Prática De Identificação E Classificação De Solos

Santos, José Marques dos; Tavares, Maciel Alves; Filho, Alan José de Moura Silva; Domingues, Luan da Costa Avelar; Paiva, Christianne Torres de

doi:10.31692/2526-7701.iicointerpdvagro.2017.00526

Cited by 4 publications

(7 citation statements)

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“…Argissolos are soils with clearly differentiated horizons, a clay content of 50% more in the subsurface horizon than in the horizon above it, variable depth, imperfect drainage and strong to moderate acidity. The Espodossolos order has the greatest sandy texture among the orders, but it has the lowest water retention, explaining the reason for the low VSM values in the EAC and ERJ results; this order also has low-fertility soils, low base saturation and low cationic capacity, a characteristic that is also evident in the order Gleissolos, although the soils of this order are considered of good fertility in terms of performing corrections for the exercise of agriculture [18].…”

Section: Local Analysis Acre and Rio De Janeiromentioning

confidence: 94%

“…To use practical terminology covering the two large areas of forest that predominate in the continent, in the present study, the denomination of predominantly equatorial regime forests (FRPEs) was selected to refer to the forests of the Amazon and the north of the continent, and predominantly tropical forests (FRPTs) were to refer to the group of forests composed mainly of the Atlantic Forest near the Tropic of Capricorn (Figure 1). To offer a perspective on the local scale, the territorial units of the Brazilian states of Acre (A), with an area of 164,123,964 km 2 , and Rio de Janeiro (B), with an area of 43,750,427 km 2 , according to data from the Brazilian Institute of Geography and Statistics, were selected to analyze the number of fire foci and the volumetric soil moisture (VSM) (m 3 m −3 ) relative to the existing soil units in each state (Figure 1), according to the classification of the Brazilian System of Classification of Soil (SiBCS) [18].…”

Section: Study Areamentioning

confidence: 99%

“…The State of Rio de Janeiro (ERJ) borders the Atlantic Ocean in the south and southeast, the state of Espírito Santo in the northeast, the state of Minas Gerais in the northwest, and the state of São Paulo in the southwest. The altitude in this state varies To offer a perspective on the local scale, the territorial units of the Brazilian states of Acre (A), with an area of 164,123,964 km 2 , and Rio de Janeiro (B), with an area of 43,750,427 km 2 , according to data from the Brazilian Institute of Geography and Statistics, were selected to analyze the number of fire foci and the volumetric soil moisture (VSM) (m 3 m −3 ) relative to the existing soil units in each state (Figure 1), according to the classification of the Brazilian System of Classification of Soil (SiBCS) [18].…”

Section: Study Areamentioning

confidence: 99%

“…The behavior of the maps created based on VSM for Biome 1 showed consistency with the results of the climatic data on air temperature and precipitation. Target areas of a large proportion of studies conducted to date assessing the state of the tropical longleaf forest biomes in AS were located in Brazil [18,19,[37][38][39][40][41]. In Brazil, approximately 60% of the Amazon Forest and practically all of the Atlantic Forest constitute most of Biome 1 in AS.…”

Section: Climate Of the "Tropical Large Leaf Forest" Biome And Vsmmentioning

confidence: 99%

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Past and Future Responses of Soil Water to Climate Change in Tropical and Subtropical Rainforest Systems in South America

et al. 2023

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The present study aimed to contribute to the diagnosis and advance the knowledge of the impacts of land use change and climate change on the tropical longleaf forest biome at the continental scale in South America (Biome 1 according to the WWF classification) for realizing scientific progress in the search for convincing strategies and actions by different actors for the preservation of forests in the continent. The status and climate of the area, which harbors the tropical longleaf forests of South America, were assessed. Moreover, volumetric soil moisture (VSM) was evaluated through maps and simulation using the autoregressive integrated moving average model (ARIMA). Furthermore, future climate scenarios were predicted based on El Niño–Southern Oscillation phenomena, meteorological systems, and scientific evidence, such as the shared socioeconomic pathways (SSPs) and sociopolitical dynamics evident in the region from the case analysis of the Brazilian states of Acre and Rio de Janeiro. An increase was noted in the temperature and range of precipitation variation in the biome. ARIMA analysis indicated changes of up to 0.24 m3 m−3 and an increased range of future VSM values. The December–January–February (DJF) quarter recorded the highest VSM median with the measurement scale of 0.05 to 0.44 m3 m−3, while the June–July–August (JJA) quarter recorded the lowest value. The regions of the biome with the lowest VSM values included southern Amazon (Ecuador, Peru, and the Brazilian states of Acre, Mato Grosso, Pará, and Maranhão), Brazilian Atlantic Forest, Southeast Region, and the Brazilian state of Bahia.

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Section: Local Analysis Acre and Rio De Janeiromentioning

confidence: 94%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Climate Of the "Tropical Large Leaf Forest" Biome And Vsmmentioning

confidence: 99%

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Past and Future Responses of Soil Water to Climate Change in Tropical and Subtropical Rainforest Systems in South America

et al. 2023

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“…SP80–3280, susceptible to water deficit [48]. Plants of a similar size (pruned to one stalk per plant) of each cultivar were grown in plastic pots (15 L) filled with 13 kg of eutrophic red-yellow argisoil [49] under greenhouse conditions. Soil fertilization was performed according to chemical analysis by adding 5 g of 20–00-20 (NPK) per pot at 135 DAE (days after emergence) and again at 165 DAE [50].…”

Section: Methodsmentioning

confidence: 99%

Decarboxylation mechanisms of C4 photosynthesis in Saccharum spp.: increased PEPCK activity under water-limiting conditions

et al. 2019

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Background C4 plants have been classified into three subtypes based on the enzymes used to decarboxylate C4 acids in the bundle sheath cells (NADP-ME, NAD-ME and PEPCK pathways). Evidences indicate that, depending on environmental factors, C4 plants may exhibit a certain degree of flexibility in the use of the decarboxylation mechanisms. In this context, the objective was to extend the knowledge on the degree of flexibility between the pathways of decarboxylation in sugarcane, a NADP-ME species, at different levels of water deficit. Results An experiment was carried out with two cultivars - RB92579 (tolerant to water deficit) and SP80–3280 (susceptible to water deficit) subjected to moderate level (− 1.5 to − 1.8 MPa), severe level (below − 2.0 MPa) and recovery (48 h after rehydration) and changes in the activities of the enzymes involved in the three C4 mechanisms and in gene expression were investigated. Our results showed that sugarcane uses the PEPCK pathway as a decarboxylation mechanism in addition to the NADP-ME, which was more evident under water deficit conditions for both cultivars. Conclusions The results obtained here, show that sugarcane increases the use of the PEPCK pathway as a decarboxylation mechanism, in addition to the NADP-ME pathway, under conditions of water deficit, particularly in the tolerant cultivar. Electronic supplementary material The online version of this article (10.1186/s12870-019-1745-7) contains supplementary material, which is available to authorized users.

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Dolomitic lime and silicate in no‐till: Nutritional status, soil fertility, and soybean agronomic performance

Cassim,

Rodrigues,

Besen

et al. 2024

Soil Science Soc of Amer J

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Limestone is the most widely used agricultural input for soil acidity correction and calcium (Ca) and magnesium (Mg) fertilization. However, other materials have the potential to fulfill these purposes, such as steel slags, also known as silicates. Silicates have higher solubility than limestone, serving as agents for increase pH in no‐till, in addition to being a source of Ca, Mg, and silicon (Si). This study aimed to compare the effects of surface application of dolomitic lime and calcium magnesium silicate on soil chemical properties, soybean [Glycine max (L.) Merr.] nutritional status, and grain yield under no‐till. The experiment was installed in the northwest Paraná State, Brazil, on a Rhodic Eutrustox. Lime and silicate rates were applied by broadcasting before the sowing of soybean. Silicate treatment increases soil Ca2+, pH, and base saturation up to a depth of 0.10 m. By contrast, liming effects on soil chemistry were restricted to the 0.05 m top layer after 24 months of application. The acidity correction and Ca2+ supply to greater soil depths and the increased leaf Si as a beneficial element provided by silicate treatment contributed to increasing soybean yield in the 2018/2019 and 2019/2020 seasons. Lime application, regardless of the rate, did not improve soybean yield. Waste from the steel industry can be used as acidity correctives and source of Si, Ca, and Mg, improving the agronomic performance of soybean.

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Prática De Identificação E Classificação De Solos

Cited by 4 publications

References 0 publications

Past and Future Responses of Soil Water to Climate Change in Tropical and Subtropical Rainforest Systems in South America

Past and Future Responses of Soil Water to Climate Change in Tropical and Subtropical Rainforest Systems in South America

Decarboxylation mechanisms of C4 photosynthesis in Saccharum spp.: increased PEPCK activity under water-limiting conditions

Dolomitic lime and silicate in no‐till: Nutritional status, soil fertility, and soybean agronomic performance

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