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Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
07/02/2011 |
Data da última atualização: |
07/02/2011 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
ROSA, S. L.; VALLE, C. B. do; RESENDE, R. M. S. |
Afiliação: |
Graduanda de Agronomia da Uniderp/Anhanguera, Bolsista PIBIC na Embrapa Gado de Corte; CACILDA BORGES DO VALLE, CNPGC; ROSANGELA MARIA SIMEAO RESENDE, CNPGC. |
Título: |
Seleção de híbridos de Brachiaria humidicola com base na produtividade sob cortes. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
In: JORNADA CIENTÍFICA DA EMBRAPA GADO DE CORTE,5., 2009, Campo Grande, MS. [Anais da ...]. Campo Grande, MS: Embrapa Gado de Corte, 2009. |
Páginas: |
1 p. |
Idioma: |
Português |
Conteúdo: |
Neste projeto tem-se por objetivo selecionar os melhores híbridos de B. humidicola por meio de cortes em pequenas parcelas. |
Thesagro: |
Brachiaria Humidicola; Melhoramento Genético Vegetal; Pastagem. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/26535/1/SELECAO-DE-HIBRIDOS-DE-Brachiaria-humidicola-COM-BASE-NA-PRODUTIVIDADE.pdf
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Marc: |
LEADER 00768nam a2200181 a 4500 001 1876051 005 2011-02-07 008 2009 bl uuuu u00u1 u #d 100 1 $aROSA, S. L. 245 $aSeleção de híbridos de Brachiaria humidicola com base na produtividade sob cortes.$h[electronic resource] 260 $aIn: JORNADA CIENTÍFICA DA EMBRAPA GADO DE CORTE,5., 2009, Campo Grande, MS. [Anais da ...]. Campo Grande, MS: Embrapa Gado de Corte$c2009 300 $a1 p. 520 $aNeste projeto tem-se por objetivo selecionar os melhores híbridos de B. humidicola por meio de cortes em pequenas parcelas. 650 $aBrachiaria Humidicola 650 $aMelhoramento Genético Vegetal 650 $aPastagem 700 1 $aVALLE, C. B. do 700 1 $aRESENDE, R. M. S.
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Embrapa Gado de Corte (CNPGC) |
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Registro Completo
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
20/10/2021 |
Data da última atualização: |
20/10/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SOHI, S. P.; MAHIEU, N.; POWLSON, D. S.; MADARI, B. E.; SMITTENBERG, R. H.; GAUNT, J. L. |
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. |
Título: |
Investigating the chemical characteristics of soil organic matter fractions suitable for modeling. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
Soil Science Society of America Journal, v. 69, n. 4, p. 1248-1255, Jul. 2005. |
DOI: |
https://doi.org/10.2136/sssaj2004.0262 |
Idioma: |
Inglês |
Notas: |
Na publicação: Beatá Madari. |
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 |
Thesagro: |
Matéria Orgânica; Solo. |
Thesaurus NAL: |
Soil organic matter. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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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