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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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| Silva,Mayesse Aparecida da; Silva,Marx Leandro Naves; Owens,Phillip Ray; Curi,Nilton; Oliveira,Anna Hoffmann; Candido,Bernardo Moreira. |
| ABSTRACT Digital soil mapping (DSM) permits continuous mapping soil types and properties through raster formats considering variation within soil class, in contrast to the traditional mapping that only considers spatial variation of soils at the boundaries of delineated polygons. The objective of this study was to compare the performance of SoLIM (Soil Land Inference Model) for two sets of environmental variables on digital mapping of saturated hydraulic conductivity and solum depth (A + B horizons) and to apply the best model on runoff risk evaluation. The study was done in the Posses watershed, MG, Brazil, and SoLIM was applied for the following sets of co-variables: 1) terrain attributes (AT): slope, plan curvature, elevation and topographic wetness... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geomorphons; Terrain attributes; Saturated hydraulic conductivity; Solum depth. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100310 |
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| Oliveira,Anna Hoffmann; Silva,Marx Leandro Naves; Curi,Nilton; Klinke Neto,Gustavo; Silva,Mayesse Aparecida da; Araújo,Elias Frank de. |
| O desenvolvimento da erosão hídrica ocorre em resposta ao modo como a água se move através e sobre uma determinada paisagem. O modelo digital de elevação (MDE) deve, portanto, ser o mais preciso possível, uma vez que constitui a base para a análise do relevo. Este trabalho teve como objetivo definir um modelo digital de elevação hidrologicamente consistente (MDEHC) e o método de direção de fluxo mais adequado para a definição da rede de drenagem na sub-bacia do horto florestal Terra Dura, município de Eldorado do Sul, RS. Foram testados os modelos gerados com os interpoladores Topogrid e redes triangulares irregulares (Triangulated Irregular Network -TIN) linear (TIN L) e TIN natural neighbor (TIN NN). A qualidade em relação às análises hidrológicas foi... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Topogrid; TIN linear; TIN natural neighbor; Direção de fluxo. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400020 |
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| Oliveira,Anna Hoffmann; Silva,Marx Leandro Naves; Curi,Nilton; Avanzi,Junior Cesar; Klinke Neto,Gustavo; Araújo,Elias Frank. |
| The constant increasing of eucalyptus forest areas in Brazil requires an accurate monitoring of water erosion. The present study aimed to evaluate soil, nutrients and organic carbon losses occasioned by water erosion in eucalyptus planted forests (EPF) at different development stages (2, 3 and 7 years old). Soil erosion sediments were measured and sampled from standard erosion plots installed on Red Argisol-RA (Ultisol) and Haplic Cambisol-HC (Inceptisol). Soil loss decreased as the age of plants increased; at the beginning of plant development, the canopy barely covered the soil surface, exposing the soil to higher erosion at young EPF plantations. Furrow planting system was used in the Red Argisol area and caused higher soil losses (1.1 to 6.2 Mg ha-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Afforestation; Conservation system. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000200007 |
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| Gomide,Plínio Henrique Oliveira; Silva,Marx Leandro Naves; Castro,Gislene Carvalho de; Soares,Cláudio Roberto Fonsêca Sousa; Oliveira,Anna Hoffmann; Curi,Nilton. |
| Gullies are an expression of intense environmental degradation, particularly soil and vegetation. The objective of this work was to characterize the natural regeneration and vegetation planted in gully areas in the south of Minas Gerais State, Brazil, so the distribution and occurrence of the species can generate useful information for an adequate diagnosis on the development stage of gullies and for soil conservation. The study involved the characterization of vegetation present in the different segments of the gully areas, the bed, the bare middle third (BMT), middle third with vegetation cover (MTVC), and a fragment of native vegetation (FNV) located closer to the gully areas and adopted as a reference. In the gully area 3, the sampling took place in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Natural regeneration; Plant cover. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200006 |
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| Silva,Mayesse Aparecida da; Silva,Marx Leandro Naves; Curi,Nilton; Oliveira,Anna Hoffmann; Avanzi,Junior Cesar; Norton,Lloyd Darrell. |
| Eucalyptus plantations are normally found in vulnerable ecosystems such as steep slope, soil with low natural fertility and lands that were degraded by agriculture. The objective of this study was to obtain Universal Soil Loss Equation (USLE) factors and use them to estimate water erosion risk in regions with eucalyptus planted. The USLE factors were obtained in field plots under natural rainfall in the Rio Doce Basin, MG, Brazil, and the model applied to assess erosion risk using USLE in a Geographic Information System. The study area showed rainfall-runoff erosivity values from 10,721 to 10,642 MJ mm ha-1 h-1 yr-1. Some soils (Latosols) had very low erodibility values (2.0 x 10-4 and 1.0 x 10-4t h MJ-1 mm-1), the topographic factor ranged from 0.03 to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: USLE factors; Soil loss tolerance; Conservation practices; Forest management. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200007 |
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