Dinâmica Dos Atributos Físico-Químicos E Variação Sazonal Dos Estoques De Carbono No Solo Em Diferentes Fitofisionomias Do Pantanal Norte Mato-Grossense

Mello, Juliana Milesi; Couto, Eduardo Guimarães; Amorim, Ricardo Santos Silva; Chig, Léo Adriano; Johnson, Mark S.; Lobo, Francisco

doi:10.1590/0100-67622015000200012

Cited by 23 publications

(12 citation statements)

References 24 publications

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“…Based on the universe of 1,000 values, it was possible to determine the upper and lower limits of the confidence interval of the mean at 95% probability. This procedure was useful to further compare means (Mello et al, 2015): when there were common values within the confidence intervals (indicated by error bars), means did not differ from each other; however, when there was the absence of common values, they differed significantly, at 5% probability.…”

Section: Methodsmentioning

confidence: 99%

Physical-hydraulic soil attributes in an integrated production system with different “paricá” forest component arrangements

Magalhães

Freddi

Lange

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to compare the structural quality and water retention curve of a Haplustox under single, double, and triple "paricá" (Ochroma pyramidale) lines in an integrated production system at 50 months of implantation. Soil was collected from five sampling points considering the distances from the tree lines. Undisturbed samples were collected from the 0.00-0.10 and 0.10-0.20-m layers in order to assess porosity, density, soil penetration resistance, soil water retention curve, and the "S" index. The forest arrangement based on three paricá lines promoted better soil physical conditions than the system using single lines. The main changes were recorded in the 0.10-0.20-m layer, with increased microporosity and decreased cryptoporosity and resistance to penetration. The arrangements using single and double paricá lines result in higher volume of available water and greater soil compaction.Index terms: Ochroma pyramidale, ICLF, physical quality of the soil, retention curve, water in the soil. Atributos físico-hídricos do solo em sistema integrado de produção com diferentes arranjos do componente florestal paricáResumo -O objetivo deste trabalho foi comparar a qualidade estrutural e a curva de retenção de água de um Latossolo Vermelho-Amarelo sob arranjos de linhas simples, duplas e triplas de paricá (Ochroma pyramidale), em um sistema integrado de produção com 50 meses de implantação. O solo foi coletado em cinco pontos de amostragem em relação à distância do renque das árvores. Foram coletadas amostras indeformadas nas camadas de 0,00-0,10 e 0,10-0,20 m para avaliar porosidade, densidade, resistência do solo à penetração, curva de retenção de água no solo e índice "S". O arranjo florestal com três linhas de paricá promoveu melhores condições físicas ao solo em comparação ao renque de linha simples. As principais alterações ocorreram na camada de 0,10-0,20 m, com aumento da microporosidade e diminuição da criptoporosidade e da resistência à penetração. Os arranjos com paricá em linhas simples e dupla resultam em maiores volumes de água indisponíveis e compactação ao solo.Termos para indexação: Ochroma pyramidale, ILPF, qualidade física do solo, curva de retenção, água do solo.

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Section: Methodsmentioning

confidence: 99%

Physical-hydraulic soil attributes in an integrated production system with different “paricá” forest component arrangements

Magalhães

Freddi

Lange

et al. 2018

Pesq. agropec. bras.

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“…Although poor in nutrients, Ipucas soils were characterized by higher organic matter content on the surface. e di erence in OM and C organic content present between the studied depths is expected in flooded environments due to the sediment deposition process promoted by the flooding that enriches the surface layers with leachate from adjacent ecosystems [40] and that are added to the accumulation of senescent plant matter in the previous dry season. Organic matter directly and indirectly controls various soil attributes [41] because it improves the physical conditions of the substrate, increases the soil microbiota, retains moisture, and controls the thermal range, hydraulic conductivity and density, resulting in increased soil cation exchange capacity and nutrient retention [42][43][44][45][46].…”

Section: Discussionmentioning

confidence: 98%

Spatial Variability of the Physicochemical Properties of Soils from Seasonally Flooded Forest Fragments on a Tropical Plain

Barbosa

Fernandes

Siqueira

et al. 2019

Applied and Environmental Soil Science

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Flooded ecosystems are conditioned to seasonal floods that promote specific soil conditions, such as low oxygen, hydromorphism, and peculiar chemical reactions. These environments are dependent on flood pulses that determine specific ecological conditions. Ipucas are seasonally flooded discontinuous forest patches that occur exclusively in the Araguaia Plain in Central Brazil. They are located 0.40 to 1.20 m lower than the surrounding plain, which promotes an accumulation of rainwater for five to six months of the year, being entirely or partially dry during the dry season. The aim of this study was to evaluate the horizontal (centre and edge) and vertical (depths: 0–0.20 m and 0.20–0.40 m) variability of physicochemical parameters in Ipucas soils, attempting to establish the importance of flood pulses and the leaching of surrounding areas in soil formation and composition. Samples were collected during the dry season in three Ipucas of similar size and circularity using a Dutch auger. The results reveal that flood pulses promote the deposition of sediments eroded from the surrounding plain, homogenizing the characteristics of the surface soil, from the edge to the centre of the Ipucas. However, biogeochemical processes, also linked to temporary flooding, account for the differences between the surface and deeper soil horizons because anoxic conditions during flooding promote chemical reactions characteristic of anaerobic environments, modifying the pH and organic matter content, in addition to the gleying of soils subjected to flooding, which are then covered by sediments after the dry season. Finally, Ipucas soils are susceptible to anthropic changes and are dependent on seasonal flood pulses.

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“…The internal CO 2 concentration of plants is directly influenced by photosynthesis and is extremely important for the productivity of terrestrial ecosystems (Mello et al 2015). During the process of CO 2 assimilation plants absorb carbon dioxide and transform it into biomass, using water and sunlight, and release O 2 into the atmosphere (Taiz et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation in gas exchange by plants of Erythroxylum simonis Plowman

et al. 2018

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Erythroxylum simonis is an understory species found in Northeast Brazil. Due to its shaded habitat, E. simonis is subjected to seasonal oscillations of the environment, to which it must respond ecophysiologically. Th e objective of this study was to evaluate the eff ects of seasonality on the ecophysiology of E. simonis in a fragment of Seasonal Semideciduous Forest. Leaf area index, visible sky fraction and photosynthetically active radiation were measured for 10 individuals during the dry and rainy seasons. Soil moisture, temperature and monthly precipitation were measured, as well as photosynthetic rate, stomatal conductance, internal CO 2 concentration, transpiration, instantaneous water use effi ciency, instantaneous carboxylation effi ciency and chlorophyll content. Ecophysiological variables were correlated with environmental variables, with a greater association of rainfall and soil moisture with stomatal conductance, transpiration and photosynthetic rate, indicating that water availability has an eff ect on the ecophysiology of E. simonis. With the exception of instantaneous carboxylation effi ciency, gas exchange exhibited signifi cant diff erences among the months studied, with the highest values being for months with greater water availability, thus showing that the ecophysiology of the species responds to seasonal changes throughout the year.

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Dinâmica Dos Atributos Físico-Químicos E Variação Sazonal Dos Estoques De Carbono No Solo Em Diferentes Fitofisionomias Do Pantanal Norte Mato-Grossense

Abstract: RESUMO -O bioma DYNAMICS OF CHEMICAL AND PHYSICAL ATTRIBUTES AND SEASONAL VARIATION OF SOIL CARBON STOCKS IN DIFFERENT VEGETATION TYPES OF NORTH PANTANAL OF MATO GROSSO

Cited by 23 publications

References 24 publications

Physical-hydraulic soil attributes in an integrated production system with different “paricá” forest component arrangements

Physical-hydraulic soil attributes in an integrated production system with different “paricá” forest component arrangements

Spatial Variability of the Physicochemical Properties of Soils from Seasonally Flooded Forest Fragments on a Tropical Plain

Seasonal variation in gas exchange by plants of Erythroxylum simonis Plowman

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