Modelagem da proteção do solo por plantas de cobertura no sul de Minas Gerais.

Freitas, Diego Antonio França de; Silva, Marx Leandro Naves; Castro, Nilmar Eduardo Arbex; Cardoso, Dione Pereira; Dias, Adriana Cristina; Carvalho, Gabriel José de

doi:10.18227/1982-8470ragro.v6i2.706

Cited by 7 publications

(7 citation statements)

References 8 publications

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“…When simulating conservationist management techniques for agropastoral activities at the hydrographic sub-basin, Ayer et al (2015) found out that total contribution of erosion in pasture plots and eucalyptus plantations decreases to 8.50% and 0.20%, respectively. This illustrates the potential and advantages of agro ecological conservationist management techniques, as illustrated by Freitas et al (2012).…”

Section: Resultsmentioning

confidence: 76%

Land use capacity and environment services

Servidoni

Ayer

Silva

et al. 2016

Rev. Bras. Geog. Fis.

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A B S T R A C TThe increasing demand for food resulting from demographic growth has required more productive agropastoral practices. Consequently, new areas were selected for agropastoral production in an arbitrary way, disregarding land use capacity. This ends up in acceleration of degradation processes, mainly those related to water erosion. In this context, the system of land use capacity proposes the classification of maximum use allowed for land of a rural property or of a hydrographic sub-basin, in an attempt to make sustainable plans of use and management of natural resources. Concerning current use of land, the system indicates the sites where there are conflicts in use in relation to their use capacity. Thus, it is possible to propose measures to adapt land use to its use capacity. Therefore, in this study, the classes of land use capacity at the hydrographic sub-basin of Córrego Pedra Branca, in Alfenas, in the state of Minas Gerais, were evaluated. For that purpose, the following soil parameters were evaluated: effective depth, water permeability, texture, declivity, erosion class, base saturation, effective and potential cationic exchange capacity, and aluminum saturation. Soil analyses presented values of base saturation and of low capacity of effective and potential cationic exchange, which illustrate the low natural fertility of these soils, as well as aluminum saturation level harmful to most cultures. Thus, land use would be restricted to low impact, permanent crops, silvicultures, associated agrosilvipastoral system with conservationist management techniques, as, for example, direct seeding, soil correction and fertilization, and reforestation of permanent preservation areas Capacidade de uso das terras e serviços ambientais R E S U M OA crescente demanda por alimentos devido ao crescimento demográfico tem exigido uma agropecuária mais produtiva. Novas áreas são destinadas à produção agropecuária de forma arbitrária, sem respeitar a capacidade de uso das terras. Neste contexto, o sistema de capacidade de uso das terras propõe a classificação do uso máximo permitido para terras de uma propriedade rural ou sub-bacia hidrográfica, buscando elaborar planos de uso e manejo sustentáveis de seus recursos naturais. Em relação ao uso atual das terras, o sistema indica os locais em que existe um conflito de uso em relação a sua capacidade de uso. Assim, é possível propor medidas para adequar o uso das terras com sua capacidade de uso. Nesta pesquisa, foram avaliadas as classes de capacidade de uso das terras da sub-bacia hidrográfica do Córrego Pedra Branca, Alfenas, Minas Gerais. Para tanto, foram avaliados os seguintes parâmetros do solo: profundidade efetiva, permeabilidade à água, textura, declividade, classe de erosão, saturação por bases, capacidade de troca catiônica efetiva e potencial, e saturação por alumínio. Ensaios analíticos do solo apresentaram valores de saturação por bases e de capacidade de troca catiônica efetiva e potencial baixos, que ilustram a baixa fertilidade natural desses solos ...

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Section: Resultsmentioning

confidence: 76%

Land use capacity and environment services

Servidoni

Ayer

Silva

et al. 2016

Rev. Bras. Geog. Fis.

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“…The SCI values corroborate with Castro et al (2011), who studied several cover crops, including jack bean. Freitas et al (2012) and Dias et al (2013) found that cultivation of jack bean reduced soil, water, nutrient, and soil organic matter losses, and strongly recommending it as a soil cover crop for the Lavras region.…”

Section: Soil Cover Indexmentioning

confidence: 99%

“…Combining corn with cover crops has been an intercropping combination effective in improving soil physical properties, controlling water erosion, and reducing organic carbon, nutrient, soil, and water losses (Debarba and Amado, 1997;Spagnollo et al, 2001;Albuquerque et al, 2005;Gilles et al, 2009;Silveira and Stone, 2010;Chen and Weil, 2011;Gabriel and Quemada, 2011;Freitas et al, 2012;Pereira et al, 2016). The benefits of using cover plants were also demonstrated by Gómez et al (2011), who concluded that they significantly reduced water erosion in comparison to traditional tillage practices in Southern France, Spain, and Portugal.…”

Section: Introductionmentioning

confidence: 99%

Relationship Among Crop Systems, Soil Cover, and Water Erosion on a Typic Hapludox

Lima

Silva

Quinton

et al. 2018

Rev. Bras. Ciênc. Solo

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Several soil conservation practices are used to reduce water erosion and ensure sustainable agriculture. An effective crop management practice is intercropping, in which two or more crops with different architectures and vegetative cycles are grown simultaneously in the same area. We hypothesized that intercropping of corn and jack-bean increases soil cover and reduce soil erosion by water in comparison to monocropping. The objective of this study was to evaluate the effects of different crop systems on soil cover and on soil erosion by water. Soil and water losses from a Typic Hapludox were measured under the following systems: corn cultivation (CO), jack-bean cultivation (JB), intercropping of corn and jack-bean (IC), and bare soil (BS), as a reference for maximum erosion rates. For each crop system, erosion plots with dimensions of 12 × 4 m were set up in the field on a 0.12 m m -1 slope gradient. The experiment was carried out under natural rainfall, over three crop seasons (November to March) from 2011 to 2014. The soil cover index of the systems was monitored during crop growth, and rainfall erosivity for the crop seasons was calculated according to the EI 30 index to interpret soil and water losses. A set of linear mixed models was fitted to relate soil losses to rainfall erosivity, crop systems, and soil cover. The average rainfall erosivity in the study area was 6,132 MJ mm ha -1 h -1 per crop season. The results indicate that water losses are directly related to erosivity and are less influenced by soil cover and cultivation systems than the soil losses. A linear maximum value of the soil cover index was achieved 70 days after sowing. Intercropping exhibited greater soil cover than single crops. Total soil losses from the three seasons display the trend: BS > CO > JB > IC. The best fitted model of the linear mixed models indicates that soil loss responses are strongly correlated with rainfall erosivity and soil cover, which nullified the influence of the crop systems in the model.

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“…Além das observações em campo, a importância relativa de cada fator foi atribuída com base na bibliografia. Para Weill e Sparovek (2008) e Freitas et al (2012) a cobertura do solo é o componente mais importante no controle da erosão hídrica. Nessa perspectiva, ao uso do solo foi atribuído maior peso, pois a alteração da cobertura vegetal é que rompe o estado de equilíbrio dinâmico e acelera os processos erosivos.…”

Section: Solounclassified

Vulnerabilidade Ambiental à Erosão Hídrica em uma Sub-Bacia Hidrográfica pelo Processo Analítico Hierárquico

Ribeiro¹,

Mincato

Curi

et al. 2016

Rev. Bras. Geog. Fis.

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A erosão hídrica é uma das maiores causas de depauperamento dos solos no mundo. No Brasil, a erosão causa a perda de produtividade, o avanço das fronteiras agrícolas, o assoreamento e a contaminação dos corpos d'água e a perda da biodiversidade. Neste cenário, para contribuir com o planejamento ambiental e a gestão territorial, foi avaliada a vulnerabilidade ambiental à erosão hídrica da sub-bacia hidrográfica do rio Mandu, sul de Minas Gerais, pela análise empírica da fragilidade dos ambientes naturais e antropizados. Para tanto, foram considerados os componentes da paisagem: uso do solo, relevo, solo, geologia e clima, em ordem decrescente de importância, pelo Processo Analítico Hierárquico. Foi verificado que os usos do solo estão adequados em 32,72% e inadequados em 67,28% da área. Mais especificamente, 17,68% apresentam forte propensão à erosão hídrica e 0,08% são locais em que os impactos diretos da erosão hídrica são irreversíveis. Portanto, a adoção de técnicas de manejo adequadas para as pastagens, a erradicação dos solos expostos e a redefinição dos locais de produção de café e da agricultura temporária atenuariam os impactos ambientais.

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Modelagem da proteção do solo por plantas de cobertura no sul de Minas Gerais.

Cited by 7 publications

References 8 publications

Land use capacity and environment services

Land use capacity and environment services

Relationship Among Crop Systems, Soil Cover, and Water Erosion on a Typic Hapludox

Vulnerabilidade Ambiental à Erosão Hídrica em uma Sub-Bacia Hidrográfica pelo Processo Analítico Hierárquico

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