Mapeamento de áreas de campo limpo úmido no Distrito Federal a partir de fusão de imagens multiespectrais

França, Andreia Maria da Silva; Sano, Edson Eyji

doi:10.1590/s1982-45132011000200004

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…The results show that Humid Grasslands, one type of vegetation found in the Cerrado biome, have a high potential to store carbon in the soil, with an estimate of 244.17 mg C ha −1 (Standard error 16.86 mg C ha −1 ) until a depth of 60 cm. The total stock estimated for these areas in the Federal District was 206.71 ± 14.27 Gg•C, in 846.61 ha of Humid Grassland areas mapped by [22]. The results obtained suggest a possible difference between the studied areas, observing the presence of gleysols and plinthosols.…”

Section: Resultsmentioning

confidence: 74%

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Estimates for Carbon Stocks in Soil under Humid Grassland Areas in the Federal District of Brazil

França¹,

Paiva²,

Sano³

et al. 2014

OJE

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The soils that lay below humid ecosystems are characterized as being significant holders of carbon. Because of the great susceptibility of this type of environment to anthropic changes, expressive quantities of carbon stored in the soil can be released into the atmosphere. In the Cerrado biome (Brazil), only a few types of vegetation have had carbon storage levels in their soil estimated. The main purpose of this study was to obtain basic quantitative parameters for carbon storage and to identify the general aspects of soil in regions where there exists Humid Grasslands (Campo Limpo Úmido), a kind of humid area phytophysiognomy found in the Cerrado. We selected 6 regions of the Federal District with this kind of vegetation formation, characterized by low anthropic impact and located either in the interior or in the proximity of specially protected areas. In each one of the sampled regions, we marked a transect with 4 equidistant points and collected material at 7 different levels of depth: 0-5, 5-10, 10-20, 20-30, 30-40, 40-50 and 50-60 cm. We obtained 168 samples, with 84 related to Humid Grassland areas in gleysols and 84 samples related to areas in plinthosols-types of soil dominant in this environment. We determined the texture, bulk density and concentration of nitrogen and carbon at each depth. The average concentration of carbon for Humid Grassland areas was 55.19 g•kg −1 , with an average of 61.65 g•kg −1 for Gleysols and 48.73 g•kg −1 for Plinthosols. The soil samples displayed distinct textural differences between gleysols and plinthosols. There were no significant differences in soil density (0.75 kg•dm −3 for Gleysols and 0.72 kg•dm −3 for Plinthosols). The average concentration of nitrogen was 20.66 g•kg −1 , with 23.98 g•kg −1 for Gleysols and 17.34 g•kg −1 for Plinthosols. The average carbon storage for Humid Grassland areas, down to 60 cm deep, was 244.17 mg C ha −1 and the total estimated stock for these areas in the Federal District was 206.71 Gg•C. In general, the samples obtained in gleysols showed a carbon content and nitrogen level superior to those in plinthosols, although a greater sampling effort is needed to confirm the differences observed. The density values A. M. S. França et al. 778 of stored carbon in the soil beneath Humid Grassland areas proved to be superior to those values observed for other types of vegetation typical for the Cerrado environment.

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Section: Resultsmentioning

confidence: 74%

“…The mapping of Humid Grassland areas in the Federal District was done by [22], using multi-spectral images-Landsat5/TM and CBERS2B/HRC. By using the Kappa index, they obtained 80% accuracy in the mapping.…”

Section: Study Areamentioning

confidence: 99%

Estimates for Carbon Stocks in Soil under Humid Grassland Areas in the Federal District of Brazil

França¹,

Paiva²,

Sano³

et al. 2014

OJE

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“…Áreas úmidas ou alagáveis, tais como os campos de murundus, são ambientes altamente diversos que permanecem sempre ou periodicamente alagados (Franca 2011). São responsáveis por inúmeros serviços ecossistêmicos, tais como armazenamento de carbono no solo e abrigo de elevada biodiversidade (Mitsch e Gosselink 2000).…”

Section: Introductionunclassified

Chemical and physical attributes and calcium, magnesium, potassium, and phosphorus in the soil of murundu fields in Brazil

et al. 2015

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RESUMO Campos de murundus (CM, Al 3+ and H+Al] and physical [texture and bulk density (Bd)] soil attributes and calculate the organic matter (OM) and nutrient stock (P, Ca, Mg, and K) in soils of FM located in the Guapore River basin in Mato Grosso. Thirty-six sampling points were selected, and soil samples were collected from two environments: the murundu and plain area surrounding (PAS). At each sampling point, mini trenches of 0.5 × 0.5 × 0.4 m were opened and disturbed and undisturbed soil samples were collected at depths of 0-0.1, 0.1-0.2, and 0.2-0.4 m. In the Principal Component Analysis the variables H+Al (49%) and OM (4%) were associated with the F1 component and sand content (47%) with the F2 component. The FM had lower pH values and higher concentrations of K + , P, and H+Al than PAS at all depths (p < 0.05). Additionally, FM stocked up to 433, 360, 205, and 11 kg ha -1 of Ca, Mg, K, and P, respectively, for up to a depth of 0.2 m. The murundu stored two times more K and three times more P than that in the PAS. Our results show that the FM has high sand content and Bd greater than 1.5 Mg m -3 , high acidity, low OC content, and low nutrient concentrations. Thus, special care must be taken to preserve FM such that human intervention does not trigger environmental imbalances.

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Mapeamento de áreas de campo limpo úmido no Distrito Federal a partir de fusão de imagens multiespectrais

Abstract: Artigo recebido para publicação em 13/05/2011 e aceito para publicação em 05/07/2011. RESUMO:As

Cited by 2 publications

References 6 publications

Estimates for Carbon Stocks in Soil under Humid Grassland Areas in the Federal District of Brazil

Estimates for Carbon Stocks in Soil under Humid Grassland Areas in the Federal District of Brazil

Chemical and physical attributes and calcium, magnesium, potassium, and phosphorus in the soil of murundu fields in Brazil

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