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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia; Embrapa Unidades Centrais. |
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Data corrente: |
23/03/2009 |
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Data da última atualização: |
27/09/2022 |
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Tipo da produção científica: |
Sistema de Produção |
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Autoria: |
UTUMI, M. M. (Ed.). |
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Afiliação: |
Marley Marico Utumi, Embrapa Rondônia. |
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Título: |
Sistema de produção de arroz de terras altas. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Porto Velho: Embrapa Rondônia, 2008. |
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Páginas: |
32 p. |
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Série: |
(Embrapa Rondônia. Sistemas de Produção, 31). |
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Idioma: |
Português |
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Conteúdo: |
Caracterização dos níveis tecnológicos; Baixa tecnologia; Média tecnologia; Recomendações técnicas: Escolha da área; Limpeza da área; Amostragem do solo; Preparo do solo; Correção da acidez do solo; Adubação; Semeadura; Cultivares; Controle de plantas daninhas; Controle de pragas; Principais insetos-pragas do arroz armazenado; Principais doenças do arroz; Controle das doenças; Colheita; Secagem; Armazenamento; Comercialização; Coeficientes técnicos e custos. |
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Palavras-Chave: |
Rondônia. |
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Thesagro: |
Arroz. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/24656/1/sp-31.pdf
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Marc: |
LEADER 00908nam a2200157 a 4500
001 1709721
005 2022-09-27
008 2008 bl uuuu u0uu1 u #d
100 1 $aUTUMI, M. M. (Ed.).
245 $aSistema de produção de arroz de terras altas.
260 $aPorto Velho: Embrapa Rondônia$c2008
300 $a32 p.
490 $a(Embrapa Rondônia. Sistemas de Produção, 31).
520 $aCaracterização dos níveis tecnológicos; Baixa tecnologia; Média tecnologia; Recomendações técnicas: Escolha da área; Limpeza da área; Amostragem do solo; Preparo do solo; Correção da acidez do solo; Adubação; Semeadura; Cultivares; Controle de plantas daninhas; Controle de pragas; Principais insetos-pragas do arroz armazenado; Principais doenças do arroz; Controle das doenças; Colheita; Secagem; Armazenamento; Comercialização; Coeficientes técnicos e custos.
650 $aArroz
653 $aRondônia
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
20/10/2021 |
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Data da última atualização: |
20/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOHI, S. P.; MAHIEU, N.; POWLSON, D. S.; MADARI, B. E.; SMITTENBERG, R. H.; GAUNT, J. L. |
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Afiliação: |
SARAN P. SOHI, ROTHAMSTED RESEARCH; NATHALIE MAHIEU, UNIVERSITY OF LONDON; DAVID S. POWLSON, ROTHAMSTED RESEARCH; BEATA EMOKE MADARI, CNPS; RIENK H. SMITTENBERG, MASSACHUSETTS INSTITUTE OF TECHNOLOGY; JOHN L. GAUNT, ROTHAMSTED RESEARCH. |
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Título: |
Investigating the chemical characteristics of soil organic matter fractions suitable for modeling. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, v. 69, n. 4, p. 1248-1255, Jul. 2005. |
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DOI: |
https://doi.org/10.2136/sssaj2004.0262 |
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Idioma: |
Inglês |
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Notas: |
Na publicação: Beatá Madari. |
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Conteúdo: |
Current models of soil organic matter (SOM) turnover tend to invoke pools that are defined by their contrasting first-order reactivity constants but which cannot be directly measured. New models may be based around fractions defined by procedures that can be used to isolate them experimentally. The drawback of such fractions is that they may display properties that are not sufficiently distinct or which vary in time or space. In this study the properties of two fractions from soils of contrasting geographical origin and under different nutrient management were examined using 13C nuclear magnetic resonance (NMR) spectroscopy. The fractions were free SOM (FR-SOM, discrete organic particles located between stable aggregates), and intra-aggregate SOM (IA-SOM, discrete organic particles within stable aggregates). The composition of both fractions was highly consistent across soil types and environments, but the fractions differed significantly in the proportion of C present in five of the seven functional C groups identified by NMR (P < 0.05). The results confirmed that IA-SOM contains a greater proportion of microbial products and more resistant C as compared with the FR-SOM. Nutrient management affected fraction composition in four functional groups most abundant in plant material or farmyard manure (P < 0.05). The effects were considerably less pronounced when the analysis was restricted to plots receiving inorganic (or zero) N. Overall the results supported the view that free and intra-aggregate organic matter occupy contrasting positions in the decomposition sequence, and are likely to display reactivities sufficiently distinct to operate as discrete pools in new SOM models. MenosCurrent models of soil organic matter (SOM) turnover tend to invoke pools that are defined by their contrasting first-order reactivity constants but which cannot be directly measured. New models may be based around fractions defined by procedures that can be used to isolate them experimentally. The drawback of such fractions is that they may display properties that are not sufficiently distinct or which vary in time or space. In this study the properties of two fractions from soils of contrasting geographical origin and under different nutrient management were examined using 13C nuclear magnetic resonance (NMR) spectroscopy. The fractions were free SOM (FR-SOM, discrete organic particles located between stable aggregates), and intra-aggregate SOM (IA-SOM, discrete organic particles within stable aggregates). The composition of both fractions was highly consistent across soil types and environments, but the fractions differed significantly in the proportion of C present in five of the seven functional C groups identified by NMR (P < 0.05). The results confirmed that IA-SOM contains a greater proportion of microbial products and more resistant C as compared with the FR-SOM. Nutrient management affected fraction composition in four functional groups most abundant in plant material or farmyard manure (P < 0.05). The effects were considerably less pronounced when the analysis was restricted to plots receiving inorganic (or zero) N. Overall the results supported the view that free... Mostrar Tudo |
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Thesagro: |
Matéria Orgânica; Solo. |
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Thesaurus NAL: |
Soil organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02480naa a2200241 a 4500
001 2135459
005 2021-10-20
008 2005 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.2136/sssaj2004.0262$2DOI
100 1 $aSOHI, S. P.
245 $aInvestigating the chemical characteristics of soil organic matter fractions suitable for modeling.$h[electronic resource]
260 $c2005
500 $aNa publicação: Beatá Madari.
520 $aCurrent models of soil organic matter (SOM) turnover tend to invoke pools that are defined by their contrasting first-order reactivity constants but which cannot be directly measured. New models may be based around fractions defined by procedures that can be used to isolate them experimentally. The drawback of such fractions is that they may display properties that are not sufficiently distinct or which vary in time or space. In this study the properties of two fractions from soils of contrasting geographical origin and under different nutrient management were examined using 13C nuclear magnetic resonance (NMR) spectroscopy. The fractions were free SOM (FR-SOM, discrete organic particles located between stable aggregates), and intra-aggregate SOM (IA-SOM, discrete organic particles within stable aggregates). The composition of both fractions was highly consistent across soil types and environments, but the fractions differed significantly in the proportion of C present in five of the seven functional C groups identified by NMR (P < 0.05). The results confirmed that IA-SOM contains a greater proportion of microbial products and more resistant C as compared with the FR-SOM. Nutrient management affected fraction composition in four functional groups most abundant in plant material or farmyard manure (P < 0.05). The effects were considerably less pronounced when the analysis was restricted to plots receiving inorganic (or zero) N. Overall the results supported the view that free and intra-aggregate organic matter occupy contrasting positions in the decomposition sequence, and are likely to display reactivities sufficiently distinct to operate as discrete pools in new SOM models.
650 $aSoil organic matter
650 $aMatéria Orgânica
650 $aSolo
700 1 $aMAHIEU, N.
700 1 $aPOWLSON, D. S.
700 1 $aMADARI, B. E.
700 1 $aSMITTENBERG, R. H.
700 1 $aGAUNT, J. L.
773 $tSoil Science Society of America Journal$gv. 69, n. 4, p. 1248-1255, Jul. 2005.
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