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Adaptation and application of the erosion potential method for tropical soils1 Rev. Ciênc. Agron.
Sakuno,Natanael Rodolfo Ribeiro; Guiçardi,Augusto Cesar Ferreira; Spalevic,Velibor; Avanzi,Junior Cesar; Silva,Marx Leandro Naves; Mincato,Ronaldo Luiz.
ABSTRACT The water erosion process has a considerable negative effect on tropical soils, causes soil losses from arable land and reduces the capacity to support surrounding ecosystems. Estimating soil losses caused by water erosion is fundamental for evaluating the impacts of various production systems. Therefore, improving soil loss estimates via the adaptation of models for different edaphoclimatic environments is necessary for estimating local geographic and climatic differences. This study aimed to adapt, apply and evaluate the potentialities of the Potential Erosion Method for Latosols of the Hydrographic Subbasin of Caçús Stream, southern Minas Gerais State. Geological, topographic, pedological, climatic and land use and occupation data were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Modeling of water erosion; RUSLE; Tropical soils.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100409
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Adsorção de nitrato em solos com cargas variáveis. Repositório Alice
ALCÂNTARA, M.A.K. de; CAMARGO, O.A. de.
O objetivo deste trabalho foi avaliar o comportamento adsortivo do nitrato em relação às modificações da carga líquida do solo decorrentes da adição de ácidos, bases (carbonatos), fosfato e sulfato. Foram utilizadas amostras dos horizontes A e B de dois solos: Latossolo Vermelho acriférrico e Nitossolo Vermelho eutrófico. Para verificar o comportamento adsortivo do nitrato em relação aos tratamentos, ajustaram-se isotermas de adsorção de Freundlich (exponencial). O modelo de Freundlich descreve satisfatoriamente a adsorção do nitrato ao solo em todos os tratamentos. Existe correlação significativa entre o pH e a carga líquida dos solos, considerando-se os tratamentos aplicados ao horizonte B do Latossolo Vermelho. A adsorção do nitrato nos horizontes A e B...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Solos tropicais; Nitrogênio; Carga líquida; Tropical soils; Nitrogen; Net charge.
Ano: 2005 URL: http://www.alice.cnptia.embrapa.br/handle/doc/113968
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Aggregate stability in soils cultivated with eucalyptus. Repositório Alice
AVANZI, J. C.; NORTON, L. D.; SILVA, M. L. N.; CURI, N.; OLIVEIRA, A. H.; SILVA, M. A. 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...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Curva característica de umidade em alta energia; Eucalipto; Floresta; Solo tropical; Umidade; Eucalyptus; Forest soils; Tropical soils.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/903131
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Aggregate stability in soils cultivated with eucalyptus PAB
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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Agronomic and P recovery efficiency of organomineral phosphate fertilizer from poultry litter in sandy and clayey soils. Repositório Alice
SÁ, J. M. e; JANTALIA, C. P.; TEIXEIRA, P. C.; POLIDORO, J. C.; BENITES, V. de M.; ARAÚJO, A. P..
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 soil were...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Phosphate fertilization; P recovery efficiency; Acúmulo de biomassa; Adubação fosfatada; Eficiência de recuperação de P; Solo tropical; Zea Mays; Biomass production; Tropical soils.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079152
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Agronomic and P recovery efficiency of organomineral phosphate fertilizer from poultry litter in sandy and clayey soils PAB
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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Amazon landforms and soils in relation to biological diversity Acta Amazonica
Sombroek,Wim.
Thirteen main landform units are distinguished for the whole of the forested Amazon region, each with its specific soil pattern and vegetation structure. These landform-soil-vegetation units are delineated on a small-scale map and illustrated by a schematic cross-section. Floristic diversity of the gamma type is to be highest on the steepland-and-valley complexes of the Andean fringe, on the crystalline shield uplands, on the inselberg complexes, and on the eutric variant of the western sedimentary plains. Endemism is expected to be highest on the sandy plains, and parts of the table lands and inselberg complexes. Speciation, linked to the concept of forest refuge areas, is likely to be highest on the sandstone table lands, on the stretches of Amazon...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Major landforms; Tropical soils; Floristic biodiversity.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000100081
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Archaea diversity in vegetation gradients from the Brazilian Cerrado BJM
Araujo,Ademir Sergio Ferreira de; Mendes,Lucas Wiliam; Bezerra,Walderly Melgaço; Nunes,Luis Alfredo Pinheiro Leal; Lyra,Maria do Carmo Catanho Pereira de; Figueiredo,Marcia do Vale Barreto; Melo,Vania Maria Maciel.
Abstract We used 16S rRNA sequencing to assess the archaeal communities across a gradient of Cerrado. The archaeal communities differed across the gradient. Crenarcheota was the most abundant phyla, with Nitrosphaerales and NRPJ as the predominant classes. Euryachaeota was also found across the Cerrado gradient, including the classes Metanocellales and Methanomassiliicoccaceae.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Microbial ecology; Soil microbiology; 16S rRNA; Tropical soils.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300522
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Armazenamento de carbono em frações lábeis da matéria orgânica de um Latossolo Vermelho sob plantio direto. Repositório Alice
BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J.; PAVINATO, A..
A reserva de carbono na matéria orgânica (MO) do solo é uma importante estratégia para atenuar a concentração de dióxido de carbono na atmosfera. O objetivo deste trabalho foi avaliar o efeito do plantio direto (PD), durante seis anos, sob quatro sistemas de cultura de outono na sucessão comercial soja-milho (guandu- anão-milheto, crotalária-sorgo, girassol-aveia-preta e nabo forrageiro-milho), no armazenamento de carbono nas frações particulada (>53 mm) e associada aos minerais (<53 mm) da MO de um Latossolo Vermelho argiloso da Região do Cerrado. Em comparação ao preparo convencional (PC) com cultivo de culturas estivais, o PD aumentou os estoques de carbono orgânico total (COT) na camada superficial do solo (0-5 cm). Na camada de 0-20 cm, o solo...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Solos tropicais; Efeito estufa; Agricultura conservacionista; Manejo do solo; Tropical soils; Greenhouse effect; Conservative agriculture; Soil management.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/112192
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Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region Rev. Bras. Ciênc. Solo
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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Associations between attributes of Nitisols and the climate of the southern coast of Pernambuco. Repositório Alice
NEVES, L. V. de M. W.; SANTOS, J. C. B. dos; SOUZA JÚNIOR, V. S. de; CORRÊA, M. M.; ARAUJO FILHO, J. C. de..
Nitisols are livelihood sources of agricultural and socio-economic development in several underdeveloped countries worldwide, including Brazil. Brazilian Nitisols are usually associated with basaltic rocks found in the Southern and Southeastern regions of the country. However, Nitisols derived from basalt also occur on the southern coast of Pernambuco state, a region under full urban, agricultural, and industrial development. Aiming to understand the relationship between climate and attributes of Nitisols from the southern coast of Pernambuco, we performed morphological descriptions, physical and chemical analyzes, iron selective extraction, and soil mineralogy (sand, silt, and clay) for three basaltic soil profiles along a land slope. The results suggest...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Relação solo-ambiente; Processo de xantização; Soil-environment relationship; Xanthization process; Solo Tropical; Tropical soils.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091485
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Availability of a soluble phosphorus source applied to soil samples with different acidicity levels Rev. Bras. Ciênc. Solo
Viégas,Ricardo Almeida; Novais,Roberto Ferreira; Schulthais,Fernanda.
Considerations on the interactions of P in the soil-plant system have a long history, but are still topical and not yet satisfactorily understood. One concern is the effect of liming before or after application of soluble sources on the crop yield and efficiency of available P under these conditions. The aim of this study was to evaluate the effect of soil acidity on availability of P from a soluble source, based on plant growth and chemical extractants. Nine soil samples were incubated with a dose of 200 mg kg-1 P in soil with different levels of previously adjusted acidity (pH H2O 4.5; 5.0; 5.5; 6.0 and 6.5) and compared to soils without P application. After 40 days of soil incubation with a P source, each treatment was limed again so that all pH values...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropical soils; Mehlich-1; Bray-1; Resin.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400012
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Boron adsorption in soils from the state of Sao Paulo, Brazil. Repositório Alice
ALLEONI, L.R.F.; CAMARGO, O.A. de.
O objetivo deste trabalho foi avaliar os teores de boro adsorvido em solos representativos do Estado de Sao Paulo (Latossolo Roxo distrofico argiloso, Latossolos Vermelhos-Escuros alicos textura media e muito argilosa, Latossolo Vermelho-Amarelo alico textura media e Podzolico Vermelho-Amarelo eutrofico textura arenosa/media). A adsorcao nos Latossolos argilosos foi superior a do Podzolico que, por sua vez, foi superior a dos Latossolos de textura media. A calagem promoveu aumento na quantidade de B adsorvido, principalmente nos Latossolos de textura media. A calagem promoveu aumento na quantidade de B adsorvido, principalmente nos Latossolos de textura media. Altas correlacoes foram encontradas para teores de argila e de oxido de aluminio amorfo, e...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Solo tropical; Correlacao; Metodo estatistico; Tropical soils; Correlation; Statistical methods.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/101305
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Boron adsorption in soils from the State of São Paulo, Brazil PAB
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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Caracterização dos solos da área de entorno do reservatório da Usina Hidrelétrica de Tombos, MG. Infoteca-e
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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Carbon losses and soil property changes in ferralic Nitisols from Cuba under different coverages Scientia Agricola
Hernández-Jiménez,Alberto; Vargas-Blandino,Dania; Bojórquez-Serrano,José Irán; García-Paredes,Juan Diego; Madueño-Molina,Alberto; Morales-Díaz,Marisol.
ABSTRACT The transformation of primary forestlands into lands under cultivation exerts an impact on the physical and chemical properties of the soils, leading to loss of carbon from the soil. The aims of this study were (1) to estimate the impact of different land use on organic carbon stock (OC-stock) and (2) to determine the clay percentage, the dispersion factor, and bulk density with regard to soil management. Thirty soil profiles were sampled as follows: four under primary forests with 80-100 years (old growth); two under secondary wood forests with 45-50 years; eight under secondary young forests with 15-25 years; four under pasture land with 15-20 years; and 12 under continuous cultivation for > 50 years. We determined the changes in OC-stock in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Degradation; Carbon reserves; Physical properties; Tropical soils.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000400311
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Characterization and classification of two soils derived from basic rocks in Pernambuco State Coast, Northeast Brazil Scientia Agricola
Oliveira,Lindomário Barros de; Ferreira,Maria da Graça de Vasconcelos Xavier; Marques,Flávio Adriano.
Geomorphic surfaces that present soils derived from basic rocks under warm and humid climate are unique scenarios for studying tropical soils. This paper aimed to characterize and classify two pedons derived from basalt at the Atlantic Forest Zone, Pernambuco State, Northeastern coast of Brazil. Two representative pedons (P1 and P2) were selected on a hillslope at the Cabo de Santo Agostinho municipality. Field macromorphological descriptions were carried out and soil horizon were sampled for physical, chemical, mineralogical and micromorphological characterization. The soils were classified, according to the Brazilian System of Soil Classification (and US Soil Taxonomy) as: "Latossolo Vermelho-Amarelo distroférrico argissólico" (Typic Hapludox) (P1) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Red Nitisol; Red-Yellow Latosol; Cabo de Santo Agostinho; Tropical soils.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000600009
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Characterization of two humic acid fractions and their contribution to soil nitrogen supplying capacity of tropical lowland rice soils International Rice Research Institute
Nguyen Bao Ve.
xviii, 99 l. : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice soils; Humic acids; Nitrogen; Soil nutrient balance; Tropical soils; Lowlands.
Ano: 1996 URL: http://hdl.handle.net/123456789/605
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Charcoal (Biochar) as soil conditioner to enhance fertilizers and water use efficiency in agriculture in acid tropical soils in the Central Amazon Basin Repositório Alice
TEIXEIRA, W. G.; STEINER, C.; MARTINS, G. C.; ARRUDA, M. R. de..
This article summarize result of many experiments conducted in 15 years of research with biochar in nursery and field experiments in the Central Amazon.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Biochar; CEC; Carvão vegetal; Latossolo amarelo; Solo tropical; Charcoal; Oxisols; Tropical soils.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1002122
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Chelating agents to solubilize heavy metals from Oxisols contaminated by the addition of organic and inorganic residues Scientia Agricola
Coscione,Aline Renée; Abreu,Cleide Aparecida de; Santos,Gláucia Cecília Gabrielli dos.
Phytoremediation is an attractive technique for soils contaminated with heavy metals, especially in conjunction with chelating agents to assist metal phytoextraction. Nevertheless, their studies in Brazil are rare. Thus, the objective of the present work was to evaluate the efficiency of the chelating agents EDDS and EDTA for the solubilization of heavy metals from two Oxisols contaminated by organic sources in Jaguariúna (LVJ) and inorganic sources in Paulínia (LVP), São Paulo State, Southeastern Brazil. First, the soil samples were fractionated and the DTPA method was used to quantify heavy metals available forms. The results indicated that the metals were highly available in the soil fractions and could be solubilized by the chelating agents. The soil...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil pollution; Chelating agents; Tropical soils; Fractionation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000100009
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