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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
15/04/2015 |
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Data da última atualização: |
07/03/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CARVALHO, A. M. de; MARCHAO, R. L.; BUSTAMANTE, M. M. da C.; ALCANTARA, F. A. de; COSER, T. R. |
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Afiliação: |
ARMINDA MOREIRA DE CARVALHO, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; MERCEDES MARIA DA CUNHA BUSTAMANTE; FLAVIA APARECIDA DE ALCANTARA, CNPAF; THAIS RODRIGUES COSER. |
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Título: |
Characterization of cover crops by NMR spectroscopy: impacts on soil carbon, nitrogen and phosphorus under tilage regimes. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Revista Ciência Agronômica, v. 45, n. 5, p. 968-975, 2014. |
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ISSN: |
1806-6690 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox. Cover crops (Crotalaria juncea, Canavalia brasiliensis, Cajanus cajan, Mucuna pruriens and Raphanus sativus) and natural fallow were studied in rotation with maize under conventional and no-tillage regimes. Tissues of Crotalaria juncea, Canavalia brasiliensis, Mucuna pruriens and Raphanus sativus were analyzed using CPMAS 13C NMR spectroscopy. Soil samples were collected at the end of the growing season of the cover crops (September 2002) and during the grain filling period in corn from 0-5 and 5-10 cm layers. Cajanus cajan presented the lowest content of polysaccharides and along with Mucuna pruriens presented the highest percentage of aromatic carbon compounds, reflecting the slow decomposition of highly lignified material. Carbon stocks were higher in the superficial soil layer and under no-tillage due to the accumulation and slower decomposition of plant tissues under these conditions. Increases in the C/N ratio of the soil with Mucuna pruriens and the C/P ratio with Cajanus cajan in the dry season were also related to slower rates of decomposition, caused by the large concentration of aromatic compounds in the tissues of these species. The higher C/P ratios found at 0-5 cm layer are due to higher values of P (Mehlich-1) at 5-10 cm (25 mg kg-1) layer and the higher concentration of carbon in the superficial soil layer as a result of the accumulation of plant residues. MenosThe objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox. Cover crops (Crotalaria juncea, Canavalia brasiliensis, Cajanus cajan, Mucuna pruriens and Raphanus sativus) and natural fallow were studied in rotation with maize under conventional and no-tillage regimes. Tissues of Crotalaria juncea, Canavalia brasiliensis, Mucuna pruriens and Raphanus sativus were analyzed using CPMAS 13C NMR spectroscopy. Soil samples were collected at the end of the growing season of the cover crops (September 2002) and during the grain filling period in corn from 0-5 and 5-10 cm layers. Cajanus cajan presented the lowest content of polysaccharides and along with Mucuna pruriens presented the highest percentage of aromatic carbon compounds, reflecting the slow decomposition of highly lignified material. Carbon stocks were higher in the superficial soil layer and under no-tillage due to the accumulation and slower decomposition of plant tissues under these conditions. Increases in the C/N ratio of the soil with Mucuna pruriens and the C/P ratio with Cajanus cajan in the dry season were also related to slower rates of decomposition, caused by the large concentration of aromatic compounds in the tissues of these species. The higher C/P ratios found at 0-5 cm layer are due to higher values of P (Mehlich-1) at 5-10 cm (25 mg kg-1) layer and the higher concentr... Mostrar Tudo |
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Palavras-Chave: |
Latossolo Vermelho-Amarelo; Ressonância magnetica nuclear. |
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Thesagro: |
Carbono; Cerrado; Matéria Orgânica; Planta de Cobertura. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/122351/1/rca.pdf
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Marc: |
LEADER 02400naa a2200253 a 4500
001 2013554
005 2024-03-07
008 2014 bl uuuu u00u1 u #d
022 $a1806-6690
100 1 $aCARVALHO, A. M. de
245 $aCharacterization of cover crops by NMR spectroscopy$bimpacts on soil carbon, nitrogen and phosphorus under tilage regimes.$h[electronic resource]
260 $c2014
520 $aThe objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox. Cover crops (Crotalaria juncea, Canavalia brasiliensis, Cajanus cajan, Mucuna pruriens and Raphanus sativus) and natural fallow were studied in rotation with maize under conventional and no-tillage regimes. Tissues of Crotalaria juncea, Canavalia brasiliensis, Mucuna pruriens and Raphanus sativus were analyzed using CPMAS 13C NMR spectroscopy. Soil samples were collected at the end of the growing season of the cover crops (September 2002) and during the grain filling period in corn from 0-5 and 5-10 cm layers. Cajanus cajan presented the lowest content of polysaccharides and along with Mucuna pruriens presented the highest percentage of aromatic carbon compounds, reflecting the slow decomposition of highly lignified material. Carbon stocks were higher in the superficial soil layer and under no-tillage due to the accumulation and slower decomposition of plant tissues under these conditions. Increases in the C/N ratio of the soil with Mucuna pruriens and the C/P ratio with Cajanus cajan in the dry season were also related to slower rates of decomposition, caused by the large concentration of aromatic compounds in the tissues of these species. The higher C/P ratios found at 0-5 cm layer are due to higher values of P (Mehlich-1) at 5-10 cm (25 mg kg-1) layer and the higher concentration of carbon in the superficial soil layer as a result of the accumulation of plant residues.
650 $aCarbono
650 $aCerrado
650 $aMatéria Orgânica
650 $aPlanta de Cobertura
653 $aLatossolo Vermelho-Amarelo
653 $aRessonância magnetica nuclear
700 1 $aMARCHAO, R. L.
700 1 $aBUSTAMANTE, M. M. da C.
700 1 $aALCANTARA, F. A. de
700 1 $aCOSER, T. R.
773 $tRevista Ciência Agronômica$gv. 45, n. 5, p. 968-975, 2014.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
03/11/2017 |
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Data da última atualização: |
07/11/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
MELO, I. S. de; VALARINI, P. J.; ÁVILA, L. A; NASCIMENTO, R. dos S. |
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Afiliação: |
ITAMAR SOARES DE MELO, CNPMA; PEDRO JOSE VALARINI, CNPMA; LUCIANA APARECIDA ALVES, PUC/CAMPINAS; ROSELY DOS SANTOS NASCIMENTO, CNPMA. |
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Título: |
Colonização de raízes por rizobactérias promotoras de crescimento do tomateiro e antagônicas a Pythium aphanidermatum e Rhizoctonia solani. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Fitopatologia Brasileira, Brasília, v. 29, p. 214, ago. 2004. Suplemento. R 702. Edição de Resumos do 37 Congresso Brasileiro de Fitopatologia, ago. 2004. |
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Idioma: |
Português |
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Palavras-Chave: |
Colonização radicular; Desenvolvimento; Microscopia eletrônica de varredura; Planta antagônica; Planta promotora de crescimento; Rizobactéria. |
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Thesagro: |
Lycopersicon Esculentum; Pythium Aphanidermatum; Rhizoctonia Solani; Tomate. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/166083/1/2004SP-81-Melo-Colonizacao-15829.pdf
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Marc: |
LEADER 00991nam a2200253 a 4500
001 2078865
005 2017-11-07
008 2004 bl uuuu u00u1 u #d
100 1 $aMELO, I. S. de
245 $aColonização de raízes por rizobactérias promotoras de crescimento do tomateiro e antagônicas a Pythium aphanidermatum e Rhizoctonia solani.$h[electronic resource]
260 $aFitopatologia Brasileira, Brasília, v. 29, p. 214, ago. 2004. Suplemento. R 702. Edição de Resumos do 37 Congresso Brasileiro de Fitopatologia, ago. 2004.$c2004
650 $aLycopersicon Esculentum
650 $aPythium Aphanidermatum
650 $aRhizoctonia Solani
650 $aTomate
653 $aColonização radicular
653 $aDesenvolvimento
653 $aMicroscopia eletrônica de varredura
653 $aPlanta antagônica
653 $aPlanta promotora de crescimento
653 $aRizobactéria
700 1 $aVALARINI, P. J.
700 1 $aÁVILA, L. A
700 1 $aNASCIMENTO, R. dos S.
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Embrapa Meio Ambiente (CNPMA) |
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