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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
18/10/1995 |
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Data da última atualização: |
07/04/2017 |
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Autoria: |
ROSS, D. J. |
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Título: |
Influence of sieve mesh size on estimates of microbial C and N by fumigation-extraction procedures in soils under pasture. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Soil Biology Biochemistry, v.24, n.4, p.343-350, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
Measurements were made with five soils from perennial, grazed pastures of the influence of sequential sieving through a 5.6 and 2 mm mesh on estimates of (a) extractable C and N, (b) flushes of C and N, determined by fumigation extraction methods, and (c) mineral-N flush determined by a fumigation-incubation procedure. Wet winter samples, partially dried winter samples and drier summer samples were used. Levels of extractable C and N were highest in smeared and compared, < 2 mm winter samples, largely because of a sieving artefact. In the summer samples, levels were mainly unaffected by sieve mesh size. Flushes of extractable C and N were generally lower in < 2 mm soil than in < 5.6 mm soil; they highest in root residues remaining on the 2 mm mesh. Estimates of mineral-N flush were, however, influenced little by sieve mesh size. Partial drying of the winter samples had no effect on flushes of extractable C, but slightly lowered some extractable-N flush values. In contrast, mineral-N flush values of three of the soils were higher after partial drying. Implications of these for the assessment of kec- and ken-factors, to convert flushes of extractable C and N to microbial C and N, respectively, are discussed. Sieving effects did occur, but they appeared, overall, less marked than other variables influencing these factors. |
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Palavras-Chave: |
Pasture. |
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Thesagro: |
Bioquímica; Pastagem; Solo. |
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Thesaurus Nal: |
biochemistry; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01892naa a2200193 a 4500
001 1786532
005 2017-04-07
008 1992 bl --- 0-- u #d
100 1 $aROSS, D. J.
245 $aInfluence of sieve mesh size on estimates of microbial C and N by fumigation-extraction procedures in soils under pasture.
260 $c1992
520 $aMeasurements were made with five soils from perennial, grazed pastures of the influence of sequential sieving through a 5.6 and 2 mm mesh on estimates of (a) extractable C and N, (b) flushes of C and N, determined by fumigation extraction methods, and (c) mineral-N flush determined by a fumigation-incubation procedure. Wet winter samples, partially dried winter samples and drier summer samples were used. Levels of extractable C and N were highest in smeared and compared, < 2 mm winter samples, largely because of a sieving artefact. In the summer samples, levels were mainly unaffected by sieve mesh size. Flushes of extractable C and N were generally lower in < 2 mm soil than in < 5.6 mm soil; they highest in root residues remaining on the 2 mm mesh. Estimates of mineral-N flush were, however, influenced little by sieve mesh size. Partial drying of the winter samples had no effect on flushes of extractable C, but slightly lowered some extractable-N flush values. In contrast, mineral-N flush values of three of the soils were higher after partial drying. Implications of these for the assessment of kec- and ken-factors, to convert flushes of extractable C and N to microbial C and N, respectively, are discussed. Sieving effects did occur, but they appeared, overall, less marked than other variables influencing these factors.
650 $abiochemistry
650 $asoil
650 $aBioquímica
650 $aPastagem
650 $aSolo
653 $aPasture
773 $tSoil Biology Biochemistry$gv.24, n.4, p.343-350, 1992.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 3 | |
| 1. |  | TREVISOL, I. M.; JAENISCH, F. R. F.; SILVA, V. S.; BRENTANO, L.; COLDEBELLA, A.; PALUDO, E.; GRITTI, D.; ROSS, D.; ESTEVES, P. A. Caracterização do genoma e teste de proteção vacinal para amostras do vírus da bronquite infecciosa das aves associadas a surtos ?atípicos?? da doença. In: COLDEBELLA, A.; SCHEUERMANN, G. N. (Ed.). Relatório de projetos concluídos 2011. Concórdia: Embrapa Suínos e Aves, 2012. p. 165-177. (Embrapa Suínos e Aves. Documentos, 156). Projeto/Plano de Ação: 02.05.01.018.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Suínos e Aves. |
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| 2. | | BONIN, M. N.; FEIJO, G. L. D.; SILVA, S. L.; BUNGER, L.; ROSS, D.; GOMES, R. da C.; MENEZES, G. R. de O.; SANTANA, M. H. A.; BARBOSA, V. N.; NOVAIS, F. J.; FERRAZ, A. L. J.; SURITA, L. M. A.; FERRAZ, J. B. S. Acurária de curvas de calibração do VIS-NIRS para predição da maciez da carne de bovinos cruzados. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 11., 2015, Campo Grande, MS. Anais... Campo Grande: Embrapa Gado de Corte, 2015. 114 p. (Embrapa Gado de Corte. Documentos, 213).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 3. | | BONIN, N.; SILVA, S. L.; BUNGER, L.; ROSS, D.; CRAIGIE, C.; GOMES, R. da C.; FIGUEIREDO, A.; TORRALVO. P.; CAMPO, J. H. A.; BARBOSA, V. N.; NOVAIS, F. J.; SANTANA, M. H. A.; OLIVEIRA, L. S.; MAZON, M.; FERRAZ, J. B. S. Visible and near infrared reflectance spectroscopy (Vis-NIRS) to predict tenderness in Nellore cattle. Journal of Animal Science v.91, (E - Supplement 2); Journal of Dairy Science, v.96, (E - Supplement 1), p.575, 2013. TH294| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 3 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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