Mineralogia e reserva de K de Cambissolos submetidos a diferentes manejos após derrubada e queima da floresta na Amazônia Meridional

Orrutéa, Alessandro Góis; Melo, Vander Freitas; Motta, Antônio Carlos Vargas; Lima, Valmiqui Costa

doi:10.1590/s0044-59672012000400003

Cited by 6 publications

(9 citation statements)

References 20 publications

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“…It is plausible that the medium level of P available in soils under native forest (Figure 2d) and the presence of a primary mineral source of this nutrient at the study site (Orrutéa et al, 2012) supplied enough P to native vegetation. High P uptake in abundant forest vegetation might become available through slashing and burning of this vegetation.…”

Section: Soil Fertilitymentioning

confidence: 98%

“…The high values of pH (Figure 2a) and Ca 2+ concentration (Figure 2b) in soil under native forest were attributed to local associations of granite/gneiss with limestone (Orrutéa et al, 2012) and the low degree of development of Inceptisol. Another important factor in maintaining high levels of sum of bases in forest soils is nutrient cycling (Bedel et al, 2016).…”

Section: Soil Fertilitymentioning

confidence: 99%

“…Local climate is tropical humid -Am, according to the Köppen classification system, with average rainfall from 1,400 to 2,300 mm yr -1 and average annual air temperature from 23 °C to 26 °C. The area has biotite granite/gneiss as parent material (Orrutéa et al, 2012), rolling relief, and average altitude of 188 m.…”

Section: Study Area and Soil Samplingmentioning

confidence: 99%

“…The region of the present study (southwestern Amazon) is dominated by Inceptisol, with high natural levels of exchangeable bases (Ca 2+ , Mg 2+ , and K + ) and granite/gneiss as parent material (Orrutéa et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Land Use and Changes in Soil Morphology and Physical-Chemical Properties in Southern Amazon

Melo

Orrutéa

Motta

et al. 2017

Rev. Bras. Ciênc. Solo

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Many Amazonian farmers use the slash-and-burn method rather than fertilization for crop production. The aim of the present study was to evaluate changes in the morphological, physical, and chemical properties of naturally fertile Inceptisols after conversion from native forest to different uses in southern Amazonia, Brazil. Land covered by dense native forest (NF) was split into four areas of 1.0 ha each. Three areas were slashed and burned and then cultivated for 11 years with coffee (CO), secondary forest (SF), and pasture (PA). Four soil profiles were sampled in each treatment (four uses × four replicates). The mean value distribution of each physical and chemical analysis was determined for different depths, and standard error bars were placed to display significant differences among treatments. Results showed that morphology and physical properties were negatively affected after the establishment of PA and CO: a reduction in the thickness of the A horizon and in aggregate stability, a decrease in total porosity and macroporosity, and an increase in aggregate size and bulk density. Soil bulk density (SBD), geometric mean diameter of water-stable aggregates (GMD), and microporosity (SMi) were higher in soil under pasture as a consequence of more intense soil surface compaction. Native and secondary forests were the only treatments that showed granular structures in the A horizon. Significant differences between native forest and secondary forest were mainly found in the top soil layer for total porosity (STP) (NF>SF), macroporosity (SMa) (NF>SF), SBD (NF>SF) and GMD (SF>NF). Phosphorus contents in the A horizon increased from 6.2 to 21.5 mg kg -1 in PA and to 27.2 mg kg -1 in SF. Soil under coffee cultivation exhibited the lowest levels of Ca 2+ and sum of bases in surface horizons. In all slash-and-burn areas there was a reduction in the C stock (Mg ha -1 ) of the A horizon: native forest 6.3, secondary forest 4.5, pasture 3.3, and coffee 3.1.

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Section: Soil Fertilitymentioning

confidence: 98%

Section: Soil Fertilitymentioning

confidence: 99%

Section: Study Area and Soil Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Land Use and Changes in Soil Morphology and Physical-Chemical Properties in Southern Amazon

Melo

Orrutéa

Motta

et al. 2017

Rev. Bras. Ciênc. Solo

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“…At high temperatures, intense rainfalls and good drainage conditions, mica and feldspars are transformed into kaolinite (ORRUTÉA et al, 2012) and K + and Na + are easily leached. It is worth emphasizing that these soils are originated from sandstones, which is generally a poor rock on basic elements.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Yellow Latosols (Oxisols) of Serra Do Quilombo, in Piauí State Savanna Woodlands - Brazil

et al. 2016

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-The savanna woodlands of Piauí state has great economic importance since it is an area for agricultural expansion, being the fourth most important of Brazil and the first from Brazilian Northeastern. The area accounts for 5.9% of the Brazilian savanna woodlands and 36.9% of the Northeastern savanna, covering 46% of the Piauí state area, in a total of 11.5 million hectares. The goal of this research was to study pedoenvironments of Serra do Quilombo region, which is in Piauí state savanna, as well as identifying existing soil classes, according to the Brazilian System of Soil Classification -SiBCS. Soil identification consisted in characterizing soil profiles along a transect, assessing in-field conditions and collecting soil samples, in areas of native vegetation. The samples were gathered from three distinct points, being two at the edges and one at the center of the plateau. Soil analyses were carried out with samples collected from each horizon through trench digging up to a 2-m depth. Morphological, physical, chemical and mineralogical characterizations were performed for each soil profile, along with an evaluation of the effect of pedogenic factors on their formation and development. All soils under study were formed with source materials of the same geological formation; however, each rock has a distinct contribution to the process, involving sandstones and shales. The characteristics observed in the soil from Serra do Quilombo have no difference from the pattern found in the Brazilian plateaus, and soil profiles were classified as dystrophic clayey Yellow Latosols (Oxisols), according to the SiBCS.Key words: Soil classification. Latosolization. Pedogenesis. CARACTERIZAÇÃO DE LATOSSOLOS AMARELOS DA SERRA DO QUILOMBO NO CERRADO PIAUIENSERESUMO -O Cerrado piauiense tem grande importância econômica por ser uma área de expansão agrícola, sendo o quarto mais importante do Brasil e o primeiro do Nordeste. Representa 5,9 % do cerrado brasileiro, 36,9 % do nordestino e 46 % da área total do Estado do Piauí, ao todo são 11,5 milhões de hectares. O objetivo desta pesquisa foi estudar os pedoambientes da Serra do Quilombo, localizada no cerrado piauiense, e identificar as classes de solos existentes de acordo com o Sistema Brasileiro de Classificação de Solos. A identificação dos solos consistiu na caracterização de perfis de solo ao longo de um transecto, com a avaliação e coleta de solos em áreas de vegetação nativa, em três pontos, sendo nas extremidades e no centro da chapada. A análise dos solos e a coleta de amostras de cada horizonte dos três perfis de solo foram realizadas mediante abertura de trincheiras, com 2 m de profundidade. Foi feita a caracterização morfológica, física, química e mineralógica de cada perfil dos solos, juntamente com avaliação da influência dos fatores pedogenéticos na sua formação e evolução. Os solos estudados são formados de materiais de origem da mesma formação geológica, no entanto, com diferentes contribuições das diversas rochas, envolvendo arenitos e folhelhos. As car...

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Occurrence of iron and aluminum sesquioxides and their implications for the P sorption in subtropical soils

Bortoluzzi

Pérez

Ardisson

et al. 2015

Applied Clay Science

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Mineralogia e reserva de K de Cambissolos submetidos a diferentes manejos após derrubada e queima da floresta na Amazônia Meridional

Cited by 6 publications

References 20 publications

Land Use and Changes in Soil Morphology and Physical-Chemical Properties in Southern Amazon

Land Use and Changes in Soil Morphology and Physical-Chemical Properties in Southern Amazon

Characterization of Yellow Latosols (Oxisols) of Serra Do Quilombo, in Piauí State Savanna Woodlands - Brazil

Occurrence of iron and aluminum sesquioxides and their implications for the P sorption in subtropical soils

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