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| Registros recuperados: 156 | |
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| Carvalho,Douglas Antônio de; Oliveira-Filho,Ary Teixeira de; Vilela,Enivanis de Abreu; Curi,Nilton. |
| Realizou-se o levantamento florístico e fitossociológico da comunidade arbórea de um fragmento de Floresta Estacionai Semidecidual Sub-Montana localizado às margens do reservatório da usina hidrelétrica Dona Rita, situado na Fazenda Camarinha, em Itambé do Mato Dentro, MG, na bacia do rio Doce (19º26'S, 43º 14' W, altitude entre 610 e 630m). Todos os indivíduos com diâmetro do caule à altura do solo > 5,0cm (exceto lianas) encontrados em 35 parcelas de 15xl5m (0,78ha) foram identificados, medidos e tiveram sua altura estimada (também foram coletados indivíduos que se apresentavam com estruturas reprodutivas, fora das parcelas). Foram estimados para cada espécie os seguintes parâmetros: densidade por área, freqüência absoluta, dominância absoluta e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Florística; Fitossociologia; Floresta estacional semidecidual; Bacia do rio Doce. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062000000100005 |
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| Silva,Sérgio Henrique Godinho; Silva,Elen Alvarenga; Poggere,Giovana Clarice; Guilherme,Luiz Roberto Guimarães; Curi,Nilton. |
| ABSTRACT Portable X-ray fluorescence spectrometer (pXRF) has been recently adopted by the Soil Science community for uses in both field and laboratory, obtaining the total content of several chemical elements in a few seconds. Sulfuric acid digestion is an expensive and time-consuming laboratory analysis that provides contents of Fe2O3, Al2O3, SiO2, TiO2 and P2O5, important for soil studies. Due to few pXRF studies in tropical soils, this work aimed to compare contents of Fe2O3, Al2O3, SiO2, TiO2 and P2O5 obtained by pXRF with sulfuric acid digestion results, and to evaluate the effects of varying forms of preparing soil samples and scanning with pXRF on the resulting values in Brazilian soils. Soils were scanned in five conditions in-field (in situ) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil chemical properties; Proximal sensor; Sulfuric acid digestion analysis; Soil properties prediction; Oxides. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000100080 |
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| Mello,Carlos Rogério de; Norton,Lloyd Darrell; Curi,Nilton; Yanagi,Silvia Nazaré Monteiro. |
| Relationships between regional climates and oceanic and atmospheric anomalies are important in understanding the rainfall regime of a given region. This work aimed to analyze rainfall erosivity in the Upper Grande River Basin, Southern Minas Gerais State, Brazil; namely the two most representative environments, the Mantiqueira Range (MR) and the Plateau of Campos das Vertentes (PCV). These areas can be affected by the El Niño Southern Oscillation (ENSO) phenomena, which can be evaluated by indicators such as Sea Surface Temperature (SST) for the Niño 3.4 Region. Rainfall erosivity was calculated for individual rainfall events from January, 2006 to December, 2010. Pearson's coefficient of correlation was used to evaluate the relationships between rainfall... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil erosion; El-Niño; La-Niña; Grande River basin. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100007 |
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| Menezes,Michele Duarte de; Silva,Sérgio Henrique Godinho; Owens,Phillip Ray; Curi,Nilton. |
| In Brazil, soil surveys in more detailed scale are still scarce and necessary to more adequately support the decision makers for planning soil and environment activities in small areas. Hence, this review addresses some digital soil mapping techniques that enable faster production of soil surveys, beyond fitting continuous spatial distribution of soil properties into discrete soil categories, in accordance with the inherent complexity of soil variation, increasing the accuracy of spatial information. The technique focused here is knowledge-based in expert systems, under fuzzy logic and vector of similarity. For that, a contextualization of each tool in the soil types and properties prediction is provided, as well as some options of knowledge extraction... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digital soil mapping; Soil prediction; Conditioned Latin hypercube sampling; Knowledge miner. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000400001 |
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| Pinto,Leandro Campos; Zinn,Yuri Lopes; Mello,Carlos Rogério de; Owens,Phillip Ray; Norton,Lloyd Darrell; Curi,Nilton. |
| ABSTRACTUnderstanding soil formation processes across different landscapes is needed to predict how soil properties will respond to land use change. This study aimed to characterize mountainous Inceptisols (Cambisols) under high altitude subtropical climate in southeastern Brazil, by soil physical, chemical and micromorphological analyses, under native forest and pasture. The soil under pasture had a greater bulk density than under forest, resulting in a severe reduction of macroporosity. At two depths, coarse quartz grains are angular, suggesting absence of transportational processes, thus confirming an autochthonous pedogenesis from the underlying gneissic rock. Most feldspars were weathered beyond recognition, but mineral alteration was commonly seen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil formation; Soil microstructure; Land use change; Forest soils. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000500455 |
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| Lima,Pedro Luiz Terra; Silva,Marx Leandro Naves; Curi,Nilton; Quinton,John. |
| Adequate soil management can create favorable conditions to reduce erosion and water runoff, consequently increase water soil recharge. Among management systems intercropping is highly used, especially for medium and small farmers. It is a system where two or more crops with different architectures and vegetative cycles are explored simultaneously at the same location. This research investigated the effects of maize intercropped with jack bean on soil losses due to water erosion, estimate C factor of Universal Soil Losses Equation (USLE) and how it can be affected by soil coverage. The results obtained also contribute to database generation, important to model and estimate soil erosion. Total soil loss by erosion caused by natural rain, at Lavras, Minas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cover plants; C factor; Soil sustainability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200004 |
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| Dijair,Thaís Santos Branco; Silva,Fernanda Magno; Teixeira,Anita Fernanda dos Santos; Silva,Sérgio Henrique Godinho; Guilherme,Luiz Roberto Guimarães; Curi,Nilton. |
| ABSTRACT Portable X-ray fluorescence (pXRF) spectrometry has been useful worldwide for determining soil elemental content under both field and laboratory conditions. However, the field results are influenced by several factors, including soil moisture (M), soil texture (T) and soil organic matter (SOM). Thus, the objective of this work was to create linear mathematical models for conversion of Al2O3, CaO, Fe, K2O, SiO2, V, Ti and Zr contents obtained by pXRF directly in field to those obtained under laboratory conditions, i.e., in air-dried fine earth (ADFE), using M, T and SOM as auxiliary variables, since they influence pXRF results. pXRF analyses in field were performed on 12 soil profiles with different parent materials. From them, 59 samples were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PXRF; Soil moisture; Soil texture; Soil organic matter; Prediction models. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100211 |
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| Silva,Bárbara Pereira Christofaro; Silva,Marx Leandro Naves; Batista,Pedro Velloso Gomes; Pontes,Lucas Machado; Araújo,Elias Frank; Curi,Nilton. |
| ABSTRACT Monitoring water erosion and the factors that control soil and water loss are essential for soil conservation planning. The objective of this study was to evaluate soil and water losses by water erosion under natural rainfall in eucalyptus plantations established in 2001 (EF2), and 2004 (EF1), native forest (NF) and bare soil (BS), during the period of 2007 to 2012; and to determine the USLE factors: rain erosivity (R), erodibility (K) of a Red Argisol and the cover-management factor (C) for EF1, EF2 and NF at a pilot sub-basin, in Eldorado do Sul, RS, Brazil. The R factor was estimated by the EI30 index, using rainfall data from a gauging station located at the sub-basin. The soil and water losses were monitored in erosion plots, providing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Soil erodibility; Rainfall erosivity; Cover-management factor. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000400432 |
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| Oliveira,Jeani Moreira de; Silva,Sérgio Henrique Godinho; Menezes,Michele Duarte de; Kämpf,Nestor; Curi,Nilton. |
| ABSTRACT Environmental pollution is a problem that has been noted due to changes in the environment, affecting natural resources. Regarding the soil, it may offer great potential for waste disposal. Thus, this study aims to propose criteria for evaluating local suitability for waste disposal, according to soil and terrain attributes for southern Minas Gerais State, and to apply those criteria to define the most appropriate locations for installation of septic systems in a pilot watershed. Literature and the authors' experience were used to propose the more important criteria regarding the suitability of sites for waste disposal. The set of attributes taken into account was grouped into four suitability classes: Adequate, Regular, Restricted and Inadequate.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental pollution; Watershed; Pedology.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100037 |
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| Ramos,Marcus Vinícius Vieitas; Curi,Nilton; Motta,Paulo Emílio Ferreira da; Vitorino,Antonio Carlos Tadeu; Ferreira,Mozart Martins; Silva,Marx Leandro Naves. |
| Sendo as veredas importantes reguladores do equilíbrio dos cursos d'água da região dos cerrados, objetivou-se caracterizar e comparar solo, água e tipo de uso destes ambientes nas superfícies geomórficas Chapadas e Arenito Bauru. Foram coletadas amostras dos solos e da água, das veredas. O uso foi analisado por observações de campo e entrevistas com proprietários rurais. As veredas apresentam solos hidromórficos em toda a sua extensão, havendo maior homogeneidade no Bauru. Do terço superior em direção ao terço inferior, a drenagem piora, e são maiores os teores de argila, matéria orgânica e fertilidade natural. As veredas do Bauru apresentam melhor drenagem, maior fertilidade, menores teores de matéria orgânica de argila. A água enquadrou-se na classe 4,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambiente; Nascentes; Cerrado; Solos hidromórficos. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542006000200014 |
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| Motta,Paulo Emílio Ferreira da; Siqueira,José Oswaldo; Ribeiro,Bruno Teixeira; Norton,Lloyd Darrell; Silva,Sérgio Henrique Godinho; Curi,Nilton. |
| ABSTRACT Phosphorus is a key-nutrient in the fertility management of highly weathered tropical soils. So, this work was carried out with the objective of evaluating the influence of the interaction between P doses, mycorrhizal inoculation and historical land use on soybean growth and P uptake in five Latosols (Oxisols) with contrasting chemical, physical and mineralogical properties under a continuous long-term phosphate fertilization (more than 15 years). The plants were cultivated in 4.5L-plastic pots containing 4 kg of soil in a completely randomized design, four replications and 2x2x2 factorial scheme with two P doses; and with or without mycorrhizal inoculation; and soils cultivated for long periods and non-cultivated (under native vegetation). There... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycorrhiza; Latosols (Oxisols); Available P; Long-term cultivation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000400418 |
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| Bispo,Diêgo Faustolo Alves; Silva,Marx Leandro Naves; Marques,João José Granate de Sá e Melo; Bechmann,Marianne; Batista,Pedro Velloso Gomes; Curi,Nilton. |
| ABSTRACT Identifying and ranking nutrient loss risk areas are important steps towards integrated catchment management. This study aimed to apply the P index model at the Posses catchment, south of the state of Minas Gerais, Brazil. We applied the P index for the current land use at the Posses catchment and for two hypothetical scenarios: scenario 1, in which P fertilizer was applied to all land uses, except for native forests; and scenario 2, which considered the use of P fertilizer as in scenario 1, and that the Environmental Protection Areas referring to the riparian forests and springs were totally restored. Considering current land use, almost the whole catchment area (91.4%) displayed a low P loss risk. The highest P index was associated to croplands... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P index; Nutrient loss; Water erosion; Land use management; Environmental services.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500565 |
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| Santos,Walbert Júnior Reis dos; Curi,Nilton; Silva,Sérgio Henrique Godinho; Araújo,Elias Frank de; Marques,João José. |
| Water retention in soil is used in many agronomic and environmental applications, but its direct measurement is time-consuming and expensive. Therefore, pedotransfer functions (PTFs) are alternatives to obtain this information faster and more economically. The objectives of this study were to generate and validate PTFs to estimate the water content at potentials of -33 kPa (field capacity) and -1500 kPa (permanent wilting point) for different soil classes from the central-south portion of Rio Grande do Sul State. The physical and chemical analyses database from soil surveys of the Celulose Riograndense Corp were used. The database is composed of particle size distribution (coarse and fine sand, silt and clay), soil organic matter, and water content data at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Permanent wilting point; Field capacity; Water retention curve. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000100006 |
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| Menezes,Michele Duarte de; Curi,Nilton; Marques,João José; Mello,Carlos Rogério de; Araújo,Alexandre Romeiro de. |
| A aptidão agrícola das terras consiste em uma classificação técnica que identifica o potencial agrícola de utilização das mesmas, considerando as limitações do solo em níveis de manejo diferenciados a partir das informações geradas em um levantamento pedológico. O cruzamento dos dados de aptidão agrícola e uso atual das terras em ambiente SIG (Sistema de Informações Geográficas) consiste numa ferramenta adequada de planejamento, pois permite determinar a inadequação entre uso e aptidão agrícola, dando bases sustentáveis à exploração. Neste estudo, foram realizadas a avaliação da aptidão agrícola das terras e seu uso atual com auxílio de imagens de satélite e observações de campo, e a identificação de Áreas de Preservação Permanente (APPs) em uma sub-bacia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aptidão Agrícola das Terras; Áreas de Preservação Permanente; Taxa de Adequação de Uso. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000600013 |
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| Aquino,Regimeire Freitas; Silva,Marx Leandro Naves; Freitas,Diego Antonio França de; Curi,Nilton; Mello,Carlos Rogério de; Avanzi,Junior Cesar. |
| Rainfall erosivity and its spatial variability were studied for 54 pluviometric stations in Southern Minas Gerais State (48º00' - 44º00'W; 23º50' - 20º00'S), aiming to plan the land-use strategies. Therefore, erosivity factor was determined for the pluviometric stations, using long-term rainfall data sets obtained along with the Brazilian National Water Agency- ANA, which varied from 15 to 40 years. The monthly and annual erosivity indexes were generated using Fournier equation for Lavras, MG and the spatial distribution of rainfall erosivity was studied on the basis of geostatistical approaches considering only the distance which separates them, developing the isotropic experimental semivariogram. The semivariogram adjustment was done based on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Erosive potential; Soil sustainability; Kriging. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500006 |
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| Silva,Elen Alvarenga; Gomes,João Bosco Vasconcellos; Araújo Filho,José Coelho de; Vidal-Torrado,Pablo; Cooper,Miguel; Curi,Nilton. |
| The scarcity of comprehensive characterizations of soils associated to gentle summit depressions of the Northeastern Brazilian Coastal Plains justifies this work, which had as objective to provide basic information for the more diverse agricultural and non-agricultural uses. For that, representative soils (Spodosols or similar soils) from these environments were selected in Alagoas, Sergipe and Bahia states. This approach included characterization of morphological, mineralogical and micromorphological properties of the soil profiles, employing standard procedures. The morphological characterization corroborated the effect of the podzolization process during the formation of these soils. The mineralogy of the clay fraction of these soils was basically... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sand-quartzous soils; Cementation; Hydromorphism; Podzolization; Barreiras Formation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500003 |
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| Oliveira,Flávio Pereira de; Silva,Marx Leandro Naves; Curi,Nilton; Silva,Mayesse Aparecida da; Mello,Carlos Rogério de. |
| Entre os fatores climáticos que interferem na erosão hídrica, a precipitação pluvial, expressa pela erosividade da chuva, é o de maior importância. Portanto, seu conhecimento torna-se fundamental na recomendação de práticas de manejo e conservação do solo que visem à redução da erosão hídrica. Nesse contexto, os objetivos deste trabalho foram: a) determinar a erosividade da chuva e sua distribuição, na região do Vale do Rio Doce, MG, para nove sub-regiões; b) estimar o índice EI30 mensal, no período de 1969 a 2005, para os municípios de Ferros e Guanhães e c) determinar o tempo de retorno dos índices mensais e anuais de erosividade. O valor médio de erosividade obtido foi de 12.913 MJ mm ha-1 h-1 ano-1, sendo classificado como muito alto. Entre as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Erosividade; Planejamento conservacionista; Coeficiente da chuva; Período de retorno da chuva. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000600016 |
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| Registros recuperados: 156 | |
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