cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7676960.v1
title: Lumber Yield of Four Native Forest Species of the Amazon Region

description: ABSTRACT The objective of this study was to evaluate the volumetric lumber yield of four native species of the Amazon Region: Cedrinho (Erisma uncinatum Warm), Cumaru ( Dipteryx odorata Aublet), Garapeira (Apuleia leiocarpa Voguel), and Cambará (Qualea paraensis Ducke). Twelve logs of each species with different diameters were randomly selected from different sawmills in northern Mato Grosso state, Brazil. Additionally, the influence of diameter on the yield of each species was evaluated through regression analysis. Among the evaluated species, Cedrinho obtained the highest yield values, followed by Garapeira. Cumaru and Cambará showed the lowest yields, and did not differ statistically. Log diameter negatively influenced lumber yield, except for Cumaru wood, which did not present a clear relation between these parameters.
DOI: 10.6084/m9.figshare.7676966
title: Simulation of Flow in the Capim River (PA) using the SWAT Model

description: ABSTRACT Flow in the Capim River watershed, located in the state of Pará, Brazil, was estimated using the Soil and Water Assessment Tool (SWAT) model in order to determine its use efficiency. The meteorological data (from 2000 to 2010) were collected from an automatic station located in the municipality of Paragominas. The pluviometric and fluviometric data are available at the National Water Agency (ANA) website. Overall results show Efficiency Coefficient (Eff) values of 0.65 (for sub-basin 5) and 0.87 for the entire investigated period. The results also show a reduction in Eff estimation error, which started from over-estimation of 219.18% and declined to underestimation of 18% (in sub-basin 5). In summary, validation of the SWAT model was successful after adjusting the sensors during the calibration phase. Thereby, this model can be used in other studies evaluating river basins.
DOI: 10.6084/m9.figshare.7676966.v1
title: Simulation of Flow in the Capim River (PA) using the SWAT Model

description: ABSTRACT Flow in the Capim River watershed, located in the state of Pará, Brazil, was estimated using the Soil and Water Assessment Tool (SWAT) model in order to determine its use efficiency. The meteorological data (from 2000 to 2010) were collected from an automatic station located in the municipality of Paragominas. The pluviometric and fluviometric data are available at the National Water Agency (ANA) website. Overall results show Efficiency Coefficient (Eff) values of 0.65 (for sub-basin 5) and 0.87 for the entire investigated period. The results also show a reduction in Eff estimation error, which started from over-estimation of 219.18% and declined to underestimation of 18% (in sub-basin 5). In summary, validation of the SWAT model was successful after adjusting the sensors during the calibration phase. Thereby, this model can be used in other studies evaluating river basins.
DOI: 10.6084/m9.figshare.7974389
title: Phytochemical Characterization and Effect of Cagaita Leaf Extracts on Aspergillus Sp.

description: ABSTRACT Fungi of the genus Aspergillus may promote damage to the physiological quality of forest seeds, and plant extracts have been used to control microflora associated with these seeds. Thus, the aim of the present work was to perform the phytochemical characterization of ethanolic and aqueous extracts obtained from Eugenia dysenterica leaves (cagaita), as well as to evaluate the effect of these extracts on the development of Aspergillus sp. isolated from Hymenaea stigonocarpa seeds (jatobá-do-cerrado). For this, qualitative phytochemical analysis of extracts was carried out and their effect on Aspergillus sp mycelial growth, sporulation and spore germination was evaluated. As a result, phenols, hydrolysable tannins, flavonols, flavanones, xanthones, flavones, free steroids and saponins were found in both extracts, which could be used in the search for new antifungal compounds in the treatment of stored forest seeds, since extracts have secondary compounds that allow inhibiting Aspergillus sp mycelial growth.
DOI: 10.6084/m9.figshare.7974389.v1
title: Phytochemical Characterization and Effect of Cagaita Leaf Extracts on Aspergillus Sp.

description: ABSTRACT Fungi of the genus Aspergillus may promote damage to the physiological quality of forest seeds, and plant extracts have been used to control microflora associated with these seeds. Thus, the aim of the present work was to perform the phytochemical characterization of ethanolic and aqueous extracts obtained from Eugenia dysenterica leaves (cagaita), as well as to evaluate the effect of these extracts on the development of Aspergillus sp. isolated from Hymenaea stigonocarpa seeds (jatobá-do-cerrado). For this, qualitative phytochemical analysis of extracts was carried out and their effect on Aspergillus sp mycelial growth, sporulation and spore germination was evaluated. As a result, phenols, hydrolysable tannins, flavonols, flavanones, xanthones, flavones, free steroids and saponins were found in both extracts, which could be used in the search for new antifungal compounds in the treatment of stored forest seeds, since extracts have secondary compounds that allow inhibiting Aspergillus sp mycelial growth.
DOI: 10.6084/m9.figshare.7942229
title: Controlled-release Fertilizer in the Production and Quality of Acacia mangium Seedlings

description: ABSTRACT In order to evaluate the use of controlled-release fertilizer in the production and quality of Acacia mangium seedlings, this experiment was conducted in randomized blocks, and treatments consisted of five levels (0, 2.5, 5.0, 7.5 and 10.0 kg m–3 of substrate) of Osmocote Plus® in six replicates. After 130 days of sowing, the production and quality variables of Acacia seedlings were analyzed. All production and quality variables, height/shoot ratio (HSH) and Dickson quality index (DQI) were influenced by the fertilizer doses. The greatest mean values of stem diameter, total height, shoot dry mass, root dry mass, the best HSH and the highest DQI, were obtained for doses ranging from 7.1 to 7.8 kg m–3 of substrate. The largest leaf area was obtained using a dose of 9.3 kg m–3 of substrate.
DOI: 10.6084/m9.figshare.7942229.v1
title: Controlled-release Fertilizer in the Production and Quality of Acacia mangium Seedlings

description: ABSTRACT In order to evaluate the use of controlled-release fertilizer in the production and quality of Acacia mangium seedlings, this experiment was conducted in randomized blocks, and treatments consisted of five levels (0, 2.5, 5.0, 7.5 and 10.0 kg m–3 of substrate) of Osmocote Plus® in six replicates. After 130 days of sowing, the production and quality variables of Acacia seedlings were analyzed. All production and quality variables, height/shoot ratio (HSH) and Dickson quality index (DQI) were influenced by the fertilizer doses. The greatest mean values of stem diameter, total height, shoot dry mass, root dry mass, the best HSH and the highest DQI, were obtained for doses ranging from 7.1 to 7.8 kg m–3 of substrate. The largest leaf area was obtained using a dose of 9.3 kg m–3 of substrate.
DOI: 10.6084/m9.figshare.7974386
title: Effect of Particle Size on Bamboo Particle Board Properties

description: ABSTRACT In this work, bamboo chips (Dendrocalamus asper) were crushed according to four particle size classes (A = -35+40 mesh; B = -40+48 mesh; C = -48+60 mesh; D = -60+65 mesh) to produce particleboards with four different compositions (100%A; 75%A + 25% B; 50%A + 50%B; 25%A + 25%B + 25%C + 25%D). Each composition was considered a treatment. The aim was to verify the effect on the physical and mechanical properties of panels. The test methods and requirements to evaluate the properties were based on NBR 14810 Brazilian standard. The results showed that the particle size used in compositions showen no significant effect on moisture content, density, thickness swelling (24 hours), internal bonding or resistance to screw withdrawal (face and side) of panels. Significant effects were verified on water absorption (2 and 24 hours), thickness swelling (2 hours), MOR and MOE to static bending.
DOI: 10.6084/m9.figshare.7974386.v1
title: Effect of Particle Size on Bamboo Particle Board Properties

description: ABSTRACT In this work, bamboo chips (Dendrocalamus asper) were crushed according to four particle size classes (A = -35+40 mesh; B = -40+48 mesh; C = -48+60 mesh; D = -60+65 mesh) to produce particleboards with four different compositions (100%A; 75%A + 25% B; 50%A + 50%B; 25%A + 25%B + 25%C + 25%D). Each composition was considered a treatment. The aim was to verify the effect on the physical and mechanical properties of panels. The test methods and requirements to evaluate the properties were based on NBR 14810 Brazilian standard. The results showed that the particle size used in compositions showen no significant effect on moisture content, density, thickness swelling (24 hours), internal bonding or resistance to screw withdrawal (face and side) of panels. Significant effects were verified on water absorption (2 and 24 hours), thickness swelling (2 hours), MOR and MOE to static bending.
DOI: 10.6084/m9.figshare.7974416
title: Dynamics of Eucalyptus Diameter Distribution in the State of Minas Gerais

description: ABSTRACT The aim of this study was to evaluate the effects of age, site, and density factors on the dynamics of eucalyptus diameter distribution. Data were obtained from a continuous forest inventory measured at different occasions, stratified according to the factors evaluated and adjusted by the three-parameter Weibull function using nonthinned clonal plots of eucalyptus stands located in the Central region of the state of Minas Gerais. In order to evaluate the diameter distribution behavior, asymmetry and kurtosis measures and graphical analysis for fitted curves were used. In general, an increase was observed in diameter amplitudes with aging, as well as with improvement of site productivity and higher densities. The number of trees decreased in the lower classes and increased in the upper classes, resulting in diameter distribution curves, being displaced to the right and flattened with aging.
DOI: 10.6084/m9.figshare.7974416.v1
title: Dynamics of Eucalyptus Diameter Distribution in the State of Minas Gerais

description: ABSTRACT The aim of this study was to evaluate the effects of age, site, and density factors on the dynamics of eucalyptus diameter distribution. Data were obtained from a continuous forest inventory measured at different occasions, stratified according to the factors evaluated and adjusted by the three-parameter Weibull function using nonthinned clonal plots of eucalyptus stands located in the Central region of the state of Minas Gerais. In order to evaluate the diameter distribution behavior, asymmetry and kurtosis measures and graphical analysis for fitted curves were used. In general, an increase was observed in diameter amplitudes with aging, as well as with improvement of site productivity and higher densities. The number of trees decreased in the lower classes and increased in the upper classes, resulting in diameter distribution curves, being displaced to the right and flattened with aging.
DOI: 10.6084/m9.figshare.7974413
title: Vegetative Propagation of Brazilian Native Species for Restoration of Degraded Areas

description: ABSTRACT Vegetative propagation by live cuttings is an alternative to reproduce native plants with the potential to be used in restoration of riparian forests and degraded areas. This propagation capacity is intrinsic to each species and is influenced by several factors, particularly the time of the year when cuttings are collected. The aim of this work was to investigate the influence of the season of the year on the vegetative propagation of live cuttings for the species Allamanda cathartica, Cephalanthus glabratus, Escallonia bifida, Ludwigia elegans, Sambucus australis, Sesbania virgata and Terminalia australis . The experiment was conducted at the Soil Bioengineering Laboratory of the Federal University of Santa Maria during two periods of the year (autumn/winter and late winter/spring). All species presented vegetative propagation capacity ranging from 23.3% to 100%, and the species generally showed better results in late winter/spring.
DOI: 10.6084/m9.figshare.7974413.v1
title: Vegetative Propagation of Brazilian Native Species for Restoration of Degraded Areas

description: ABSTRACT Vegetative propagation by live cuttings is an alternative to reproduce native plants with the potential to be used in restoration of riparian forests and degraded areas. This propagation capacity is intrinsic to each species and is influenced by several factors, particularly the time of the year when cuttings are collected. The aim of this work was to investigate the influence of the season of the year on the vegetative propagation of live cuttings for the species Allamanda cathartica, Cephalanthus glabratus, Escallonia bifida, Ludwigia elegans, Sambucus australis, Sesbania virgata and Terminalia australis . The experiment was conducted at the Soil Bioengineering Laboratory of the Federal University of Santa Maria during two periods of the year (autumn/winter and late winter/spring). All species presented vegetative propagation capacity ranging from 23.3% to 100%, and the species generally showed better results in late winter/spring.
DOI: 10.6084/m9.figshare.7974383
title: Floristic Composition Analysis of Soil Transposition in a Seasonal Forest in Rio Grande do Sul, Brazil

description: ABSTRACT This study aimed to identify the floristic composition and density of a seed bank transposed from a Seasonal Forest fragment in Rio Grande do Sul. The seed bank of the (BSI) fragment center and edge (BSII) of another forest fragment was also evaluated, both at medium to advanced successional stages. The seed bank was deposited in Brown-Gray Argisol and Red Argisol using exposed soil plots as control. ANOVA followed by Tukey test (p&lt;0.05) were used to compare treatments for density and species richness. The density of individuals did not differ between treatments. Species richness was higher for BSI and BSII treatments in relation to control. The floristic composition presented different life forms, but was mainly composed of herbaceous species. It was concluded that the seed bank from the two donor areas contributed to the expansion of species richness in two soil types.
DOI: 10.6084/m9.figshare.7974383.v1
title: Floristic Composition Analysis of Soil Transposition in a Seasonal Forest in Rio Grande do Sul, Brazil

description: ABSTRACT This study aimed to identify the floristic composition and density of a seed bank transposed from a Seasonal Forest fragment in Rio Grande do Sul. The seed bank of the (BSI) fragment center and edge (BSII) of another forest fragment was also evaluated, both at medium to advanced successional stages. The seed bank was deposited in Brown-Gray Argisol and Red Argisol using exposed soil plots as control. ANOVA followed by Tukey test (p&lt;0.05) were used to compare treatments for density and species richness. The density of individuals did not differ between treatments. Species richness was higher for BSI and BSII treatments in relation to control. The floristic composition presented different life forms, but was mainly composed of herbaceous species. It was concluded that the seed bank from the two donor areas contributed to the expansion of species richness in two soil types.
DOI: 10.6084/m9.figshare.7974404
title: Growth of Eremanthus erythropappus (DC.) MacLeish in Different Planting Spacings

description: ABSTRACT This study aimed to evaluate the growth of Eremanthus erythropappus (DC.) MacLeish submitted to different planting spacing and growth modelling based on the diameter and crown area projection, as well as to identify the best management strategy to be applied to control the competition, period and intensity of thinning. The evaluated planting spacings were: 1.5 × 1.5 m; 1.5 × 2.0 m; 1.5 × 2.5 m and 1.5 × 3.0 m. Diametric growth modelling in function of the age and crown area projection according to the mixed models methodology was efficient and the individual tree modelling allowed for defining a correct thinning prescription for tree plantations in relation to the percentage of removal needed at each spacing, thus permitting the trees to grow free from competition and produce trees with larger diameters.
DOI: 10.6084/m9.figshare.7974404.v1
title: Growth of Eremanthus erythropappus (DC.) MacLeish in Different Planting Spacings

description: ABSTRACT This study aimed to evaluate the growth of Eremanthus erythropappus (DC.) MacLeish submitted to different planting spacing and growth modelling based on the diameter and crown area projection, as well as to identify the best management strategy to be applied to control the competition, period and intensity of thinning. The evaluated planting spacings were: 1.5 × 1.5 m; 1.5 × 2.0 m; 1.5 × 2.5 m and 1.5 × 3.0 m. Diametric growth modelling in function of the age and crown area projection according to the mixed models methodology was efficient and the individual tree modelling allowed for defining a correct thinning prescription for tree plantations in relation to the percentage of removal needed at each spacing, thus permitting the trees to grow free from competition and produce trees with larger diameters.
DOI: 10.6084/m9.figshare.7974653
title: Does the Addition of Cotton Wastes Affect the Properties of Particleboards?

description: ABSTRACT A wide range of materials for the development of new products can be obtained from natural resources. Good examples of these materials are lignocellulosic wastes, which are a good alternative for the production of particleboards. This study aimed to evaluate the feasibility of using cotton wastes in association to eucalyptus particles in the production of particleboards. Cotton waste proportions used were 0, 10, 20 and 30%. Urea formaldehyde (UF) adhesive was applied at 12%, based on dry the weight of particles. Physical and mechanical tests were performed in order to evaluate panels. Water Absorption (2 and 24 h) and Internal Bond (IB) showed not significant effect with increased percentage of cotton waste. Thickness Swelling (2 and 24 h) of particleboards increased with increased percentage of waste material. The Modulus of Elasticity for cotton waste particleboards ranged from 726.47 ± 99.98 to 205.12 ± 66.24 MPa, while the Modulus of Rupture ranged from 8.63 ± 1.39 to 3.87 ± 0.75 MPa. According to results, cotton wastes could be added to particleboards up to the percentage of 9%, being indicated for the manufacture of some types of furniture such as doors and sides.
DOI: 10.6084/m9.figshare.7974653.v1
title: Does the Addition of Cotton Wastes Affect the Properties of Particleboards?

description: ABSTRACT A wide range of materials for the development of new products can be obtained from natural resources. Good examples of these materials are lignocellulosic wastes, which are a good alternative for the production of particleboards. This study aimed to evaluate the feasibility of using cotton wastes in association to eucalyptus particles in the production of particleboards. Cotton waste proportions used were 0, 10, 20 and 30%. Urea formaldehyde (UF) adhesive was applied at 12%, based on dry the weight of particles. Physical and mechanical tests were performed in order to evaluate panels. Water Absorption (2 and 24 h) and Internal Bond (IB) showed not significant effect with increased percentage of cotton waste. Thickness Swelling (2 and 24 h) of particleboards increased with increased percentage of waste material. The Modulus of Elasticity for cotton waste particleboards ranged from 726.47 ± 99.98 to 205.12 ± 66.24 MPa, while the Modulus of Rupture ranged from 8.63 ± 1.39 to 3.87 ± 0.75 MPa. According to results, cotton wastes could be added to particleboards up to the percentage of 9%, being indicated for the manufacture of some types of furniture such as doors and sides.
DOI: 10.6084/m9.figshare.7974398
title: Biomass Deposition and Chemical Composition of Litterfall in Clonal Eucalyptus Plantations

description: ABSTRACT Productivity in clonal eucalyptus plantations depends on the genetic material and on the demand and cycling of nutrients, making studies that evaluate these requirements necessary. The aim of this study was to evaluate the effect of management (with and without thinning) on the deposition, chemical composition and nutrient contribution in litter at different clonal or stallion eucalyptus plantations. The experiment was conducted under a subdivided plot design for comparison of “clone” and “thinning” treatments. Plots were composed of eight different clonal and eucalyptus seed plantations, with subplots being areas where thinning was performed and areas without thinning. Litter deposition pattern associated to seasons was observed, with higher values in the spring and summer. The leaf fraction was more representative in relation to nutrients. Deposition values were close in most plantations. Nutritional contents were higher in leaves of areas with thinning in relation to the other areas.
DOI: 10.6084/m9.figshare.7974398.v1
title: Biomass Deposition and Chemical Composition of Litterfall in Clonal Eucalyptus Plantations

description: ABSTRACT Productivity in clonal eucalyptus plantations depends on the genetic material and on the demand and cycling of nutrients, making studies that evaluate these requirements necessary. The aim of this study was to evaluate the effect of management (with and without thinning) on the deposition, chemical composition and nutrient contribution in litter at different clonal or stallion eucalyptus plantations. The experiment was conducted under a subdivided plot design for comparison of “clone” and “thinning” treatments. Plots were composed of eight different clonal and eucalyptus seed plantations, with subplots being areas where thinning was performed and areas without thinning. Litter deposition pattern associated to seasons was observed, with higher values in the spring and summer. The leaf fraction was more representative in relation to nutrients. Deposition values were close in most plantations. Nutritional contents were higher in leaves of areas with thinning in relation to the other areas.
DOI: 10.6084/m9.figshare.7974896.v1
title: Soil Seed Bank at Different Depths and Light Conditions in a Dry Forest in Northern Minas Gerais

description: ABSTRACT The soil seed bank is an important natural regeneration strategy for plant communities and can determine floristic composition after disturbances. The aim of the present study was to evaluate the seed bank richness and abundance at different soil depths and under different light conditions in a dry forest. Litter and soil samples were collected at depths of 0-5 and 5-10 cm and submitted to two light conditions (light and shady). In total, 1,725 individuals from 85 species and 19 families emerged. Significant differences in richness between soil depths were observed, being greater at 0-5 cm, while abundance was similar. There were no variations in richness or abundance of germinated seeds between light conditions. Malvaceae and Verbenaceae families were the most representative in this study.