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| Registros recuperados: 42 | |
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| Balam Che, Manuel Anastacio. |
| Se ensayaron niveles de fertilización de N,P,K, en Teca (Tectona grandis Linn F.) con un experimento establecido en 2009, en el municipio de Balancán Tabasco. Se probaron tres niveles de cada factor N, P y K generando 27 combinaciones de un experimento factorial y los tratamientos se distribuyeron en un diseño de bloques al azar. En forma paralela se establecieron parcelas aledañas para probar el efecto de la aplicación de micronutrientes. Los niveles de fertilización se identificaron como medios, si correspondían a la dosis aplicada previamente a otras plantaciones y, altos y bajos según se encontraran 50% arriba y debajo de esta dosis. Las variables de respuesta fueron los incrementos de 2010 a 2012, en diámetro y área basal a nivel del suelo, altura... |
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Palavras-chave: Plantaciones tropicales; Suelos tropicales; Crecimiento inicial; Tropical plantations; Tropical soils; Initial tree growth; Forestal; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1859 |
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| Maia,Felipe C. de O.; Bufon,Vinicius B.; Leão,Tairone P.. |
| ABSTRACT Water stored in the soil between field capacity and the permanent wilting point, is known as the available water capacity. Its availability to be effectively used by plants depends on the type of soil and its water retention characteristics. The aim of this work was to compile information about water retention curves in Latosols, and to provide a first approximation of values and most likely amplitudes for water storage and available water capacity of these soils. The database was constituted from information collected from articles, theses, dissertations and other publications. Soil water retention curves, as well as available water, were estimated for the order Latosols, and for the suborders Red Latosol (RL), Red-Yellow Latosol (RYL) and Yellow... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Field capacity; Permanent wilting point; Van Genuchten; Tropical soils. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400546 |
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| CALDERANO FILHO, B.; MANZATTO, C. V.; ANDRADE, A. G. de; DONAGEMMA, G. K.; CALDERANO, S. B.; SOUZA, J. S. de; PEREIRA, L. A.; MIRANDA, E. A.; MELLO, J. B. de; COSTA, M. R. da. |
| O objetivo do trabalho foi realizar o estudo dos solos dos reassentamentos rurais da usina hidrelétrica de Manso, no Município de Chapada dos Guimarães, visando proceder à identificação, caracterização e cartografia dos solos. Os procedimentos utilizados consistiram na delimitação dos principais domínios e/ou padrões fisiográficos, a partir da fotointerpretação de fotografias aéreas, de dados de sensores remotos e do modelo digital de elevação (MDE), principalmente dos dados de altimetria e de declividade. Esse material apoiou a prospecção e cartografia dos solos no campo e verificação dos limites entre as unidades de mapeamento. No domínio das terras baixas, foram identificados Neossolos Quartzarênicos Hidromórficos, Plintossolos Háplicos Distróficos e... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Erosão do Solo; Manejo do Solo; Solo Tropical; Soil erosion; Soil management; Tropical soils. |
| Ano: 2006 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1114040 |
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| SANTOS, H. G. dos; JACOMINE, P. K. T.; ANJOS, L. H. C. dos; LUMBRERAS, J. F.; OLIVEIRA, J. B. de; OLIVEIRA, V. A. de; COELHO, M. R.; ALMEIDA, J. A. de; CUNHA, T. J. F. da. |
| O Sistema Brasileiro de Classificação de Solos (SiBCS), publicado originalmente em 1999, está em constante aperfeiçoamento. A mola propulsora para tal são as ideias e propostas emanadas das reuniões técnicas de classificação e correlação de solos, conhecidas como RCCs (Reunião de Classificação e Correlação de Solos), juntamente com as numerosas sugestões enviadas por usuários do SiBCS ao Comitê Executivo Nacional de Classificação de Solos, sob coordenação da Embrapa Solos. As sugestões são discutidas, avaliadas e consolidadas no âmbito do referido Comitê em reuniões presenciais e discussões via internet. O presente trabalho é resultado dessa trajetória de evolução do conhecimento dos solos brasileiros e da organização estrutural da comunidade pedológica... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Classe de solo; Solos tropical.; Solo; Taxonomia.; Soil taxonomy; Tropical soils. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/664470 |
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| CALDERANO FILHO, B.; ANDRADE, A. G. de; MANZATTO, C. V.; CALDERANO, S. B.; SOUZA, J. S. de. |
| O objetivo do trabalho foi realizar o estudo dos solos da área de entorno do reservatório da usina hidrelétrica de Tombos, Estado de Minas Gerais, visando proceder à identificação, caracterização e cartografia dos solos. Os procedimentos utilizados consistiram na delimitação dos principais domínios e/ou padrões fisiográficos, a partir da fotointerpretação de fotografias aéreas, de dados de sensores remotos e do modelo digital de elevação (MDE), principalmente dos dados de altimetria e de declividade. Esse material apoiou a prospecção e cartografia dos solos no campo e verificação dos limites entre as unidades de mapeamento. No domínio das terras altas, foram identificados Argissolos Vermelhos, Vermelho-Amarelos e eventualmente Amarelos, restritos às partes... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Reassentamentos rurais; Modelo digital de elevação; Relações solo-paisagem; Solo Tropical; Classificação do Solo; Tropical soils; Soil classification. |
| Ano: 2006 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1091714 |
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| CARVALHO FILHO, A. de; NAIME, U. J.; MOTTA, P. E. F. da; SILVA NETO, L. de F. da; OLIVEIRA, A. P. de; LUMBRERAS, J. F.; CALDERANO, S. B.; SIMÃO, M. L. R.; AGLIO, M. L. D.; VIEIRA, E. M.; MACHADO, M. L.; SOUZA, J. S. de; SANTOS, A. J. R. dos; SILVA, D. C. da; FERREIRA, A. R.. |
| Com o objetivo de prover informações sobre os recursos de solos da área de expansão do Projeto de Irrigação do Jaíba, referente à Etapa IV, que abrange 17.275 ha, como subsídio à futura implantação da infraestrutura de irrigação e ao adequado planejamento e monitoramento das atividades agrossilvipastoris e de preservação ambiental, foi realizado o levantamento pedológico semidetalhado, na escala 1:50.000, conforme as normas preconizadas pela Embrapa. A região é caracterizada por temperaturas médias elevadas, precipitações abaixo dos 900 mm anuais, e deficiência hídrica anual de 450 a 500 mm, acumulada entre os meses de fevereiro e outubro, evidenciando o curto período favorável ao crescimento das plantas em sequeiro. O ambiente seco também é evidenciado... |
| Tipo: Livros |
Palavras-chave: Reconhecimento do Solo; Recurso Mineral; Solo Tropical; Aptidão Agrícola; Gênese do Solo; Mineralogia; Soil surveys; Soil formation; Soil mineralogy; Tropical soils; Land evaluation. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1138131 |
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| ALLEONI,LUÍS REYNALDO FERRACCIÚ; CAMARGO,OTÁVIO ANTONIO DE. |
| Boron adsorption was studied in five representative soils (Rhodic Hapludox, Arenic Paleudalf and three Typic Hapludox) from the State of São Paulo, Brazil. Adsorption was higher in the clayey Oxisols, followed by the Alfisol and the coarser Oxisols. Calcium carbonate promoted an increase in the amount of adsorbed boron in all soils, with the most pronounced effect in the coarser-textured Oxisols. High correlation coefficients were found between adsorbed boron and clay and amorphous aluminum oxide contents and specific surface area (r = 0.79, 0.76 and 0.73, respectively, p < 0.01). Clay content, free aluminum oxide, and hot CaCl2 (0.01 mol L-1)-extracted boron explained 93% of the variation of adsorbed boron. Langmuir and Freundlich isotherms fitted well... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical soils; Simple correlation; Multiple regression analysis. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000200020 |
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| Germano,Mariana Gomes; Cannavan,Fabiana de Souza; Mendes,Lucas William; Lima,Amanda Barbosa; Teixeira,Wenceslau Geraldes; Pellizari,Vivian Helena; Tsai,Siu Mui. |
| The objective of this work was to evaluate the catabolic gene diversity for the bacterial degradation of aromatic hydrocarbons in anthropogenic dark earth of Amazonia (ADE) and their biochar (BC). Functional diversity analyses in ADE soils can provide information on how adaptive microorganisms may influence the fertility of soils and what is their involvement in biogeochemical cycles. For this, clone libraries containing the gene encoding for the alpha subunit of aromatic ring-hydroxylating dioxygenases (α-ARHD bacterial gene) were constructed, totaling 800 clones. These libraries were prepared from samples of an ADE soil under two different land uses, located at the Caldeirão Experimental Station - secondary forest (SF) and agriculture (AG) -, and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catabolic genes; Genetic diversity; Land use systems; Microbial ecology; Tropical soils. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500004 |
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| Avanzi,Junior Cesar; Norton,Lloyd Darrell; Silva,Marx Leandro Naves; Curi,Nilton; Oliveira,Anna Hoffmann; Silva,Mayesse Aparecida da. |
| The objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. Argisols, Cambisol, Latosols and Plinthosol within three eucalyptus-cultivated regions, in the states of Espírito Santo, Rio Grande do Sul and Minas Gerais, Brazil, were studied. For each region, soils under native vegetation were compared to those under minimum tillage with eucalyptus cultivation. The aggregate stability was measured using the high-energy moisture characteristic (HEMC) technique, i.e., the moisture release curve at very low suctions. This method compares the resistance of aggregates to slaking on a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus sp.; High-energy moisture characteristic curve; Forest systems; Tropical soils. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000100012 |
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| Sá,Jerusa Maia e; Jantalia,Cláudia Pozzi; Teixeira,Paulo César; Polidoro,José Carlos; Benites,Vinícius de Melo; Araújo,Adelson Paulo. |
| Abstract: The objective of this work was to evaluate agronomic and P recovery efficiencies of a granulated organomineral phosphate fertilizer (OMF) produced from poultry litter, compared with those of monoammonium phosphate (MAP), in soils with different textures. The experiment followed a 2x2x4+2 factorial arrangement, with two Oxisols (sandy loam and clay loam textures), two sources of P (OMF and MAP), four levels of P (50, 100, 200, and 400 mg kg-1), besides two control treatments without P application. The treatments were evaluated in 10-kg pots filled with soil, during four successive cultivations of corn without replacing the P absorbed by the plants, in order to evaluate the actual and residual effects of the fertilizers. Available P contents in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Biomass accumulation; Phosphate fertilization; P recovery efficiency; Tropical soils. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900786 |
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| Navarrete,Acácio Aparecido; Taketani,Rodrigo Gouvêa; Mendes,Lucas William; Cannavan,Fabiana de Souza; Moreira,Fatima Maria de Souza; Tsai,Siu Mui. |
| The study of the ecology of soil microbial communities at relevant spatial scales is primordial in the wide Amazon region due to the current land use changes. In this study, the diversity of the Archaea domain (community structure) and ammonia-oxidizing Archaea (richness and community composition) were investigated using molecular biology-based techniques in different land-use systems in western Amazonia, Brazil. Soil samples were collected in two periods with high precipitation (March 2008 and January 2009) from Inceptisols under primary tropical rainforest, secondary forest (5-20 year old), agricultural systems of indigenous people and cattle pasture. Denaturing gradient gel electrophoresis of polymerase chain reaction-amplified DNA (PCR-DGGE) using the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil microbial ecology; Soil microbiology; Microbial diversity; Land use changes; Tropical soils. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500007 |
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| Rolim Neto,Fernando Cartaxo; Schaefer,Carlos Ernesto Gonçalves Reynaud; Camêlo,Danilo de Lima; Corrêa,Marcelo Metri; Parahyba,Roberto da Boa Viagem; Caldas,Anildo Monteiro; Ibraimo,Anifo Soares Mamudo. |
| ABSTRACT The micromorphology of deeply weathered soils (Ferralsols/ Latossolos ) from the Central Plateau of Brazil remains little studied, and its affiliation to different parent materials, poorly known. To clarify the processes of soil formation of these acric, gibbsitic, Fe-oxide rich Ferralsols, three lithotoposequences on local ultrabasic to basic intrusive rocks were studied. The influences of mixing and pedobioturbation are evident in all soils, and Ferralsols of the Central Plateau of Brazil are polygenetic, based on the coarse mineral composition, with ultrabasic and metapelitic rock contributions. The typical oxic microstructure with stable microaggregates encompasses a gibbsite/Fe rich micromass with random inclusions of charcoal, allochthonous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ferralsols; Cambisols; Mafic rocks; Ultramafics; Perovskite; Tropical soils. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100307 |
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| Farias,Samuel Christian Cohen; Silva Júnior,Mário Lopes da; Ruivo,Maria de Lourdes Pinheiro; Rodrigues,Possidônio Guimarães; Melo,Vânia Silva de; Costa,Adriane da Rocha; Souza Júnior,João Cardoso de. |
| ABSTRACT The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carried out to evaluate changes in phosphorus forms in an Argissolo Amarelo Distrófico (Ultisol) submitted to burning and trituration of secondary forest in eastern Amazon. The evaluated systems were: slash-and-burn of vegetation; slash-and-mulch of vegetation; and secondary vegetation. The labile, moderately labile, moderately recalcitrant, available and total phosphorus fractions were assessed at the soil depths of 0.00-0.05, 0.05-0.10 and 0.10-0.20 m. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shifting cultivation; Tropical soils; Phosphorus fractions; Organic phosphorus. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100506 |
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| Santos,Hemmannuella Costa; Oliveira,Fábio Henrique Tavares de; Salcedo,Ignácio Hernan; Souza,Adailson Pereira de; Mota Silva,Valério Damásio da. |
| The soil P sorption capacity has been studied for many years, but little attention has been paid to the rate of this process, which is relevant in the planning of phosphate fertilization. The purpose of this experiment was to assess kinetics of P sorption in 12 representative soil profiles of the State of Paraíba (Brazil), select the best data fitting among four equations and relate these coefficients to the soil properties. Samples of 12 soils with wide diversity of physical, chemical and mineralogical properties were agitated in a horizontal shaker, with 10 mmo L-1 CaCl2 solution containing 6 and 60 mg L-1 P, for periods of 5, 15, 30, 45, 60, 90, 120, 420, 720, 1,020, and 1,440 min. After each shaking period, the P concentration in the equilibrium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adsorption; Kinetic equations; Phosphate; Tropical soils; Semi-arid soils. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400024 |
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| Crusciol,Carlos Alexandre Costa; Garcia,Rodrigo Arroyo; Castro,Gustavo Spadotti Amaral; Rosolem,Ciro Antonio. |
| Especially under no-tillage, subsuface soil acidity has been a problem, because it depends on base leaching, which has been associated with the presence of low molecular weigth organic acids and companion anions. The objective of this study was to evaluate exchangeable base cation leaching as affected by surface liming along with annual urea side-dressing of maize and upland rice. Treatments consisted of four lime rates (0, 1500, 3000, and 6000 kg ha-1) combined with four nitrogen rates (0, 50, 100, and 150 kg ha-1) applied to maize (Zea mays) and upland rice (Oryza sativa), in two consecutive years. Maize was planted in December, three months after liming. In September of the following year, pearl millet (Pennisetum glaucum) was planted without... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lime; Nitrogen fertilization; Nutrient cycling; Tropical soils. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600014 |
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| Ribeiro,Bruno Teixeira; Nascimento,Diogo Costa; Curi,Nilton; Guilherme,Luiz Roberto Guimarães; Costa,Enio Tarso de Souza; Lopes,Guilherme; Carneiro,João Paulo. |
| ABSTRACT In the Brazilian Cerrado biome, there are wetlands locally known as “Veredas”, which are swampy plains between hills and rivers. Since the 1970’s, the Cerrado biome has been gradually converted to livestock, crop, or forestry production. Until now, very few studies were conducted to evaluate the baseline contents of trace elements in Cerrado wetland soils. Due to their position in the landscape (bottom lands), the wetlands are potentially susceptible to contamination by runoff and/or leaching from surrounding areas at higher altitudes. This work evaluated the As, Cd, Pb, Ni, Zn, Cu, Mn, and Fe contents in soils from six wetlands (undisturbed and disturbed) in the Minas Gerais Triangle region, Brazil. In each wetland, we collected topsoil samples... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waterlogged soils; Soil contamination; Tropical soils; Heavy metals. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100515 |
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| Registros recuperados: 42 | |
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