding clayey and loamy Oxisols in the Brazilian savannas, also known as the Cerrados. Samples were fractionated into clay (<2 um), silt (2-50 um), and sand (50-250 um), and the fractions' SOM was characterized according to C, N, lignin, and carbohydrates. In the mounds, soil organic carbon (SOC) is enriched by a factor of 3.5 and 11.5 in the clayey and loamy Oxisols, respectively. Especially in the sand fraction, the SOC accumulated as particulate SOM. However, in all size fractions, we found higher lignin contents, lower ratios of acids to aldehydes of lignin-derived phenols, and lower ratios of microbial to plant-derived monosugars than in the fractions of the surrounding soil. These findings suggest that the SOM of the mounds is less decomposed.
650 $acarbohydrates
650 $aFerralsols
650 $aorganic matter
650 $asoil
650 $aCarboidrato
650 $aCerrado
650 $aCupim
650 $aMatéria Orgânica
650 $aOxisol
650 $aSolo
650 $aTermitidae
700 1 $aAMELUNG, W.
700 1 $aNEUFELDT, H.
773 $tIn: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
07/05/2015 |
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Data da última atualização: |
07/05/2015 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
GUIMARÃES, C. M.; STONE, L. F.; CASTRO, A. P. de; MORAIS JUNIOR, O. P. de. |
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Afiliação: |
CLEBER MORAIS GUIMARAES, CNPAF; LUIS FERNANDO STONE, CNPAF; ADRIANO PEREIRA DE CASTRO, CNPAF; ODILON PEIXOTO DE MORAIS JUNIOR. |
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Título: |
Feasibility of using physiological parameters to select upland rice genotypes with tolerance to water deficit. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: CONFERENCIA INTERNACIONAL DO ARROZ PARA AMÉRICA LATINA E CARIBE, 12., 2015, Porto Alegre. Horizonte para a competitividade: anais. Porto Alegre: IRGA, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to evaluate the feasibility of using physiological parameters of water deficit tolerance as an auxiliary method in selecting upland rice genotypes for regions with irregular rainfall distribution. |
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Thesagro: |
Arroz; Deficiência hídrica; Oryza sativa; Resistência a seca. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/123393/1/p91.pdf
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Marc: |
LEADER 00940nam a2200193 a 4500
001 2014979
005 2015-05-07
008 2015 bl uuuu u00u1 u #d
100 1 $aGUIMARÃES, C. M.
245 $aFeasibility of using physiological parameters to select upland rice genotypes with tolerance to water deficit.$h[electronic resource]
260 $aIn: CONFERENCIA INTERNACIONAL DO ARROZ PARA AMÉRICA LATINA E CARIBE, 12., 2015, Porto Alegre. Horizonte para a competitividade: anais. Porto Alegre: IRGA$c2015
520 $aThis study aimed to evaluate the feasibility of using physiological parameters of water deficit tolerance as an auxiliary method in selecting upland rice genotypes for regions with irregular rainfall distribution.
650 $aArroz
650 $aDeficiência hídrica
650 $aOryza sativa
650 $aResistência a seca
700 1 $aSTONE, L. F.
700 1 $aCASTRO, A. P. de
700 1 $aMORAIS JUNIOR, O. P. de
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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