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| 9. |  | BARROS, L. C. de. Projeto piloto de barragens de contenção de águas superficiais de chuvas: um projeto social para colheita de enxurradas. In: CONGRESSO BRASILEIRO DE ECONOMIA E SOCIOLOGIA RURAL, 38.=BRAZILIAN CONGRESS OF RURAL ECONOMY AND SOCIOLOGY, 38.=CONGRESSO MUNDIAL DE SOCIOLOGIA RURAL, 10.=WORLD CONGRESS OF RURAL SOCIOLOGY, 10., 2000, Rio de Janeiro, RJ. A agricultura no limiar do milenio: condicoes de vida rural sustentavel: construindo comunidades, protegendo os recursos naturais, apoiando o desenvolvimento humano-Agriculture on the edge of the millennium: sustainable rural livelihoods: building communities, protecting... [Rio de Janeiro: SOBER, 2000?]. 1 CD-ROM.| Biblioteca(s): Embrapa Milho e Sorgo. |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
26/10/2017 |
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Data da última atualização: |
11/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 3 |
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Autoria: |
VILLANI, F. T.; RIBEIRO, G. A. A.; VILLANI, E. M. de A.; TEIXEIRA, W. G.; MOREIRA, F. M. de S.; MILLER, R.; ALFAIA, S. S. |
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Afiliação: |
FERNANDA TUNES VILLANI, Instituto Federal de Educação, Ciência e Tecnologia, Manaus; GYOVANNI AUGUSTO AGUIAR RIBEIRO, Instituto Federal de Educação, Ciência e Tecnologia, Manaus; ECILA MERCÊS DE ALBUQUERQUE VILLANI, UFV; WENCESLAU GERALDES TEIXEIRA, CNPS; FATIMA MARIA DE SOUZA MOREIRA, UFLA; ROBERT MILLER, United Nations Development Program, Brasília; SONIA SENA ALFAIA, INPA. |
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Título: |
Microbial carbon, mineral-N and soil nutrients in indigenous agroforestry systems and other land use in the upper Solimões Region, Western Amazonas State, Brazil. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Agricultural Sciences, v. 8, n. 7, p. 657-674, Jul. 2017. |
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DOI: |
10.4236/as.2017.87050 |
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Idioma: |
Inglês |
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Conteúdo: |
Slash and burn cultivation systems carried out by many farmers in the Amazon region lead to changes in biogeochemical cycles of nutrients. To assess the extent of the impact of shifting cultivation on the soil in a floodplain portion of this region, samples of an Inceptisol surface layer (0 - 5 cm) under primary forest (FP), secondary forest at an advanced stage of recovery (FS), secondary forest at an initial stage of recovery (CAP), agroforestry (SAF), plantations (RÇ) in indigenous communities and small farmers, and pasture (PAS) in the Upper Solimões region, Amazonas, were subjected to analysis of chemical composition during the wet (May) and dry (October) seasons, 2007. Soils were fertile with levels of P, K, Ca and Mg above those generally found in Amazon soils. Microbial content did not vary significantly in the systems studied in the wet season, but there was a reduction of around 60% with the change of season, except for soils with SAF. Ammonium nitrogen was predominant in all systems and seasons studied. Nitrate content was higher in RÇ soil, in two seasons, and lower in PAS. The type of management adopted by farmers in the regions indigenous agroforestry systems resulted in small changes in P, K, Mg, MBC and mineral-N levels, independent of soil moisture. |
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Palavras-Chave: |
Agricultura tradicional; Florestas primárias e secundárias; Gestão do solo. |
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Thesagro: |
Cambissolo; Pastagem. |
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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/165723/1/2017-032.pdf
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Marc: |
LEADER 02173naa a2200265 a 4500
001 2078246
005 2021-11-11
008 2017 bl uuuu u00u1 u #d
024 7 $a10.4236/as.2017.87050$2DOI
100 1 $aVILLANI, F. T.
245 $aMicrobial carbon, mineral-N and soil nutrients in indigenous agroforestry systems and other land use in the upper Solimões Region, Western Amazonas State, Brazil.$h[electronic resource]
260 $c2017
520 $aSlash and burn cultivation systems carried out by many farmers in the Amazon region lead to changes in biogeochemical cycles of nutrients. To assess the extent of the impact of shifting cultivation on the soil in a floodplain portion of this region, samples of an Inceptisol surface layer (0 - 5 cm) under primary forest (FP), secondary forest at an advanced stage of recovery (FS), secondary forest at an initial stage of recovery (CAP), agroforestry (SAF), plantations (RÇ) in indigenous communities and small farmers, and pasture (PAS) in the Upper Solimões region, Amazonas, were subjected to analysis of chemical composition during the wet (May) and dry (October) seasons, 2007. Soils were fertile with levels of P, K, Ca and Mg above those generally found in Amazon soils. Microbial content did not vary significantly in the systems studied in the wet season, but there was a reduction of around 60% with the change of season, except for soils with SAF. Ammonium nitrogen was predominant in all systems and seasons studied. Nitrate content was higher in RÇ soil, in two seasons, and lower in PAS. The type of management adopted by farmers in the regions indigenous agroforestry systems resulted in small changes in P, K, Mg, MBC and mineral-N levels, independent of soil moisture.
650 $aCambissolo
650 $aPastagem
653 $aAgricultura tradicional
653 $aFlorestas primárias e secundárias
653 $aGestão do solo
700 1 $aRIBEIRO, G. A. A.
700 1 $aVILLANI, E. M. de A.
700 1 $aTEIXEIRA, W. G.
700 1 $aMOREIRA, F. M. de S.
700 1 $aMILLER, R.
700 1 $aALFAIA, S. S.
773 $tAgricultural Sciences$gv. 8, n. 7, p. 657-674, Jul. 2017.
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