cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7518035
title: Litter Contribution and Decomposition in the Caatinga in Southern Piauí State, Brazil

description: Studies on nutrient cycling in the Caatinga biome can support a better understanding of the ecological processes in that ecosystem. This study aimed to improve information related to the amount of organic material for litter formation, its chemical composition and required time for decomposition in a study area located in the Caatinga biome, municipality of Santa Luz, Piaui state, Brazil. The litterfall production was monthly collected between December 2010 and November 2011 using 10 collectors. The collected material was partially used as samples for soil analysis (N, K, P, lignin and tannin). The decomposition was assessed using litter bags. Our results indicate that litter deposition increases as precipitation decreases, mainly the leaf fraction. The greatest soil nutrient content was Nitrogen. It seems that the high concentrations of lignin and tannin in the Caatinga litter were responsible for decreasing the decomposition rate of the leaf litter.
DOI: 10.6084/m9.figshare.7518035.v1
title: Litter Contribution and Decomposition in the Caatinga in Southern Piauí State, Brazil

description: Studies on nutrient cycling in the Caatinga biome can support a better understanding of the ecological processes in that ecosystem. This study aimed to improve information related to the amount of organic material for litter formation, its chemical composition and required time for decomposition in a study area located in the Caatinga biome, municipality of Santa Luz, Piaui state, Brazil. The litterfall production was monthly collected between December 2010 and November 2011 using 10 collectors. The collected material was partially used as samples for soil analysis (N, K, P, lignin and tannin). The decomposition was assessed using litter bags. Our results indicate that litter deposition increases as precipitation decreases, mainly the leaf fraction. The greatest soil nutrient content was Nitrogen. It seems that the high concentrations of lignin and tannin in the Caatinga litter were responsible for decreasing the decomposition rate of the leaf litter.
DOI: 10.6084/m9.figshare.7517498
title: Seedling Morphology and Control of Pathogens in Seeds of Cordia trichotoma

description: This paper aims to describe the morphological development of seedlings of Cordia trichotoma, determine the influence of seed and substrate treatments in reducing the incidence of pathogens, and evaluate seed germination. A sanity test was performed using a 2×4 two-factor design (two types of processing and four seed treatment methods). The germination test represented a 2×4×3 three-factor design (two types of processing, four seed treatments, and three substrates). Germination started on the 18th day after the test was implemented for both samples. The seeds are of epigeous germination with phanerocotyledonous seedlings. The germination rate of seeds is higher when the whole perianth is removed, regardless of the substrate and treatment used. Treatment with Captan® reduced the fungal incidence of the genera Alternaria spp., Trichoderma spp., Rhizopus spp.
DOI: 10.6084/m9.figshare.7517498.v1
title: Seedling Morphology and Control of Pathogens in Seeds of Cordia trichotoma

description: This paper aims to describe the morphological development of seedlings of Cordia trichotoma, determine the influence of seed and substrate treatments in reducing the incidence of pathogens, and evaluate seed germination. A sanity test was performed using a 2×4 two-factor design (two types of processing and four seed treatment methods). The germination test represented a 2×4×3 three-factor design (two types of processing, four seed treatments, and three substrates). Germination started on the 18th day after the test was implemented for both samples. The seeds are of epigeous germination with phanerocotyledonous seedlings. The germination rate of seeds is higher when the whole perianth is removed, regardless of the substrate and treatment used. Treatment with Captan® reduced the fungal incidence of the genera Alternaria spp., Trichoderma spp., Rhizopus spp.
DOI: 10.6084/m9.figshare.7515869
title: Effect of Hydrogel and Urea on the Seedling Production of Handroanthus ochraceus (Cham.) Mattos

description: This study evaluated the production of seedlings of Handroanthus ochraceus (Cham.) Mattos submitted to different doses of hydrogel and nitrogen fertilization in greenhouse. The experiment was conducted in a completely randomized design in a factorial with five concentrations of hydrogel (0 to 4 g) and six fertilization treatments (0 to 5 g), totaling 30 treatments and five replicates composed of four seedlings. We evaluated height; stem diameter; number of leaves; dry mass of shoot and root; total dry mass; ratios between height/diameter, height/shoot dry mass, and shoot/root; Dickson quality index; and increase in height and diameter in three steps. Data were submitted to analysis of variance (p &lt; 0.05) and regression. The different treatments have generated different responses and, in general, positively influenced the growth and quality of seedlings. The initial 80 days under shade provided greater growth in height and diameter of seedlings.
DOI: 10.6084/m9.figshare.7515869.v1
title: Effect of Hydrogel and Urea on the Seedling Production of Handroanthus ochraceus (Cham.) Mattos

description: This study evaluated the production of seedlings of Handroanthus ochraceus (Cham.) Mattos submitted to different doses of hydrogel and nitrogen fertilization in greenhouse. The experiment was conducted in a completely randomized design in a factorial with five concentrations of hydrogel (0 to 4 g) and six fertilization treatments (0 to 5 g), totaling 30 treatments and five replicates composed of four seedlings. We evaluated height; stem diameter; number of leaves; dry mass of shoot and root; total dry mass; ratios between height/diameter, height/shoot dry mass, and shoot/root; Dickson quality index; and increase in height and diameter in three steps. Data were submitted to analysis of variance (p &lt; 0.05) and regression. The different treatments have generated different responses and, in general, positively influenced the growth and quality of seedlings. The initial 80 days under shade provided greater growth in height and diameter of seedlings.
DOI: 10.6084/m9.figshare.7509470
title: Characteristic Air Drying Curve for Tectona grandis and Acacia mangium Lumber

description: Air drying is a simple, low-cost alternative that can be used in the pre-drying or definitive drying of several woods. The objective of the present work was to study the behavior of the characteristic air drying curve for Acacia mangium and Tectona grandis lumber. Fifteen-year-old trees of each species were cut into logs of approximately 3 m in length. The logs were sawn using a tangential cut system to obtain 3 cm-thick boards. After the wood pile was mounted for drying, the moisture content of samples was determined, and monitoring occurred through the periodic weighing of the control samples. It was possible to observe that, under the environmental conditions imposed, Acacia mangium boards dried more slowly than Tectona grandis boards. A separate analysis of the drying curve for each species is recommended.
DOI: 10.6084/m9.figshare.7509470.v1
title: Characteristic Air Drying Curve for Tectona grandis and Acacia mangium Lumber

description: Air drying is a simple, low-cost alternative that can be used in the pre-drying or definitive drying of several woods. The objective of the present work was to study the behavior of the characteristic air drying curve for Acacia mangium and Tectona grandis lumber. Fifteen-year-old trees of each species were cut into logs of approximately 3 m in length. The logs were sawn using a tangential cut system to obtain 3 cm-thick boards. After the wood pile was mounted for drying, the moisture content of samples was determined, and monitoring occurred through the periodic weighing of the control samples. It was possible to observe that, under the environmental conditions imposed, Acacia mangium boards dried more slowly than Tectona grandis boards. A separate analysis of the drying curve for each species is recommended.
DOI: 10.6084/m9.figshare.7514621
title: Yield and Physical Characteristics of Neem (Azadirachta indica) and Castor (Ricinus communis) Oils

description: This work aimed to evaluate the yield and viscosity of neem (Azadirachta indica) and castor (Ricinus communis) oils. Neem fruits were collected at the ‘Núcleo de Pesquisa do Semi-Árido’, municipality of Patos, Paraíba state, and castor plants were collected along the Espinharas River margins, municipalities of Patos and Igaracy, Paraíba state, Brazil. The fruits were beneficiated at the Forest Products Technology Laboratory in Patos. Seed samples were used for determination of moisture content and yield of oils from the studied species. The oils were extracted with absolute ethyl alcohol and employed in the preparation of neem and castor oil solutions. The density and viscosity of solutions were determined. Castor oil presented lower moisture content and yield compared with neem oil. The density and viscosity of neem oil were lower than those of castor oil. A larger amount of castor oil provided an increase in the density and viscosity of the prepared solutions.
DOI: 10.6084/m9.figshare.7514621.v1
title: Yield and Physical Characteristics of Neem (Azadirachta indica) and Castor (Ricinus communis) Oils

description: This work aimed to evaluate the yield and viscosity of neem (Azadirachta indica) and castor (Ricinus communis) oils. Neem fruits were collected at the ‘Núcleo de Pesquisa do Semi-Árido’, municipality of Patos, Paraíba state, and castor plants were collected along the Espinharas River margins, municipalities of Patos and Igaracy, Paraíba state, Brazil. The fruits were beneficiated at the Forest Products Technology Laboratory in Patos. Seed samples were used for determination of moisture content and yield of oils from the studied species. The oils were extracted with absolute ethyl alcohol and employed in the preparation of neem and castor oil solutions. The density and viscosity of solutions were determined. Castor oil presented lower moisture content and yield compared with neem oil. The density and viscosity of neem oil were lower than those of castor oil. A larger amount of castor oil provided an increase in the density and viscosity of the prepared solutions.
DOI: 10.6084/m9.figshare.7519391
title: Substratum Quality Indicators for Monitoring Revegetated Mining Areas

description: Indicators of substratum quality for monitoring the state of rehabilitation in mining areas were selected on the basis of a study conducted in an operating industrial sand mine. Four study plots were established in decommissioned tailing ponds restored with native plant species for the past 14 years, allowing for 10+ years of simulated monitoring. Substratum samples were collected to measure several physical and chemical properties, while plant development was assessed using conventional parameters. A multivariate covariance analysis led to the selection of soil density, contents of organic matter and phosphorous, as well as soil pH, as suitable variables with ample possibilities to be used as indicators for the conditions studied. Measuring these parameters is a practical, affordable, easy-to-use tool to monitor the evolution of environmental rehabilitation and obtain quantitative parameters that allow for an objective assessment of the results.
DOI: 10.6084/m9.figshare.7519391.v1
title: Substratum Quality Indicators for Monitoring Revegetated Mining Areas

description: Indicators of substratum quality for monitoring the state of rehabilitation in mining areas were selected on the basis of a study conducted in an operating industrial sand mine. Four study plots were established in decommissioned tailing ponds restored with native plant species for the past 14 years, allowing for 10+ years of simulated monitoring. Substratum samples were collected to measure several physical and chemical properties, while plant development was assessed using conventional parameters. A multivariate covariance analysis led to the selection of soil density, contents of organic matter and phosphorous, as well as soil pH, as suitable variables with ample possibilities to be used as indicators for the conditions studied. Measuring these parameters is a practical, affordable, easy-to-use tool to monitor the evolution of environmental rehabilitation and obtain quantitative parameters that allow for an objective assessment of the results.
DOI: 10.6084/m9.figshare.7512695.v1
title: Evaluation of Forest Restoration in a Degraded Permanent Preservation Area in Santa Catarina State, Brazil

description: This study evaluated the process of restoration in a degraded Permanent Preservation Area (PPA) in the municipality of Pouso Redondo, Santa Catarina state, six years after the initial plantation of trees and isolation of the area. Tree species were surveyed and increment of richness by natural establishment was quantified. Syndromes of propagule dispersion and regeneration guilds were determined. A total of 918 individuals from 73 species were found; 48 (65.8%) of them were species naturally established in the area. 71.2% of the species were classified as zoochoric (71.2%), and 54.8% as light demanding for climax. After six years, the restoration process was characterized by a trend of richness increment and replacement of initial by late successional species, indicating the relevance of the natural regeneration mechanism.
DOI: 10.6084/m9.figshare.7512695
title: Evaluation of Forest Restoration in a Degraded Permanent Preservation Area in Santa Catarina State, Brazil

description: This study evaluated the process of restoration in a degraded Permanent Preservation Area (PPA) in the municipality of Pouso Redondo, Santa Catarina state, six years after the initial plantation of trees and isolation of the area. Tree species were surveyed and increment of richness by natural establishment was quantified. Syndromes of propagule dispersion and regeneration guilds were determined. A total of 918 individuals from 73 species were found; 48 (65.8%) of them were species naturally established in the area. 71.2% of the species were classified as zoochoric (71.2%), and 54.8% as light demanding for climax. After six years, the restoration process was characterized by a trend of richness increment and replacement of initial by late successional species, indicating the relevance of the natural regeneration mechanism.
DOI: 10.6084/m9.figshare.7509971
title: Quality Function Deployment (QFD) in the Evaluation of Charcoal Quality Used for Food Cooking

description: Charcoal is widely used for cooking (barbecue) in Brazilian homes. However, its marketing is done without previous survey of the real needs of consumers of this input. The Quality Function Deployment (QFD) is a method suggested for achieving quality by identifying the desires and demands of consumers. The present study aimed to evaluate the applicability of this method in the quality surveying of charcoal for cooking commercialized in the municipality of Piracicaba, Sao Paulo state. The results show that the characteristics related to the packaging of charcoal are among the most important features of the product presentation. From the point of view of the consumer, the QFD methodology was a useful tool for defining the best quality charcoal used for cooking food.
DOI: 10.6084/m9.figshare.7509971.v1
title: Quality Function Deployment (QFD) in the Evaluation of Charcoal Quality Used for Food Cooking

description: Charcoal is widely used for cooking (barbecue) in Brazilian homes. However, its marketing is done without previous survey of the real needs of consumers of this input. The Quality Function Deployment (QFD) is a method suggested for achieving quality by identifying the desires and demands of consumers. The present study aimed to evaluate the applicability of this method in the quality surveying of charcoal for cooking commercialized in the municipality of Piracicaba, Sao Paulo state. The results show that the characteristics related to the packaging of charcoal are among the most important features of the product presentation. From the point of view of the consumer, the QFD methodology was a useful tool for defining the best quality charcoal used for cooking food.
DOI: 10.6084/m9.figshare.7512149
title: Determination of the Effective Dispersal Distance of Cabralea canjerana

description: This study aimed to know the effective dispersal distance of Cabralea canjerana (Vell.) Mart. in a forest fragment. Plots of 5 × 5 m were allocated in an area with high density of regenerating individuals of the species. Individuals higher than 30 cm and with diameter at breast height (DBH) smaller than 15 cm were recorded and referenced in pseudo-coordinates. Individuals with DBH greater than 15 cm were considered as seed producers. The dispersal distance was calculated using the methodology by Nathan & Muller-Landau (2000); two distances were calculated: the distance of each individual in relation to the nearest adult tree, and the average distance between all matrix trees. The effective dispersal peak occurs at a mean distance of 30 meters from the mother trees. Three seed producing individuals per hectare are needed to ensure the continuous regeneration of the species.
DOI: 10.6084/m9.figshare.7512149.v1
title: Determination of the Effective Dispersal Distance of Cabralea canjerana

description: This study aimed to know the effective dispersal distance of Cabralea canjerana (Vell.) Mart. in a forest fragment. Plots of 5 × 5 m were allocated in an area with high density of regenerating individuals of the species. Individuals higher than 30 cm and with diameter at breast height (DBH) smaller than 15 cm were recorded and referenced in pseudo-coordinates. Individuals with DBH greater than 15 cm were considered as seed producers. The dispersal distance was calculated using the methodology by Nathan & Muller-Landau (2000); two distances were calculated: the distance of each individual in relation to the nearest adult tree, and the average distance between all matrix trees. The effective dispersal peak occurs at a mean distance of 30 meters from the mother trees. Three seed producing individuals per hectare are needed to ensure the continuous regeneration of the species.
DOI: 10.6084/m9.figshare.7516847
title: Natural Resistance of Four Forest Species Submitted to Test with Decay Fungi

description: This study aimed to evaluate the natural durability of Eucalyptus dunnii, Eucalyptus robusta, Eucalyptus tereticornis and Hovenia dulcis woods subjected to accelerated testing in laboratory with rotting fungi Gloeophyllum trabeum, causer of brown rot; and Trametes versicolor, causer of white rot. The samples remained 12 weeks in contact with the fungi, after that, we calculated the percentages of mass loss, classified according to the degree of natural resistance and assessed according to the rate of susceptibility to attack. The averages of the results were compared by the Tukey test at 5% significance level. Eucalyptus robusta wood was classified as resistant and Hovenia dulcis wood was classified as non-resistant to both fungi. The index of susceptibility to attack indicated that the species studied present acceptable values and that they are more resistant to the attack of fungi compared with reference species (Pinus sp.; Cecropia sp.)
DOI: 10.6084/m9.figshare.7516847.v1
title: Natural Resistance of Four Forest Species Submitted to Test with Decay Fungi

description: This study aimed to evaluate the natural durability of Eucalyptus dunnii, Eucalyptus robusta, Eucalyptus tereticornis and Hovenia dulcis woods subjected to accelerated testing in laboratory with rotting fungi Gloeophyllum trabeum, causer of brown rot; and Trametes versicolor, causer of white rot. The samples remained 12 weeks in contact with the fungi, after that, we calculated the percentages of mass loss, classified according to the degree of natural resistance and assessed according to the rate of susceptibility to attack. The averages of the results were compared by the Tukey test at 5% significance level. Eucalyptus robusta wood was classified as resistant and Hovenia dulcis wood was classified as non-resistant to both fungi. The index of susceptibility to attack indicated that the species studied present acceptable values and that they are more resistant to the attack of fungi compared with reference species (Pinus sp.; Cecropia sp.)
DOI: 10.6084/m9.figshare.7506275
title: Floristics and Phytosociology in Areas of Dense Woodland and Mesophytic Forest in the Pirapitinga Ecological Station, Minas Gerais State, Brazil

description: ABSTRACTThe objective of this study was to evaluate the floristic and phytosociological parameters of the species present in areas of mesophytic forest and dense woodland in the Pirapitinga Ecological Station, Minas Gerais state, Brazil. For the survey of floristic and phytosociological parameters, a total of 108 plots of 100 m2 were implanted, where all individuals with circumference at ground height (CGH) ≥ 16 cm were sampled in areas of dense woodland and mesophytic forest. The following parameters were calculated: frequency, density, dominance, values of importance and cover, Shannon and evenness indices, and floristic similarity by the Sorensen index. In both study areas, a total of 1,716 individuals of 67 species, 60 genera, and 35 families were sampled. The richest families were Vochysiaceae and Fabaceae. The dense woodland area presented the highest species richness (67) and the highest density, while the mesophytic forest area presented the greatest species development.
DOI: 10.6084/m9.figshare.7506275.v1
title: Floristics and Phytosociology in Areas of Dense Woodland and Mesophytic Forest in the Pirapitinga Ecological Station, Minas Gerais State, Brazil

description: ABSTRACTThe objective of this study was to evaluate the floristic and phytosociological parameters of the species present in areas of mesophytic forest and dense woodland in the Pirapitinga Ecological Station, Minas Gerais state, Brazil. For the survey of floristic and phytosociological parameters, a total of 108 plots of 100 m2 were implanted, where all individuals with circumference at ground height (CGH) ≥ 16 cm were sampled in areas of dense woodland and mesophytic forest. The following parameters were calculated: frequency, density, dominance, values of importance and cover, Shannon and evenness indices, and floristic similarity by the Sorensen index. In both study areas, a total of 1,716 individuals of 67 species, 60 genera, and 35 families were sampled. The richest families were Vochysiaceae and Fabaceae. The dense woodland area presented the highest species richness (67) and the highest density, while the mesophytic forest area presented the greatest species development.
DOI: 10.6084/m9.figshare.7510682.v1
title: Economic Profitability of Land Lease for Eucalyptus Cultivation in Sao Paulo State, Brazil

description: ABSTRACTThe present study aimed to analyze the leasing of land for the cultivation of eucalyptus in Vale do Paraiba, Sao Paulo state, Brazil. We used information from 10 properties, eight landowners, a pulp and paper company, and an investor in forestry assets. The economic tools used were the Net Present Value (NPV), Internal Rate of Return (IRR) and Land Expectation Value (LEV). Considering a minimum attractiveness rate of 8.75%, the cultivation of eucalyptus with investment in land in the study area was economically viable for only five of the properties analyzed. With the guarantee of productivity established in the contract, the investment was feasible for land lease, but uneconomical for the investor. Ensuring productivity was important to maintain economic viability for the investor and the lessee, considering that without productivity assurance only three properties showed economic viability for land lease.