| |
|
|
| Registros recuperados : 193 | |
| 81. |  | CORSI, M.; MARTHA JUNIOR, G. B.; NASCIMENTO JUNIOR, D.; BALSALOBRE, M. A. A. Impact of grazing management on productivity of tropical grasslands. In: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, São Pedro, SP. Grassland ecosystems: an outlook into the 21st century: proceedings. Brasília, DF: Sociedade Brasileira de Zootecnia; Piracicaba: FEALQ, 2001. p. 801-806.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
|   |
| 89. | | CONTINI, E.; MARTHA JUNIOR, G. B.; GASQUES, J. G.; VIEIRA JUNIOR, P. A. O papel das políticas públicas no Cerrado. In: BOLFE, E. L.; SANO, E. E.; CAMPOS, S. K. (Ed.). Dinâmica agrícola no cerrado: análises e projeções. Brasília, DF: Embrapa, 2020. v. 1, cap. 3, p. 59-88.| Biblioteca(s): Embrapa Agricultura Digital; Embrapa Unidades Centrais. |
|  |
| 91. | | VILELA, L.; MARTHA JUNIOR, G. B.; SOUSA, D. M. G. de. Enxofre na produção de Panicum maximum cv. Tanzânia. In: MOSTRA DE RESULTADOS DE PESQUISA DOS PROJETOS FINALIZADOS EM 2006 E 2007, 2., 2009, Planaltina, DF. [Anais...]. Planaltina, DF: Embrapa Cerrados, 2009. p. 35-41. (Embrapa Cerrados. Documentos, 244). Editores técnicos Eduardo Cyrino de Oliveira-Filho, Fernando Antônio Macena da Silva, Maria Lucia Meirelles, Eduardo Alano Vieira, Geraldo Bueno Martha Junior, Arminda Moreira de Carvalho, José Carlos Sousa e Silva, CPAC.| Biblioteca(s): Embrapa Cerrados. |
| |
| 98. | | MARTHA JUNIOR, G. B.; VILELA, L.; SOUSA, D. M. G. de. Efeito da adubação de manutenção com fontes de fósforo e de nitrogênio sobre a produção de Brachiaria brizantha cv. Marandu na região do cerrado. In: MOSTRA DE RESULTADOS DE PESQUISA DOS PROJETOS FINALIZADOS EM 2006 E 2007, 2., 2009, Planaltina, DF. [Anais...]. Planaltina, DF: Embrapa Cerrados, 2009. p. 53-60. (Embrapa Cerrados. Documentos, 244). Editores técnicos Eduardo Cyrino de Oliveira-Filho, Fernando Antônio Macena da Silva, Maria Lucia Meirelles, Eduardo Alano Vieira, Geraldo Bueno Martha Junior, Arminda Moreira de Carvalho, José Carlos Sousa e Silva, CPAC.| Biblioteca(s): Embrapa Cerrados. |
| |
| Registros recuperados : 193 | |
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Arroz e Feijão. |
|
Data corrente: |
15/04/2015 |
|
Data da última atualização: |
07/03/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
|
Autoria: |
CARVALHO, A. M. de; MARCHAO, R. L.; BUSTAMANTE, M. M. da C.; ALCANTARA, F. A. de; COSER, T. R. |
|
Afiliação: |
ARMINDA MOREIRA DE CARVALHO, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; MERCEDES MARIA DA CUNHA BUSTAMANTE; FLAVIA APARECIDA DE ALCANTARA, CNPAF; THAIS RODRIGUES COSER. |
|
Título: |
Characterization of cover crops by NMR spectroscopy: impacts on soil carbon, nitrogen and phosphorus under tilage regimes. |
|
Ano de publicação: |
2014 |
|
Fonte/Imprenta: |
Revista Ciência Agronômica, v. 45, n. 5, p. 968-975, 2014. |
|
ISSN: |
1806-6690 |
|
Idioma: |
Inglês |
|
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 |
|
Palavras-Chave: |
Latossolo Vermelho-Amarelo; Ressonância magnetica nuclear. |
|
Thesagro: |
Carbono; Cerrado; Matéria Orgânica; Planta de Cobertura. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/122351/1/rca.pdf
|
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
