cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14283375.v1
title: REPRODUCTIVE PHENOLOGICAL STRATEGIES OF Xylopia aromatica (LAM.) MART. (ANNONACEAE) IN CERRADO AREA

description: ABSTRACT Despite efforts in recent years, data on the phenology of Cerrado species are fragmentary, and even X. aromatica being widely distributed, its phenology is unknown. In this sense, we sought to evaluate their reproductive phenology in a fragment of Cerrado in Rio Verde Municipality and correlate it with climatic variables. 20 individuals were marked to be subject to monthly phenological phases observation: bud, open flower, immature and mature fruit. For the analysis we used the percentage of Fournier, method of presence/absence and Spearman correlation. The emission of buds occurred irregularly and was present in both the wet and in the dry period, not correlating with any of the climatic variables. Flowering occurred distributed throughout the study, negatively correlated only with relative humidity. Fruitification occurred in the dry season and in the transition from dry to rainy season, negatively correlated with rainfall and humidity. The fruits matured in the last months of the dry season and first months of the rainy season, correlating only with moisture. The reproductive cycle of X. aromatica is not strongly influenced by climatic variables and the fact that it is negatively correlated with precipitation and humidity suggests that the species was adapted to optimize pollination and dispersal of fruit.
DOI: 10.6084/m9.figshare.14283372
title: STRUCTURE AND POTENTIAL USE OF TREE SPECIES IN A MANAGED FOREST IN PA MOJU, SANTÁREM-PARÁ

description: The study aimed to analyze the phytosociology and multipurpose tree species use in a managed forest in the Actaaia community, Settlement Moju I and II, Santarém, Pará. 10 ha of managed forest were sampled, systematically allocating 20 plots of 20 m x 250 m, with all trees with DBH ≥ 10 cm measured. 128 species belonging to 37 families were found. The Shannon diversity index was 4.04, which resulted in 83% of the maximum diversity of the sample. Each species was represented on average by eight individuals and the density and basal area were 341.83 trees.ha-1 and 18.05 m².ha-1, respectively. After exploration, the forest contained species with timber and non-timber potential use by the community, with the occurrence of 58% of species with at least two uses, revealing the importance of studying their features to improve the quality of life of the community, which should be considered in a community forest management plan.
DOI: 10.6084/m9.figshare.14283374.v1
title: THE THEORY OF REAL OPTIONS IN INVESTMENT ANALYSIS OF AGROFORESTRY SYSTEMS

description: ABSTRACT In this study we compared the values generated by traditional economic analysis (Net Present Value - NPV) with Real Options Method. The objective was to apply the method proposed by Copeland & Antikarov for rainbow options, due to three stochastic variables selected with decision of abandonment if the project value with flexibility was less than the value of the underlying stock. It enabled the flexibility value generation in order to entrepreneurs to have more confidence in their decision when they are investing in a project with Agroforestry System, with different scenarios visualization in a single analysis. The results evidenced that the economic viability analysis, using Real Options, provided the best view of the possible scenarios, within a range generated by the prices volatility. The Net Present Value adopted as the underlying stock value was R$ 5,684.32, using the discount rate (WACC) of 9.95% and risk-free interest rate of 7.5%. To determine the volatility were calculated: the logarithmic return standard deviation (27.06), the average (0.0883), upward movements values (u) (1.3107) with 61.34% of probability and downward movements values (d)(0.7628) with 38.66% of probability. The option value in case of abandonment was R$ 2,059.01/ha positive. The results showed that the NPV overestimated the project return and that it would be viable to abandon it.
DOI: 10.6084/m9.figshare.14283378
title: DIOECY EFFECT ON GROWTH OF PLANTED Araucaria angustifolia Bert. O. Kuntze TREES

description: ABSTRACT The aim of the study was to evaluate the influence of dioecy on the growth in diameter at breast height (DBH), individual basal area, total height and individual volume of planted Araucaria angustifolia trees. The data came from 60 trees (30 male trees and 30 female trees) sampled from a 30-year-old plantation in Paraná State. Complete stem analysis was used to recover historical tree growth. The Chapman-Richards model was fitted in order to represent the growth and yield of the dendrometric variables for female and male Araucaria trees. Weighted non-linear least squared method was used in the fitting process and the inverse variance was used as weight to solve the problem of heteroscedasticity. The test to verify the equality of parameters and the identity of non-linear regression models proposed by Regazzi (2003) was used to test the influence of dioecy on growth. Dioecy significantly influenced the growth of Araucaria, and female trees have higher growth in diameter, individual basal area and individual volume, while male trees showed better height development. The asymptotic coefficient of the Chapman-Richards model showed that male trees have a higher asymptotic height than female trees.
DOI: 10.6084/m9.figshare.14283381
title: EFFECT OF PLANT EXTRACTS AND GROWTH SUBSTRATES ON CONTROLLING DAMPING-OFF IN PINUS TECUNUMANII SEEDLINGS

description: ABSTRACT Damping-off is considered one of the most limiting phytosanitary problems in conifer seedling production because it may cause massive damage or total plant death in short time periods. This pathology is caused by a complex of microorganisms, the most common of which are Fusarium spp. and Rhizoctonia spp. This study evaluated the effect of growth substrates and plant extracts at different concentrations on germination and incidence of disease in Pinus tecunumanii plants. The plants were inoculated with the damping-off pathogen Fusarium oxysporum and treatments were applied in a completely randomized design with a factorial arrangement of 4x2x3. This corresponded to four substrates (pine bark, rice hull, coconut husk and sandy soil (4:1)); two plant extracts (Matricaria chamomilla and Datura stramonium), and three concentrations of each extract (Control concentration: 0%, Concentration 1: 50 % and Concentration 2: Undiluted). Each treatment had three repetitions, with 25 plants per repetition. The growth substrates affected germination; the most effective of these were sandy soil (4:1) and pine bark, with 90% and 92% germination at day 20, respectively. No significant difference was observed between the germination obtained with these substrates and that obtained with coconut husk after day 19. Meanwhile, all of the extracts had a significant effect on controlling the disease when they were combined with the substrates, with the exception of coconut husk. With this last substrate the incidence of disease was lower than 4% without the application of plant extracts; this indicates that coconut husk discourages the development of the disease on its own.
DOI: 10.22008/fk2/oiajvo/2bqjl1
title: al.tif

description: SICE version: Cloud removed, PPGC, SNAP7, pySICEv1.4
DOI: 10.6084/m9.figshare.14283378.v1
title: DIOECY EFFECT ON GROWTH OF PLANTED Araucaria angustifolia Bert. O. Kuntze TREES

description: ABSTRACT The aim of the study was to evaluate the influence of dioecy on the growth in diameter at breast height (DBH), individual basal area, total height and individual volume of planted Araucaria angustifolia trees. The data came from 60 trees (30 male trees and 30 female trees) sampled from a 30-year-old plantation in Paraná State. Complete stem analysis was used to recover historical tree growth. The Chapman-Richards model was fitted in order to represent the growth and yield of the dendrometric variables for female and male Araucaria trees. Weighted non-linear least squared method was used in the fitting process and the inverse variance was used as weight to solve the problem of heteroscedasticity. The test to verify the equality of parameters and the identity of non-linear regression models proposed by Regazzi (2003) was used to test the influence of dioecy on growth. Dioecy significantly influenced the growth of Araucaria, and female trees have higher growth in diameter, individual basal area and individual volume, while male trees showed better height development. The asymptotic coefficient of the Chapman-Richards model showed that male trees have a higher asymptotic height than female trees.
DOI: 10.6084/m9.figshare.14283381.v1
title: EFFECT OF PLANT EXTRACTS AND GROWTH SUBSTRATES ON CONTROLLING DAMPING-OFF IN PINUS TECUNUMANII SEEDLINGS

description: ABSTRACT Damping-off is considered one of the most limiting phytosanitary problems in conifer seedling production because it may cause massive damage or total plant death in short time periods. This pathology is caused by a complex of microorganisms, the most common of which are Fusarium spp. and Rhizoctonia spp. This study evaluated the effect of growth substrates and plant extracts at different concentrations on germination and incidence of disease in Pinus tecunumanii plants. The plants were inoculated with the damping-off pathogen Fusarium oxysporum and treatments were applied in a completely randomized design with a factorial arrangement of 4x2x3. This corresponded to four substrates (pine bark, rice hull, coconut husk and sandy soil (4:1)); two plant extracts (Matricaria chamomilla and Datura stramonium), and three concentrations of each extract (Control concentration: 0%, Concentration 1: 50 % and Concentration 2: Undiluted). Each treatment had three repetitions, with 25 plants per repetition. The growth substrates affected germination; the most effective of these were sandy soil (4:1) and pine bark, with 90% and 92% germination at day 20, respectively. No significant difference was observed between the germination obtained with these substrates and that obtained with coconut husk after day 19. Meanwhile, all of the extracts had a significant effect on controlling the disease when they were combined with the substrates, with the exception of coconut husk. With this last substrate the incidence of disease was lower than 4% without the application of plant extracts; this indicates that coconut husk discourages the development of the disease on its own.
DOI: 10.6084/m9.figshare.14283383
title: GENETIC GAIN FROM DIFFERENT SELECTION METHODS IN Eucalyptus macarthurii PROGENIES IN DIFFERENT ENVIRONMENTS

description: ABSTRACT The aims of this research was to estimate genetic parameters of Eucalyptus macarthurii progenies and to predict genetic gain for different selection methods. In order to evaluate the gains, eleven progenies tests were studied. These tests were installed in 1997, in randomized blocks design, in two sites, with 5 replicates of five plants per plot. The progenies were evaluated, from the first to the eighth year, regarding the variable diameter at breast height (DBH). The genetic parameters were estimated using the mixed model procedure (REML/BLUP). The selection of the progenies for establishing a Clonal Seed Orchard was based on the analysis by location, joint analysis and on the harmonic mean of the relative performance of genotypic values (HMRPGV) with different selection intensities among and within families: three, four, five and six individuals per progeny with the selection of the top 30 individuals, taking into consideration the effective population size (N e ). The best age to carry out the selection was seven years old, however, early selection can be made from age two onwards. Each environment characteristics influenced progenies phenotypic expression, so the higher gains in balance with N e , were estimated with the selection of individuals for each site, and the selection of five or six individuals per progeny.
DOI: 10.6084/m9.figshare.14283383.v1
title: GENETIC GAIN FROM DIFFERENT SELECTION METHODS IN Eucalyptus macarthurii PROGENIES IN DIFFERENT ENVIRONMENTS

description: ABSTRACT The aims of this research was to estimate genetic parameters of Eucalyptus macarthurii progenies and to predict genetic gain for different selection methods. In order to evaluate the gains, eleven progenies tests were studied. These tests were installed in 1997, in randomized blocks design, in two sites, with 5 replicates of five plants per plot. The progenies were evaluated, from the first to the eighth year, regarding the variable diameter at breast height (DBH). The genetic parameters were estimated using the mixed model procedure (REML/BLUP). The selection of the progenies for establishing a Clonal Seed Orchard was based on the analysis by location, joint analysis and on the harmonic mean of the relative performance of genotypic values (HMRPGV) with different selection intensities among and within families: three, four, five and six individuals per progeny with the selection of the top 30 individuals, taking into consideration the effective population size (N e ). The best age to carry out the selection was seven years old, however, early selection can be made from age two onwards. Each environment characteristics influenced progenies phenotypic expression, so the higher gains in balance with N e , were estimated with the selection of individuals for each site, and the selection of five or six individuals per progeny.
DOI: 10.6084/m9.figshare.14283380
title: ESTIMATE OF THE HYPSOMETRIC RELATIONSHIP WITH NONLINEAR MODELS FITTED BY EMPIRICAL BAYESIAN METHODS

description: ABSTRACT In this paper we propose a Bayesian approach to solve the inference problem with restriction on parameters, regarding to nonlinear models used to represent the hypsometric relationship in clones of Eucalyptus sp. The Bayesian estimates are calculated using Monte Carlo Markov Chain (MCMC) method. The proposed method was applied to different groups of actual data from which two were selected to show the results. These results were compared to the results achieved by the minimum square method, highlighting the superiority of the Bayesian approach, since this approach always generate the biologically consistent results for hipsometric relationship.
DOI: 10.6084/m9.figshare.14283380.v1
title: ESTIMATE OF THE HYPSOMETRIC RELATIONSHIP WITH NONLINEAR MODELS FITTED BY EMPIRICAL BAYESIAN METHODS

description: ABSTRACT In this paper we propose a Bayesian approach to solve the inference problem with restriction on parameters, regarding to nonlinear models used to represent the hypsometric relationship in clones of Eucalyptus sp. The Bayesian estimates are calculated using Monte Carlo Markov Chain (MCMC) method. The proposed method was applied to different groups of actual data from which two were selected to show the results. These results were compared to the results achieved by the minimum square method, highlighting the superiority of the Bayesian approach, since this approach always generate the biologically consistent results for hipsometric relationship.
DOI: 10.6084/m9.figshare.14283386
title: EUCALYPTUS CELLULOSE MICRO/NANOFIBRILS IN EXTRUDED FIBER-CEMENT COMPOSITES

description: ABSTRACT Extrusion is an alternative process for fiber-cement production and allows many advantages such as different geometries for the extruded products and the low initial investment for industrial production. In this context the aim of this study was to produce cellulose micro/nanofibrils from Eucalyptus pulp and evaluate the properties of cementitious composites made with different contents of cellulose micro/nanofibrils. Cellulose micro/ nanofibrils were produced using a mechanical defibrillator, and characterized for their morphology. Extruded composites were produced with 0.5 to 1.0% (by mass) of micro/ nanofibrils and compared to unreinforced composites. Composites reinforced with 1.0% of micro/nanofibrils presented higher water absorption and apparent porosity than their counter parts. No significant differences were observed for modulus of rupture (MOR), limit of proportionality (LOP) and final specific deformation, between the composites reinforced with 0.5% and 1.0% of micro/nanofibrils and those with no reinforcement. The static elastic modulus (MOE) increased and specific energy decreased with the inclusion of 1.0% of micro/nanofibrils. Dynamic elastic modulus (E) of the composites increased with the increase of micro/nanofibrils content and of weathering exposition. This study indicates that fiber-cements are sensitive to changes in structural composition and time of ageing (135 days). This information can be useful for developing of new products based on cellulose micro/nanofibrils.
DOI: 10.6084/m9.figshare.14283387
title: BIOMASS AND MICROBIAL ACTIVITY UNDER DIFFERENT FOREST COVERS

description: ABSTRACT This study evaluated the soil fertility, biomass and microbial activity of the soil under forest cover of Eucalyptus grandis, Eucalyptus pilularis, Eucalyptus cloeziana and Corymbia maculata; Pinus Caribbean var. hondurensis, 40 years old, and a fragment of Semideciduous Forest, located on the campus of the Federal University of Lavras. In soil samples collected in the 0-5 cm layer were determined fertility parameters, basal respiration and microbial biomass carbon. The results showed that for the species E. grandis and E. cloeziana the carbon of biomass microbial content was higher than for any other ecosystem evaluated, and equal to those observed under native forest. In contrast, the ground under Pinus had the lowest microbiological indexes. Under C. maculata and E. pilularis the contents were intermediate for this parameter. The basal respiration of all ecosystems was equal. The fertility level was very low in all types of evaluated vegetation.
DOI: 10.6084/m9.figshare.14283387.v1
title: BIOMASS AND MICROBIAL ACTIVITY UNDER DIFFERENT FOREST COVERS

description: ABSTRACT This study evaluated the soil fertility, biomass and microbial activity of the soil under forest cover of Eucalyptus grandis, Eucalyptus pilularis, Eucalyptus cloeziana and Corymbia maculata; Pinus Caribbean var. hondurensis, 40 years old, and a fragment of Semideciduous Forest, located on the campus of the Federal University of Lavras. In soil samples collected in the 0-5 cm layer were determined fertility parameters, basal respiration and microbial biomass carbon. The results showed that for the species E. grandis and E. cloeziana the carbon of biomass microbial content was higher than for any other ecosystem evaluated, and equal to those observed under native forest. In contrast, the ground under Pinus had the lowest microbiological indexes. Under C. maculata and E. pilularis the contents were intermediate for this parameter. The basal respiration of all ecosystems was equal. The fertility level was very low in all types of evaluated vegetation.
DOI: 10.6084/m9.figshare.14283386.v1
title: EUCALYPTUS CELLULOSE MICRO/NANOFIBRILS IN EXTRUDED FIBER-CEMENT COMPOSITES

description: ABSTRACT Extrusion is an alternative process for fiber-cement production and allows many advantages such as different geometries for the extruded products and the low initial investment for industrial production. In this context the aim of this study was to produce cellulose micro/nanofibrils from Eucalyptus pulp and evaluate the properties of cementitious composites made with different contents of cellulose micro/nanofibrils. Cellulose micro/ nanofibrils were produced using a mechanical defibrillator, and characterized for their morphology. Extruded composites were produced with 0.5 to 1.0% (by mass) of micro/ nanofibrils and compared to unreinforced composites. Composites reinforced with 1.0% of micro/nanofibrils presented higher water absorption and apparent porosity than their counter parts. No significant differences were observed for modulus of rupture (MOR), limit of proportionality (LOP) and final specific deformation, between the composites reinforced with 0.5% and 1.0% of micro/nanofibrils and those with no reinforcement. The static elastic modulus (MOE) increased and specific energy decreased with the inclusion of 1.0% of micro/nanofibrils. Dynamic elastic modulus (E) of the composites increased with the increase of micro/nanofibrils content and of weathering exposition. This study indicates that fiber-cements are sensitive to changes in structural composition and time of ageing (135 days). This information can be useful for developing of new products based on cellulose micro/nanofibrils.
DOI: 10.6084/m9.figshare.14283390
title: SCREW AND NAIL HOLDING PROPERTIES OF PLYWOOD PANELS REINFORCED WITH GLASS FIBER FABRIC

description: ABSTRACT In this study, plywood and reinforced plywood with glass fiber fabric were produced with rotary peeled poplar veneers using phenol formaldehyde adhesive. Screw and nail holding tests were conducted to obtain the characteristics of the plywood and reinforced plywood boards. One control group and three different test groups were used. The effects of glass fiber fabric on the screw direct withdrawal, screw-head pull-through, and lateral nail resistance were determined. The results of the tests indicated that the reinforced plywood’s resistances to direct withdrawal of the screw, screw-head pull-through, and lateral nail resistance were significantly higher than those of the unreinforced plywood. In addition, reinforcement of the plywood boards provided longer displacement at maximum load.
DOI: 10.22008/fk2/oiajvo/8opxiy
title: albedo_bb_planar_sw.tif

description: SICE version: Cloud removed, PPGC, SNAP7, pySICEv1.4
DOI: 10.6084/m9.figshare.14283390.v1
title: SCREW AND NAIL HOLDING PROPERTIES OF PLYWOOD PANELS REINFORCED WITH GLASS FIBER FABRIC

description: ABSTRACT In this study, plywood and reinforced plywood with glass fiber fabric were produced with rotary peeled poplar veneers using phenol formaldehyde adhesive. Screw and nail holding tests were conducted to obtain the characteristics of the plywood and reinforced plywood boards. One control group and three different test groups were used. The effects of glass fiber fabric on the screw direct withdrawal, screw-head pull-through, and lateral nail resistance were determined. The results of the tests indicated that the reinforced plywood’s resistances to direct withdrawal of the screw, screw-head pull-through, and lateral nail resistance were significantly higher than those of the unreinforced plywood. In addition, reinforcement of the plywood boards provided longer displacement at maximum load.
DOI: 10.6084/m9.figshare.14283392
title: DIAMETRIC SITE INDEX: AN ALTERNATIVE METHOD TO ESTIMATE SITE QUALITY IN Nothofagus obliqua AND N. alpina FORESTS

description: ABSTRAT The first step for constructing models of tree growth and yield is site quality assessment. To estimate this attribute, several methodologies are available in which site index (SI) is a standard one. However, this approach, that uses height at a reference age of trees, can be simplified if age is replaced by another reference variable easier to measure. In this case, the diametric site index (DSI) represents the mean height of dominant trees at a reference mean diameter at breast height. The aim of this work was to develop DSI in pure and mixed Nothofagus alpina and N. obliqua forests, and compare these models with the classical proposals based on height-age variables, within the temperate forest of northwestern Patagonia from Argentina, South America. Data originated from temporary plots and stem analyses were used. Tree age and diameter at breast height were obtained from each plot and used for establishing DSI family functions, following the guide-curve methodology. Site classes were proportionally represented among DSI curves of 17.0, 21.5, 26.0, 30.5 and 35.0 m of dominant tree height. Reference diameter instead of reference age can be cautiously used in order to fit site index models.