cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7507295.v1
title: Growth and Nutrition of Angico and Canafístula under Liming and Gypsum

description: ABSTRACT This study aimed to evaluate the effect of lime and gypsum application on the growth and nutrition of two leguminous trees. Treatments consisted of five rates of limestone, gypsum and a control treatment, with five replicates. Angico species (Anadanthera colubrina) and canafístula (Senna multijuga) were tested in a greenhouse experiment. Height and diameter were evaluated for a period of seven months. We evaluated the plants biomass, chemical composition, and number and dry weight of nodules on the roots. Lime increased pH, Ca2+ and Mg2+ content in soils, besides the neutralization of the Al3+. For Angico, basis saturation promoted the highest growth for canafístula it was 20%. Foliar nutritional content in the species, both, followed the order N&gt; Ca&gt; Mg&gt; K&gt; P. There were no correlations between plant growth and leaf content of nutrients.
DOI: 10.6084/m9.figshare.7507286
title: Tibouchina granulosa Adaptation Under Aluminum Application

description: ABSTRACT This study aimed to evaluate the adaptability of Tibouchina granulosa aluminum application. The experiment was conducted in growth chamber using randomized blocks with 5 treatments (0 mg, 8 mg, 32 mg, 64 mg and 128 mg L-1 of aluminum) and 7 repetitions. The plants were influenced by the application of aluminum in the first 30 days after application, being observed a reduction of photosynthetic pigments. However, 45 days after the treatments was observed positive effect of aluminum, also observed that the application of 8 mg L-1 gave the increase of 34%, 71%, 56% and 35% chlorophyll content a, b total and carotenoids, respectively, compared to the control treatment. Therefore, Tibouchina granulosa plants adapted to the aluminum application, also showing that this species may possibly be used in areas of reforestation projects where the soil has high concentrations of aluminum, such as the cerrado soils.
DOI: 10.6084/m9.figshare.7507286.v1
title: Tibouchina granulosa Adaptation Under Aluminum Application

description: ABSTRACT This study aimed to evaluate the adaptability of Tibouchina granulosa aluminum application. The experiment was conducted in growth chamber using randomized blocks with 5 treatments (0 mg, 8 mg, 32 mg, 64 mg and 128 mg L-1 of aluminum) and 7 repetitions. The plants were influenced by the application of aluminum in the first 30 days after application, being observed a reduction of photosynthetic pigments. However, 45 days after the treatments was observed positive effect of aluminum, also observed that the application of 8 mg L-1 gave the increase of 34%, 71%, 56% and 35% chlorophyll content a, b total and carotenoids, respectively, compared to the control treatment. Therefore, Tibouchina granulosa plants adapted to the aluminum application, also showing that this species may possibly be used in areas of reforestation projects where the soil has high concentrations of aluminum, such as the cerrado soils.
DOI: 10.6084/m9.figshare.7507292
title: Economic Risk Analysis of Two Systems of Charcoal Production

description: ABSTRACT This study aimed to analyze the economic viability of charcoal production in kilns-furnace system and “rabo-quente” kilns, as well as the investment risk simulation. The economic analysis was performed by determining the following indicators: Net Present Value (NPV), Equivalent Annual Value (EAV) and Benefit - Cost Reason (B/C). The risk analysis was performed by the Monte Carlo method. Economic indicators were viable. Kilns-furnace system evidenced to be more viable economically. Risk analysis indicated that there is probability to economical unviability of evaluated systems, 0.9% and 27.3% for kilns-furnace system and “rabo-quente” kilns, respectively. Inclusion of risk analysis in economic analysis of charcoal production projects results in greater security to infer on economic indicators.
DOI: 10.6084/m9.figshare.7507292.v1
title: Economic Risk Analysis of Two Systems of Charcoal Production

description: ABSTRACT This study aimed to analyze the economic viability of charcoal production in kilns-furnace system and “rabo-quente” kilns, as well as the investment risk simulation. The economic analysis was performed by determining the following indicators: Net Present Value (NPV), Equivalent Annual Value (EAV) and Benefit - Cost Reason (B/C). The risk analysis was performed by the Monte Carlo method. Economic indicators were viable. Kilns-furnace system evidenced to be more viable economically. Risk analysis indicated that there is probability to economical unviability of evaluated systems, 0.9% and 27.3% for kilns-furnace system and “rabo-quente” kilns, respectively. Inclusion of risk analysis in economic analysis of charcoal production projects results in greater security to infer on economic indicators.
DOI: 10.6084/m9.figshare.7507937.v1
title: Growth and Ages of Regenerating Native Species Under Plantation of Araucaria angustifolia in Parana State

description: ABSTRACT This study aimed to use dendrocronology techniques to recover the diameter growth and the average age of tree species established under an Araucaria angustifolia stand, planted in 1949 in the Irati National Forest, Paraná state. We obtained samples of 30 regenerating trees of the species Araucaria angustifolia, 24 regenerating trees of the species Cedrela fissilis, 24 regenerating trees of the species Clethra scabra, 22 regenerating trees of the species Ilex paraguariensis and 18 regenerating trees of the species Ocotea puberula. The Chapman-Richards model was used to describe the growth curves in diameter by species and curves of mean annual increment (MAI) and current annual increment (CAI) were constructed. Species showed a great potential for dendrochronological studies and the use of this technique allowed determining that natural regeneration began in 1958 and it had an average of 34 years old. The technique also allowed restore growth by species, generating annual growth rates, which identified the characteristic years of high and low growth.
DOI: 10.6084/m9.figshare.7507304
title: Soil Attributes Related with Production of Brazil Nut Tree (Bertholletia excelsa)

description: ABSTRACT In this study we analyzed the soil attributes related with variation in the fruit production of Brazil nut trees, as well as the nutritional status of the species. Trees were selected in permanent plot (Caracaraí - RR) and divided in four production classes: High, Medium, Low and Very low. In November 2009, soil and leaves samples were taken to evaluate soil fertility, soil colonization by arbuscular mycorrhizal fungi, and trees nutritional status. Trees with higher fruits production occurred associated with higher exchangeable Al in soil depth of 0-20 cm, as well as to smaller pH and bases saturation values. The discriminant variable resulting of the present study was not assumed as responsible for interfering with the productive potential of Brazil nut trees; however, it indicates most productive trees contributing with exchangeable basis removal, favoring soil acidification.
DOI: 10.6084/m9.figshare.7507304.v1
title: Soil Attributes Related with Production of Brazil Nut Tree (Bertholletia excelsa)

description: ABSTRACT In this study we analyzed the soil attributes related with variation in the fruit production of Brazil nut trees, as well as the nutritional status of the species. Trees were selected in permanent plot (Caracaraí - RR) and divided in four production classes: High, Medium, Low and Very low. In November 2009, soil and leaves samples were taken to evaluate soil fertility, soil colonization by arbuscular mycorrhizal fungi, and trees nutritional status. Trees with higher fruits production occurred associated with higher exchangeable Al in soil depth of 0-20 cm, as well as to smaller pH and bases saturation values. The discriminant variable resulting of the present study was not assumed as responsible for interfering with the productive potential of Brazil nut trees; however, it indicates most productive trees contributing with exchangeable basis removal, favoring soil acidification.
DOI: 10.6084/m9.figshare.7507937
title: Growth and Ages of Regenerating Native Species Under Plantation of Araucaria angustifolia in Parana State

description: ABSTRACT This study aimed to use dendrocronology techniques to recover the diameter growth and the average age of tree species established under an Araucaria angustifolia stand, planted in 1949 in the Irati National Forest, Paraná state. We obtained samples of 30 regenerating trees of the species Araucaria angustifolia, 24 regenerating trees of the species Cedrela fissilis, 24 regenerating trees of the species Clethra scabra, 22 regenerating trees of the species Ilex paraguariensis and 18 regenerating trees of the species Ocotea puberula. The Chapman-Richards model was used to describe the growth curves in diameter by species and curves of mean annual increment (MAI) and current annual increment (CAI) were constructed. Species showed a great potential for dendrochronological studies and the use of this technique allowed determining that natural regeneration began in 1958 and it had an average of 34 years old. The technique also allowed restore growth by species, generating annual growth rates, which identified the characteristic years of high and low growth.
DOI: 10.6084/m9.figshare.7514618
title: Effect of Ammonium Fertilization on Acclimation of Ingá to High and Moderate Irradiance

description: ABSTRACT Nitrogen can be decisive for the tolerance of plants to stress factors such as high irradiance. This work aimed to investigate the effect of ammonium fertilization during acclimation of young ingá plants under two light environments. Accumulation and partitioning of dry matter, growth, photosynthetic capacity and leaf nitrogen content were analyzed in ingá plants subjected to moderate and high irradiance of 554.4±81 µmol photons m-2 s-1 and 1941±12.3 µmol photons m-2 s-1, respectively. The highest values of dry matter, growth and photosynthesis were observed in plants subjected to moderate and high irradiance fertilized with ammonium. The specific leaf area was higher in plants under moderate irradiance, while the treatments control and N fertilization showed no differences, independent of light condition. The ammonium fertilization contributed to acclimation and dry matter accumulation of ingá under moderate and high irradiance, while plants subjected to moderate irradiance invested in strategies for energy interception (e.g. specific leaf area).
DOI: 10.6084/m9.figshare.7514618.v1
title: Effect of Ammonium Fertilization on Acclimation of Ingá to High and Moderate Irradiance

description: ABSTRACT Nitrogen can be decisive for the tolerance of plants to stress factors such as high irradiance. This work aimed to investigate the effect of ammonium fertilization during acclimation of young ingá plants under two light environments. Accumulation and partitioning of dry matter, growth, photosynthetic capacity and leaf nitrogen content were analyzed in ingá plants subjected to moderate and high irradiance of 554.4±81 µmol photons m-2 s-1 and 1941±12.3 µmol photons m-2 s-1, respectively. The highest values of dry matter, growth and photosynthesis were observed in plants subjected to moderate and high irradiance fertilized with ammonium. The specific leaf area was higher in plants under moderate irradiance, while the treatments control and N fertilization showed no differences, independent of light condition. The ammonium fertilization contributed to acclimation and dry matter accumulation of ingá under moderate and high irradiance, while plants subjected to moderate irradiance invested in strategies for energy interception (e.g. specific leaf area).
DOI: 10.6084/m9.figshare.7511771.v1
title: Epigeal Fauna and Soil Chemical Attributes in Grazing and Regeneration Areas

description: ABSTRACT The objective of this study was to evaluate the influence of natural pasture and spontaneous regeneration on soil chemical properties and epigeal fauna community using a secondary Atlantic Forest as reference. The study areas were located in Passa Vinte, Minas Gerais, Brazil. In each study area, pitfall traps were used to sample epigeal fauna in the dry and rainy seasons. Earth samples were collected at a depth of 0-5 cm in the dry and rainy seasons for analysis of chemical attributes. The pasture and regeneration areas showed an overall activity of epigeal fauna and functional groups similar to the forest area. However, the diversity evaluated by the Shannon and Pielou evenness indices and the total richness were lower than the observed in the forest. The best fertility attributes were observed in the forest and pasture areas.
DOI: 10.6084/m9.figshare.7511771
title: Epigeal Fauna and Soil Chemical Attributes in Grazing and Regeneration Areas

description: ABSTRACT The objective of this study was to evaluate the influence of natural pasture and spontaneous regeneration on soil chemical properties and epigeal fauna community using a secondary Atlantic Forest as reference. The study areas were located in Passa Vinte, Minas Gerais, Brazil. In each study area, pitfall traps were used to sample epigeal fauna in the dry and rainy seasons. Earth samples were collected at a depth of 0-5 cm in the dry and rainy seasons for analysis of chemical attributes. The pasture and regeneration areas showed an overall activity of epigeal fauna and functional groups similar to the forest area. However, the diversity evaluated by the Shannon and Pielou evenness indices and the total richness were lower than the observed in the forest. The best fertility attributes were observed in the forest and pasture areas.
DOI: 10.6084/m9.figshare.7514093
title: Relationship Between Standardized Precipitation Index (SPI) and the Fire Occurrence Reports (FOR) in Itatiaia National Park

description: ABSTRACT We evaluated fire foci data via environmental satellites, from Frontal Systems (FS) and South Atlantic Convergence Zone (SACZ) together with Standardized Precipitation Index (SPI) and Fire Occurrence Reports (FOR) in Itatiaia National Park (INP). SPI were computed with rainfall data from three stations in INP. SF and SACZ data were obtained via Climanálise. We applied independent multiple regression to FOR, SPI, SF and SACZ. Largest FOR occurred category in C class (81%), highest percentages during winter (57.2%) and spring (35.1%). The critical months to fire foci were July (17%), September (23.2%) and August (31.9%). Regardless of the season, FS (R2 = 0.75) were highlighted to SACZ (R2 = 0.43). SF conditioned 80% of variations between FOR and annual SPI index, while only 40% were due to SACZ.
DOI: 10.6084/m9.figshare.7514075
title: Application of Georadar in Areas with Different Vegetation Cover

description: ABSTRACT The Atlantic Forest degradation and fragmentation imposes the need for soil and vegetation assessments in order to estimate the environmental vulnerability of the remnants. The objective of this study was to evaluate the georadar applications in areas of Atlantic Forest under different forms of use in Pinheiral, State of Rio de Janeiro, Brazil, through penetrometer impact and ground penetrating radar (GPR). Forest fragments at different stages of regeneration, and pasture and agriculture (perennial and annual) areas were selected for study. Soil characterization was performed through measurements of soil resistance to penetration (SRP) with an impact penetrometer, and the soil properties with a ground penetrating radar (georadar). SRP increased in the forest areas at initial, medium and advanced stages from 2.0 to 2.5, 2.0 to 3.0 and 2.5 to 6.0 MPa, respectively. In the perennial and annual agriculture areas, the increase in SRP was due to differences in their mineral composition, and the lowest values found in the annual agriculture area were due to fauna activity. The employment of GPR generated information in a more rapid manner than with the use of impact penetrometer.
DOI: 10.6084/m9.figshare.7514075.v1
title: Application of Georadar in Areas with Different Vegetation Cover

description: ABSTRACT The Atlantic Forest degradation and fragmentation imposes the need for soil and vegetation assessments in order to estimate the environmental vulnerability of the remnants. The objective of this study was to evaluate the georadar applications in areas of Atlantic Forest under different forms of use in Pinheiral, State of Rio de Janeiro, Brazil, through penetrometer impact and ground penetrating radar (GPR). Forest fragments at different stages of regeneration, and pasture and agriculture (perennial and annual) areas were selected for study. Soil characterization was performed through measurements of soil resistance to penetration (SRP) with an impact penetrometer, and the soil properties with a ground penetrating radar (georadar). SRP increased in the forest areas at initial, medium and advanced stages from 2.0 to 2.5, 2.0 to 3.0 and 2.5 to 6.0 MPa, respectively. In the perennial and annual agriculture areas, the increase in SRP was due to differences in their mineral composition, and the lowest values found in the annual agriculture area were due to fauna activity. The employment of GPR generated information in a more rapid manner than with the use of impact penetrometer.
DOI: 10.6084/m9.figshare.7514057.v1
title: Physical-hydric Attributes of a Humic Inceptisol in Agroforestry on the Santa Catarina Plateau

description: ABSTRACT The present study has the objective to evaluate and compare the feasibility of agroforestry systems by physical and hydric soil attributes over time, conducted in the city of Curitibanos-SC. The treatments are as follows: SIF-mate herb (SE), SIF-fruit (SF), SIF-agricultural (SA) and Native Vegetation (NV) as a control area. Random trenches were dug in each treatment to collect soil samples with preserved and altered structure at 0.0-0.05m and 0.05-0.20m depths in the first half of 2014 and 2015, to determine physical and hydric soil attributes and the water balance. The depths were selected based on visual analysis of soil structure. Soil bulk density and microporosity provided a significant increase in its attributes over the course of time. The system remained within the available water capacity with proper water balance for the cultures, making it viable and sustainable.
DOI: 10.6084/m9.figshare.7514066.v1
title: Araucaria Stem Taper or Use of Artificial Intelligence Techniques

description: ABSTRACT The aim of this study was to compare the performance of artificial intelligence techniques with taper functions and evaluate the effect of age on this estimate. The data set was comprised of 135 observations covering the ages 6, 12, 18, 24 and 43 years of age of a stand of Araucaria angustifolia. Adjusted taper functions were Kozak Schöepfer, Hradetzky and Garay modified. The artificial intelligence models used were: ANN and tree model. The input vectors are the same variables used in taper equations and also the same arrangement with the addition of age. 70% of the data was used for adjustment and 30% for validation. The taper function Hradetzky provided the best fit. Among the models evaluated, the ANN provided the best estimates, highlighting the ANN by adding the age variable. The performance of M5P was satisfactory, however, less effective than the other techniques.
DOI: 10.6084/m9.figshare.7514057
title: Physical-hydric Attributes of a Humic Inceptisol in Agroforestry on the Santa Catarina Plateau

description: ABSTRACT The present study has the objective to evaluate and compare the feasibility of agroforestry systems by physical and hydric soil attributes over time, conducted in the city of Curitibanos-SC. The treatments are as follows: SIF-mate herb (SE), SIF-fruit (SF), SIF-agricultural (SA) and Native Vegetation (NV) as a control area. Random trenches were dug in each treatment to collect soil samples with preserved and altered structure at 0.0-0.05m and 0.05-0.20m depths in the first half of 2014 and 2015, to determine physical and hydric soil attributes and the water balance. The depths were selected based on visual analysis of soil structure. Soil bulk density and microporosity provided a significant increase in its attributes over the course of time. The system remained within the available water capacity with proper water balance for the cultures, making it viable and sustainable.
DOI: 10.6084/m9.figshare.7514066
title: Araucaria Stem Taper or Use of Artificial Intelligence Techniques

description: ABSTRACT The aim of this study was to compare the performance of artificial intelligence techniques with taper functions and evaluate the effect of age on this estimate. The data set was comprised of 135 observations covering the ages 6, 12, 18, 24 and 43 years of age of a stand of Araucaria angustifolia. Adjusted taper functions were Kozak Schöepfer, Hradetzky and Garay modified. The artificial intelligence models used were: ANN and tree model. The input vectors are the same variables used in taper equations and also the same arrangement with the addition of age. 70% of the data was used for adjustment and 30% for validation. The taper function Hradetzky provided the best fit. Among the models evaluated, the ANN provided the best estimates, highlighting the ANN by adding the age variable. The performance of M5P was satisfactory, however, less effective than the other techniques.
DOI: 10.6084/m9.figshare.7514090
title: Influence of Different Concentrations of Vermicompost in the Development of Eucalyptus and Pine Seedlings

description: ABSTRACT The objective of this study was to evaluate the effect of meat waste and cattle manure vermicomposting in the development of eucalyptus and Pinus seedlings. The experiment was conducted in a completely randomized design with eight treatments with seven repetitions. The treatments were: 0%, 20%, 40% and 60% of cattle manure added to meat waste, both vermicomposted, and 0%, 20%, 40% and 60% of the vermicompost added to commercial substrate. Stem height and diameter, shoot and root dry mass, specific surface area, Dickson quality index and the ratio between stem height and diameter were assessed. Addition of 20% and 40% of vermicompost in eucalyptus seedling cultivation promotes similar development and quality obtained with addition of 100% of commercial substrate. Pinus seedlings are not influenced by the proportions of vermicompost tested.
DOI: 10.6084/m9.figshare.7514090.v1
title: Influence of Different Concentrations of Vermicompost in the Development of Eucalyptus and Pine Seedlings

description: ABSTRACT The objective of this study was to evaluate the effect of meat waste and cattle manure vermicomposting in the development of eucalyptus and Pinus seedlings. The experiment was conducted in a completely randomized design with eight treatments with seven repetitions. The treatments were: 0%, 20%, 40% and 60% of cattle manure added to meat waste, both vermicomposted, and 0%, 20%, 40% and 60% of the vermicompost added to commercial substrate. Stem height and diameter, shoot and root dry mass, specific surface area, Dickson quality index and the ratio between stem height and diameter were assessed. Addition of 20% and 40% of vermicompost in eucalyptus seedling cultivation promotes similar development and quality obtained with addition of 100% of commercial substrate. Pinus seedlings are not influenced by the proportions of vermicompost tested.