Florística dos campos de murundus do Pantanal do Araguaia, Mato Grosso, Brasil

Marimon, Beatriz Schwantes; Mews, Henrique Augusto; Jancoski, Halina; Franczak, Daniel David; Lima, Herson Souza; Lenza, Eddie; Rossete, Amintas Nazareth; Moresco, Micheli Cristina

doi:10.1590/s0102-33062012000100018

Cited by 43 publications

(70 citation statements)

References 37 publications

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“…No estado de Mato Grosso, os campos de murundus são de ampla ocorrência (MARIMON et al, 2012;SANTOS et al, 2015) e, gradualmente estão sendo drenados e incorporados à atividade agrícola, tanto para plantação de grandes culturas (soja, milho, por exemplo), conforme pode ser observado quando se viaja para as regiões da bacia do rio Araguaia, entre outras localidades.…”

Section: Introductionunclassified

Dinâmica Do Carbono Orgânico De Solos Sob Pastagens Em Campos De Murundus

Santos

Pierangeli

Silva³

et al. 2017

RSA

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RESUMO:Este trabalho objetivou avaliar, via fracionamento físico, a associação do carbono orgânico (CO) com frações granulométricas de solos de campos de murundus localizados na bacia hidrográfica do Rio Guaporé, sudoeste do Estado de Mato Grosso. As coletas das amostras de solo foram realizadas entre setembro e novembro em três diferentes áreas: pastagem nativa em uso, pastagem cultivada e área nativa sem uso. Em cada área foram abertas minitrincheiras de 0,50 m × 0,50 m × 0,40 m e coletadas amostras deformadas e indeformadas nas profundidades de 0,0-0,10, 0,10-0,20 e 0,20-0,30 m, três repetições em delineamento inteiramente casualizado. Foram determinados o teor de CO, o carbono particulado (COP), associado à fração areia e o carbono organo-mineral (COM), associado às frações argila + silte. Não foi verificado diferença entre os ambientes avaliados para as variáveis analisadas nas diferentes profundidades. Os maiores teores de COM foram observados na camada de 0,0-0,10 m, em todas as áreas. Conclui-se que o uso de pastagens naturais e a implantação de pastagens cultivadas, até o momento, não alteraram os teores de carbono do solo bem como suas associações com as frações granulométricas.Palavras-Chave: áreas úmidas, uso da terra, matéria orgânica particulada Abstract -This study aimed to evaluate, by physical fractionation, the association of organic carbon (OC) with granulometric fractions of soils of fields of murundus located at the Guaporé River hydrographic basin, southwest of the State of Mato Grosso. The sampling of soil were carried out between september and november 2011 in three different areas: native pastures in use, cultivated pastures and native areas without use. In each area were open minitrenches of 0,50 m × 0,50 m × 0,40 m and collected disturbed and undisturbed samples at the depths of 0,0-0,10, 0,10-0,20 and 0,20-0,30 m in three replications in completely randomized design. Were determined the carbon content (CO) and particulate carbon (COP), associated with the sand fraction and the organo-mineral carbon (COM), associated with argil + silt fractions. Was not observed difference between the environments evaluated for the variables evaluated in different depth. The highest levels of COM were observed at the depth of 0,0-0,10 m in all areas. It is concluded that the use of native pastures and cultivated pastures, until now, did not alter the contents of soil carbon as well as their associations with the granulometric fractions.

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Section: Introductionunclassified

Dinâmica Do Carbono Orgânico De Solos Sob Pastagens Em Campos De Murundus

Santos

Pierangeli

Silva³

et al. 2017

RSA

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“…The soils of these fields have low water infiltration capacity, remaining flooded between the murundus during the rainy season. These areas are vegetated by species tolerant to temporary flooding, whereas the dried part of the soil (upper-third of the murundus) presents typical vegetation of the Cerrado stricto sensu, with shrubs and trees (Marimon et al, 2012). Analogous formations to the murundus are also found in Africa, Australia, and North America (Silva et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi in soil aggregates from fields of "murundus" converted to agriculture

Carneiro

Ferreira

Souza

et al. 2015

Pesq. agropec. bras.

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-The objective of this work was to evaluate the spore density and diversity of arbuscular mycorrhizal fungi (AMF) in soil aggregates from fields of "murundus" (large mounds of soil) in areas converted and not converted to agriculture. The experiment was conducted in a completely randomized design with five replicates, in a 5x3 factorial arrangement: five areas and three aggregate classes (macro-, meso-, and microaggregates). The evaluated variables were: spore density and diversity of AMF, total glomalin, total organic carbon (TOC), total extraradical mycelium (TEM), and geometric mean diameter (GMD) of soil aggregates. A total of 21 AMF species was identified. Spore density varied from 29 to 606 spores per 50 mL of soil and was higher in microaggregates and in the area with 6 years of conversion to agriculture. Total glomalin was higher between murundus in all studied aggregate classes. The area with 6 years showed lower concentration of TOC in macroaggregates (8.6 g kg -1) and in microaggregates (10.1 g kg -1). TEM was greater at the top of the murundus in all aggregate classes. GMD increased with the conversion time to agriculture. The density and diversity of arbuscular mycorrhizal spores change with the conversion of fields of murundus into agriculture.Index terms: diversity of arbuscular mycorrhizal fungi, geometric mean diameter, total glomalin, total mycelium, total organic carbon.

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“…Embora apresentem distribuição, altura e formato variáveis, Oliveira-Filho (1992) relata que os murundus normalmente apresentam de 0,2-2 m de altura e diâmetro de 0,2 a 20 m e são cobertos por vegetação arbóreo-arbustiva típica do bioma Cerrado. Em campos de murundus da região de Poconé-MT (Morais et al 2014) e da região do Pantanal do Rio Araguaia, também em Mato Grosso (Marimon et al 2012) relatam a ocorrências das espécies: Bromelia balancae Mez., Curatela americana L., Alchornea discolor Poepp., Miconia albicans (Sw.) Triana, Alibertia edulis (Rich.) A.…”

Section: Introductionunclassified

“…No Estado de Mato Grosso esses ecossistemas ocorrem amplamente nas bacias hidrográficas dos rios Xingu, Araguaia, Paraguai, Cuiabá e Guaporé, tanto em áreas de planície quanto planaltos (Eiten 1985;Marimon et al 2012). No entanto, em geral no Brasil, ainda não existe um levantamento sistemático da ocorrência dessas formas de relevo (Resende et al 2007;Marimon et al 2012).…”

Section: Introductionunclassified

“…Dessa forma, hipotetiza-se que esses atributos sejam distintos nos murundus (não inundável) e área plana circunvizinha (sazonalmente alagável). Embora haja diversos estudos comparando atributos do solo de cupinzeiros e áreas no seu entorno (Gholamis e Riazi 2012;Pinheiro et al 2013), no Brasil, em campos de murundus, tais estudos têm enfatizado mais a sua composição florística (Marimon et al 2012;Morais 2014). No entanto, há necessidade de se ampliar o conhecimento acerca desses ambientes, principalmente quanto aos processos de sequestro e deposição de carbono e de armazenamento de nutrientes, já que nos últimos anos esses ambientes vêm sofrendo impactos ambientais decorrentes, principalmente, da exploração agrícola, pecuária e expansão urbana.…”

Section: Introductionunclassified

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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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Florística dos campos de murundus do Pantanal do Araguaia, Mato Grosso, Brasil

Cited by 43 publications

References 37 publications

Dinâmica Do Carbono Orgânico De Solos Sob Pastagens Em Campos De Murundus

Dinâmica Do Carbono Orgânico De Solos Sob Pastagens Em Campos De Murundus

Arbuscular mycorrhizal fungi in soil aggregates from fields of "murundus" converted to agriculture

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

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