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| Barberena,Iara Magalhães; Espindula,Marcelo Curitiba; Araújo,Larissa Fatarelli Bento de; Marcolan,Alaerto Luiz. |
| Abstract: The objective of this work was to evaluate urease inhibitors for the reduction of ammonia volatilization in Amazonian soils. The work was carried out on a clayey yellow Oxisol, a clayey red Oxisol, and on a light silty Ultisol. Each experiment was conducted in split plots, using standard urea, urea + a benzimidazole-type urease inhibitor (BZI1), urea + a benzoylthiourea-type urease inhibitor (RTB68), urea + N-(n-butyl) triamide thiophosphate (NBPT), or a fertilizer-free control. Volatilized ammonia was collected at 48, 96, 144, 192, 240, 288, 336, and 384 hours after fertilization. Ammonia volatilization reached a maximum at 144 hours in the urea, urea + benzimidazole, and urea + benzoylthiourea treatments. A peak level was reached at 192 and 288... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Benzimidazole; Benzoylthiourea; Oxisol; Plinthosol; Urease inhibitors. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103800 |
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| Garcia,Cira Hortensia Pérez; Lima,Hedinaldo Narciso; Silva,Francisco Weliton Rocha; Neves Junior,Afrânio Ferreira; Teixeira,Wenceslau Geraldes; Macedo,Rodrigo Santana; Tavares,Sérgio Guimarães. |
| Large areas of Plinthosols with ferruginous materials such as plinthite and/or petroplinthite are fairly common in the Brazilian Amazon basin. This work was carried out to investigate the chemical behavior, mineralogical composition and weathering stage of four representative soil profiles with plinthite and petroplinthite, in Iranduba, AM (Central Amazon). Three well-drained soil profiles at high elevations were studied (P1, Plinthic Vetic Ferralsol; P2 and P3, Vetic Endopetric Plinthosol) and a contrasting poorly drained soil (P4 Haplic Plinthosol), located at low elevation. After profile descriptions, soil samples were collected from each horizon, air-dried, sieved (2 mm), and analyzed for particle-size distribution, pH, exchangeable cations (Al3+,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plinthosol; Soil fertility; XRD; Weathering degree; Central Amazon. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400011 |
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