Data/hora: 19/06/2024 15:59:21

Biblioteca(s): | Embrapa Soja; Embrapa Suínos e Aves.
Data corrente: | 09/07/2013
Data da última atualização: | 02/10/2013
Autoria: | SOUZA, R. C.; CANTAO, M. E.; VASCONCELOS, A. T. R.; NOGUEIRA, M. A.; HUNGRIA, M.
Afiliação: | RENATA CAROLINI SOUZA, UEL; MAURICIO EGIDIO CANTAO, CNPSA; ANA TEREZA RIBEIRO VASCONCELOS, LNCC; MARCO ANTONIO NOGUEIRA, CNPSO; MARIANGELA HUNGRIA DA CUNHA, CNPSO.
Título: | Soil metagenomics reveals differences under conventional and no-tillage with crop rotation or succession.
Ano de publicação: | 2013
Fonte/Imprenta: | Applied Soil Ecology, v. 72, p. 49-61, Oct. 2013.
DOI: | 10.1016/j.apsoil.2013.05.021
Idioma: | Inglês
Conteúdo: | Soil conservation practices are critical for agricultural sustainability, and in this study the shotgunsequencing approach was used to investigate the effects on soil biodiversity of different soil- andcrop-management practices in a 13-year field trial in southern Brazil. Treatments consisted of conven-tional tillage (CT) with plowing and disking, or no-tillage (NT) with direct sowing into the residues ofprevious crops, in a crop succession [soybean (summer)/wheat (winter)] or rotation [soybean/maize(summer)/wheat/lupine/oat (winter)]. About 1 million reads per treatment revealed very high levels ofdiversity. The majority of the sequences were attributed to the Bacteria (54%), and 0.3% and 0.2% fittedinto Archaea and Eucarya domains, respectively; 46% showed no similarity with any known sequences.Major differences were associated with tillage and, to a lesser extent, with crop management. Statisticallysignificant higher abundances with CT encompassed microorganisms associated with residue decompo-sition, carbon and nitrogen cycling, and xenobiosis. Eucarya were also more abundant with CT, possiblyrelated to higher tolerance of environmental stresses. In contrast, NT showed higher abundances par-ticularly of nitrogen-fixing Rhizobiales and Archaea that inhabit environments rich in organic matter.
Palavras-Chave: | Solos.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/85755/1/soil.meta.pdf
Registro original: | Embrapa Suínos e Aves (CNPSA)

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