Atributos físicos, químicos e biológicos do solo em ambientes de voçorocas no município de Lavras - MG

Gomide, Plínio Henrique Oliveira; Silva, Marx Leandro Naves; Soares, Cláudio Roberto Fonsêca Sousa

doi:10.1590/s0100-06832011000200026

Cited by 35 publications

(34 citation statements)

References 13 publications

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“…Metabolic quotient values of the forests evaluated in this study are within the range found for other forest ecosystems (Behera & Sahani, 2003) and can be classified as "low" compared to environments under stress (Gomide et al, 2011). These findings indicate that the forests in this study are at a more advanced succession stage, in which the energy accumulated in the system is greater (Odum, 1983;Insam & Haselwandter, 1989;Anderson & Domsch, 1990;Kieft et al, 1998).…”

Section: Discussionsupporting

confidence: 77%

Chemical and biochemical properties of Araucaria angustifolia (Bert.) Ktze. forest soils in the state of São Paulo

Carvalho

Moreira

Cardoso

2012

Rev. Bras. Ciênc. Solo

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SUMMARYAraucaria angustifolia, commonly named Araucaria, is a Brazilian native species that is intensively exploited due to its timber quality. Therefore, Araucaria is on the list of species threatened by extinction. Despite the importance of soil for forest production, little is known about the soil properties of the highly fragmented Araucaria forests. This study was designed to investigate the use of chemical and Index terms: soil quality, microbial biomass, soil enzymes, soil respiration, microbial metabolic quotient (qCO 2 ).(

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Section: Discussionsupporting

confidence: 77%

Chemical and biochemical properties of Araucaria angustifolia (Bert.) Ktze. forest soils in the state of São Paulo

Carvalho

Moreira

Cardoso

2012

Rev. Bras. Ciênc. Solo

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“…Santo Antônio do Jardim, SP, 2015 Para a variável quociente metabólico (qCO 2 ) não houve diferença significativa entre os sistemas avaliados (Quadro 4). Porém, elevados valores de qCO 2 , como os observados neste estudo, indicam que pode estar ocorrendo maior gasto de energia para a manutenção da comunidade microbiana, ou seja, devido a uma situação de estresse ou distúrbio, possivelmente determinada pelo manejo intensivo do solo e pelo frequente uso de agrotóxi-cos, os microrganismos poderão ter que consumir mais substrato para sua sobrevivência (Carneiro et al, 2008;Silva et al, 2010;Gomide et al, 2011). Outra explicação para este resultado pode estar associada ao fato de que quocientes metabólicos elevados são um indicativo de comunidades microbianas em estágios iniciais de desenvolvimento e com maior proporção de microrganismos ativos em relação aos inativos (Roscoe et al, 2006).…”

Section: Biomassa Microbiana Do Solounclassified

Biomassa e atividade microbiana do solo em diferentes sistemas de cultivo do cafeeiro

Guimarães¹,

Gallo²,

Fontanétti³

et al. 2017

Rev. Ciênc. Agr.

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R E S U M OO trabalho teve como objetivo avaliar a influência dos diferentes sistemas de cultivo do cafeeiro na biomassa e atividade microbiana do solo. O delineamento experimental consistiu em blocos casualizados, com cinco repetições. A primeira avaliação foi realizada no mês de abril e a segunda no mês de julho de 2015. Os tratamentos foram constituídos por três sistemas de cultivo do cafeeiro e duas áreas testemunhas: 1) Cafeeiro em consociação com espécies arbóreas e Urochloa cv. decumbens; 2) Cafeeiro em consociação com Urochloa cv. decumbens; 3) Cafeeiro em monocultura; 4) Área com solo em pousio e 5) Fragmento de vegetação nativa. A biomassa e atividade microbiana foram avaliadas em amostras de solo colhidas à profundidade de 0,0-0,10 m. As variáveis avaliadas foram: carbono da biomassa microbiana, respiração basal, quociente metabólico, quociente microbiano e carbono orgânico do solo. Avaliou-se também o acúmulo de manta morta (t ha -1 ) e a humidade do solo (kg kg -1 ). Os sistemas Fragmento de vegetação nativa, Cafeeiro em consociação com espécies arbóreas e U. cv. decumbens e Cafeeiro consociado com U. cv. decumbens favorecem a biomassa e a atividade microbiana do solo, independente da época de amostragem. Palavras-chave: bioindicadores, Coffea arabica, espécies arbóreas, Urochloa cv. decumbens A B S T R A C TThe work aimed to evaluate the influence of different coffee farming systems in soil microbial biomass and activity. The experimental design consisted in randomized blocks in split plot, with five repetitions. Two seasons were evaluated, the first in April and the second in July 2015. The treatments consisted of three coffee cultivation systems and two control areas: 1) Coffee intercropped with trees species and Urochloa cv. decumbens; 2) Coffee intercropped with Urochloa cv. decumbens; 3) Coffee in monoculture; 4) ground fallow and 5) native vegetation fragment. The soil microbial biomass and activity were assessed in soil samples collected at 0.0-0.10 m depth. The following variables were evaluated: microbial biomass carbon, basal respiration, metabolic quotient, microbial quotient and soil organic carbon. Litter accumulation (t ha -1 ) and soil moisture (kg kg -1 ) were also evaluated. The systems fragment of native vegetation, Coffee in consortium with tree species and U. cv. decumbens and Coffee intercropped with U. cv. decumbens favour soil microbial biomass and activity, regardless the sampling time.

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“…This area (~150.18 ha) does not have either a detailed soil map or a detailed geologic map and is located between latitudes 7,651,207 and 7,653,478 m and longitudes 501,962 and 503,957 m, Zone 23 K. The climate of the region is Cwa (C: subtropical climate; w: rainy summers; a: warm summers), characterized by rainy and warm summers and cold and dry winters, according to the Köppen classification system, with mean annual temperature and rainfall of 19 °C and 1530 mm, respectively [40]. The area encompasses a great geologic variety, with the dominance of leucocratic and mesocratic gneisses, the latter containing greater contents of Fe and darker minerals than the former, as well as a gabbro intrusion and sediments of varying nature.…”

Section: Study Area and Laboratory Analysesmentioning

confidence: 99%

Proximal Sensing and Digital Terrain Models Applied to Digital Soil Mapping and Modeling of Brazilian Latosols (Oxisols)

et al. 2016

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Digital terrain models (DTM) have been used in soil mapping worldwide. When using such models, improved predictions are often attained with the input of extra variables provided by the use of proximal sensors, such as magnetometers and portable X-ray fluorescence scanners (pXRF). This work aimed to evaluate the efficiency of such tools for mapping soil classes and properties in tropical conditions. Soils were classified and sampled at 39 locations in a regular-grid design with a 200-m distance between samples. A pXRF and a magnetometer were used in all samples, and DTM values were obtained for every sampling site. Through visual analysis, boxplots were used to identify the best variables for distinguishing soil classes, which were further mapped using fuzzy logic. The map was then validated in the field. An ordinary least square regression model was used to predict sand and clay contents using DTM, pXRF and the magnetometer as predicting variables. Variables obtained with pXRF showed a greater ability for predicting soil classes (overall accuracy of 78% and 0.67 kappa index), as well as for estimating sand and clay contents than those acquired with DTM and the magnetometer. This study showed that pXRF offers additional variables that are key for mapping soils and predicting soil properties at a detailed scale. This would not be possible using only DTM or magnetic susceptibility.

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Atributos físicos, químicos e biológicos do solo em ambientes de voçorocas no município de Lavras - MG

Abstract: RESUMO A região Sul de Minas Gerais apresenta grandes áreas comprometidas por erosões do tipo voçoroca, e a avaliação dos atributos do solo nesses ambientes é de

Cited by 35 publications

References 13 publications

Chemical and biochemical properties of Araucaria angustifolia (Bert.) Ktze. forest soils in the state of São Paulo

Chemical and biochemical properties of Araucaria angustifolia (Bert.) Ktze. forest soils in the state of São Paulo

Biomassa e atividade microbiana do solo em diferentes sistemas de cultivo do cafeeiro

Proximal Sensing and Digital Terrain Models Applied to Digital Soil Mapping and Modeling of Brazilian Latosols (Oxisols)

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