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| Registros recuperados : 130 | |
| 61. |  | SILVA, A. B. da; MARCHI, G.; SILVA, O. D. D. da; GUILHERME, L. R. G. Etrace express: programa para análise de risco de elementos-traço em fertilizantes inorgânicos. In: ENCONTRO DE JOVENS TALENTOS DA EMBRAPA CERRADOS, 4., 2009, Planaltina, DF. Resumos apresentados... Planaltina, DF: Embrapa Cerrados, 2009. p. 31-32 (Embrapa Cerrados. Documentos, 243).| Biblioteca(s): Embrapa Cerrados. |
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| 62. | | MARCHI, G.; GUILHERME, L. R. G.; SILVA, A. B. DA; SILVA, O. D. D. da. Etrace Express: software for risk analysis of trace elements in inorganic fertilizers post application. In: WORLD CONGRESS OF SOIL SCIENCE, 19., 2010, Brisbane. Soil solutions for a changing world. Brisbane: International Union of Soil Science: ASSSI, 2010. 1 CD-ROM. GIKES, R. J.; PRAKONGKEP, N. (Ed.).| Biblioteca(s): Embrapa Cerrados. |
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| 63. | | GUELFI-SILVA, D. R.; MARCHI, G.; SPEHAR, C. R.; GUILHERME, L. R. G.; FAQUIN, V. Eficiência agronômica da adubação potássica na alface adubada com fontes alternativas de nutrientes. Revista Ciência Agronômica, Fortaleza, v. 44, n. 2, p. 267-277, jun. 2013.| Biblioteca(s): Embrapa Cerrados. |
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| 68. | | FIALHO, A. R.; NIVA, C. C.; OLIVEIRA, M. I.; MARCHI, G.; MARTINS, E. de S. Efeito de agrominerais incorporados ao solo sobre a sobrevivência e reprodução de enquitreídeos. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA CERRADOS. Jovens talentos 2016: resumos. Planaltina, DF: Embrapa Cerrados, 2016. p. 58 (Embrapa Cerrados. Documentos, 334). Comissão organizadora: SOUZA, K. W. de; FALEIRO, A. S. G.; SALGUES, A. L. M.; ALONSO, A. M.; CARVALHO, A. M. de; LOBATO, B. R.; CRUZ, C. V.; SOUSA, E. dos S.; PELEGRINELLI, F.; SOARES, J. P. G.; LIMA, J. E. F. W.; ARBUES, J. F. de O.;...| Biblioteca(s): Embrapa Cerrados. |
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| 69. | | IKEDA, F. S.; MARCHI, G.; MARCHAO, R. L.; VICTORIA FILHO, R. Doses reduzidas de glyphosate em três estádios de desenvolvimento de Urochloa ruzizensis (R. Germ. & C.M. Evrard) Morrone & Zuloaga In: CONGRESSO DE LA ASOCIACIÓN LATINOAMERICANA DE MALEZAS, 21.,; CONGRESO MEXICANO DE LA CIENCIA DE LA MALEZA, 34.,; SIMPOSIO INTERNACIONAL DE RESISTENCIA Y TOLERANCIA A HERBICIDAS, 1.,; SIMPOSIO INTERNACIONAL DE MALEZA ACUÁTICA, 9., 2013, Cancún, México. Memória... Cancún, QR: ALAM, 2013.| Biblioteca(s): Embrapa Agrossilvipastoril. |
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| 71. | | IKEDA, F. S.; VICTORIA FILHO, R.; MARCHI, G.; DIAS, C. T. dos S.; PELISSARI, A. Interferências no consórcio de milho com Urochloa spp. Ciência Rural, Santa Maria, RS, v. 43, n. 10, p.1763-1770, out. 2013.| Biblioteca(s): Embrapa Cerrados. |
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| 72. | | IKEDA, F. S.; VICTORIA FILHO, R.; MARCHI, G.; DIAS, C. T. dos S.; PELISSARI, A. Interferências no consórcio de milho com Urochloa spp Ciência Rural, Santa Maria , v. 43, n. 10, p. 1763-1770, Out. 2013 43 1763-1770| Biblioteca(s): Embrapa Agrossilvipastoril. |
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| 73. | | MARCHI, E. C. S.; MARCHI, G.; SILVA, C. A.; DIAS, B. de O.; ALVARENGA, M. A. Lettuce growth characteristics as affected by fertilizers, liming, and a soil conditioner. Journal of Horticulture and Forestry, v. 7, n. 3, p. 65-72, 2015. p. 65-72| Biblioteca(s): Embrapa Cerrados. |
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| 75. | | PIRES, A. M. M.; MATTIAZZO, M. E.; GUILHERME, L. R. G.; MARCHI, G. Organic acids and biosolid trace elements phytoavailability. In: INTERNATIONAL CONFERENCE ON THE BIOGEOCHEMISTRY OF TRACE ELEMENTS, 8., 2005, Adelaide, Australia. Conference proceedings… Adelaide, Australia: ICOBTE, 2005. p. 1-2.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 76. | | PIRES, A. M. M.; MARCHI, G.; MATTIAZZO, M. E.; GUILHERME, L. R. G. Organic acids in the rhizosphere and phytoavailability of sewage sludge-borne trace elements. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 42, n. 7, p. 917-924, 2007.| Biblioteca(s): Embrapa Cerrados; Embrapa Meio Ambiente; Embrapa Unidades Centrais. |
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| 77. | | IKEDA, F. S.; BOTTI, F.; MARCHI, G.; VICTORIA FILHO, R.; GOMES, I. A. C. Potencial alelopático de cultivares de Urochloa spp. em diferentes estádios de desenvolvimento. IN: SIMPÓSIO DA AMAZÔNIA MERIDIONAL EM CIÊNCIAS AMBIENTAIS, 5., 2012, Sinop, MT. Anais... Sinop: V Simpósio da Amazônia Meridional em Ciências Ambientais, UFMT, 2012.| Biblioteca(s): Embrapa Agrossilvipastoril. |
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| 80. | | MARTINS, V.; GONÇALVES, A. S. F.; MARCHI, G.; GUILHERME, L. R. G.; MARTINS, E. de S. Solubilização de potássio em misturas de verdete e calcário tratadas termoquimicamente. Pesquisa Agropecuária Tropical, Goiânia, v. 45, n. 1, p. 66-72, jan./mar. 2015.| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 130 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
08/01/2013 |
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Data da última atualização: |
11/01/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
MARCHI, G.; SILVA, V. A.; GUILHERME, L. R. G.; LIMA, J. M.; NOGUEIRA, F. D.; GUIMARÃES, P. T. G. |
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Afiliação: |
GIULIANO MARCHI, CPAC; VLADIMIR ANTÔNIO SILVA, UFLA; LUIZ ROBERTO GUIMARÃES GUILHERME, UFLA; JOSÉ MARIA LIMA, UFLA; FRANCISCO DIAS NOGUEIRA, EPAMIG; PAULO TÁCITO GONTIJO GUIMARÃES, EPAMIG. |
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Título: |
Potassium extractability from soils of brazilian coffee regions. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Bioscience Journal, Uberlândia, MG, v. 28, n. 6, p. 913-919, nov./dez. 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Coffee, which is an important commodity for Brazil, is a highly K-demanding crop. Methods for recommending K fertilization to coffee crops in Brazil are based on the amount of exchangeable K. Mineralogical studies estimating K supply capacity from different soil fractions, from medium to long term, were performed in Brazilian soils, but very few studies have been carried out focusing on the use of successive chemical extractions. This study evaluated K release from whole soil, as well as clay, silt, and sand fractions of B-horizon samples of a basalt-derived Oxisol and a sienite-derived Ultisol, both representative soils from coffee regions of Minas Gerais State. Successive extractions (0 to 665 h) of K were performed with 10-3 mol L-1 of either citrate or oxalate at 1:10 solid:solution ratio. The cumulative results were compared with forms of K (exchangeable, non-exchangeable, and total) as measured by different extraction procedures. The results showed that exchangeable K was higher, and non-exchangeable as well as total K were lower in the whole soil fraction of the Oxisol, than the K forms extracted from the Ultisol. The clay fraction was the main source of K in the Oxisol whereas the silt fraction contributed most for K supply in the Ultisol. Citrate and oxalate extracted similar amounts of K from the Oxisol, which is probably related to the fact that most of its K supply came from the exchangeable form. Citrate caused a greater release of K (part of which being from the non-exchangeable form) from the Ultisol than did oxalate. This work showed that soil texture alone is not a good indicator of K supply capacity, since for the same particle size, the studied soils revealed different K extractability. MenosCoffee, which is an important commodity for Brazil, is a highly K-demanding crop. Methods for recommending K fertilization to coffee crops in Brazil are based on the amount of exchangeable K. Mineralogical studies estimating K supply capacity from different soil fractions, from medium to long term, were performed in Brazilian soils, but very few studies have been carried out focusing on the use of successive chemical extractions. This study evaluated K release from whole soil, as well as clay, silt, and sand fractions of B-horizon samples of a basalt-derived Oxisol and a sienite-derived Ultisol, both representative soils from coffee regions of Minas Gerais State. Successive extractions (0 to 665 h) of K were performed with 10-3 mol L-1 of either citrate or oxalate at 1:10 solid:solution ratio. The cumulative results were compared with forms of K (exchangeable, non-exchangeable, and total) as measured by different extraction procedures. The results showed that exchangeable K was higher, and non-exchangeable as well as total K were lower in the whole soil fraction of the Oxisol, than the K forms extracted from the Ultisol. The clay fraction was the main source of K in the Oxisol whereas the silt fraction contributed most for K supply in the Ultisol. Citrate and oxalate extracted similar amounts of K from the Oxisol, which is probably related to the fact that most of its K supply came from the exchangeable form. Citrate caused a greater release of K (part of which being from th... Mostrar Tudo |
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Thesagro: |
Café; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02301naa a2200205 a 4500
001 1944331
005 2013-01-11
008 2012 bl uuuu u00u1 u #d
100 1 $aMARCHI, G.
245 $aPotassium extractability from soils of brazilian coffee regions.
260 $c2012
520 $aCoffee, which is an important commodity for Brazil, is a highly K-demanding crop. Methods for recommending K fertilization to coffee crops in Brazil are based on the amount of exchangeable K. Mineralogical studies estimating K supply capacity from different soil fractions, from medium to long term, were performed in Brazilian soils, but very few studies have been carried out focusing on the use of successive chemical extractions. This study evaluated K release from whole soil, as well as clay, silt, and sand fractions of B-horizon samples of a basalt-derived Oxisol and a sienite-derived Ultisol, both representative soils from coffee regions of Minas Gerais State. Successive extractions (0 to 665 h) of K were performed with 10-3 mol L-1 of either citrate or oxalate at 1:10 solid:solution ratio. The cumulative results were compared with forms of K (exchangeable, non-exchangeable, and total) as measured by different extraction procedures. The results showed that exchangeable K was higher, and non-exchangeable as well as total K were lower in the whole soil fraction of the Oxisol, than the K forms extracted from the Ultisol. The clay fraction was the main source of K in the Oxisol whereas the silt fraction contributed most for K supply in the Ultisol. Citrate and oxalate extracted similar amounts of K from the Oxisol, which is probably related to the fact that most of its K supply came from the exchangeable form. Citrate caused a greater release of K (part of which being from the non-exchangeable form) from the Ultisol than did oxalate. This work showed that soil texture alone is not a good indicator of K supply capacity, since for the same particle size, the studied soils revealed different K extractability.
650 $aCafé
650 $aSolo
700 1 $aSILVA, V. A.
700 1 $aGUILHERME, L. R. G.
700 1 $aLIMA, J. M.
700 1 $aNOGUEIRA, F. D.
700 1 $aGUIMARÃES, P. T. G.
773 $tBioscience Journal, Uberlândia, MG$gv. 28, n. 6, p. 913-919, nov./dez. 2012.
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