Pub Date : 2021-01-01DOI: 10.1590/2179-8087-floram-2019-0023
D. Souza, L. S. Ferrari, Vinicius Morais Coutinho, J. Santos, Sylvio Péllico Netto, C. Sanquetta, A. P. D. Corte
We investigated the spatial distribution of population data and diameter classes and modeled the diameter structure of Vouacapoua americana Aubl. (Acapu) trees in a community forest management area. A forest census of trees with diameters ≥ 33 cm was carried out in the 2015 Annual Production Unit (APU-2015). Ripley’s univariate K function and the global Moran’s index were used to describe spatial autocorrelation. Three harvest intensities (50, 70, and 80%) were simulated for the potential trees. The Weibull (3P) function provided the best performance to describe the diameter distribution of the original tree population, as well as in the harvested 50 and 70% intensities. In general, the spatial pattern of V. americana was aggregated. However, other natural factors, as population size, dynamics, geographic distribution, should be used as indicators for forest management and conservation of the specie.
{"title":"Diameter Structure, Spatial Pattern, and Management Scenarios of Acapu Trees: A Case Study","authors":"D. Souza, L. S. Ferrari, Vinicius Morais Coutinho, J. Santos, Sylvio Péllico Netto, C. Sanquetta, A. P. D. Corte","doi":"10.1590/2179-8087-floram-2019-0023","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2019-0023","url":null,"abstract":"We investigated the spatial distribution of population data and diameter classes and modeled the diameter structure of Vouacapoua americana Aubl. (Acapu) trees in a community forest management area. A forest census of trees with diameters ≥ 33 cm was carried out in the 2015 Annual Production Unit (APU-2015). Ripley’s univariate K function and the global Moran’s index were used to describe spatial autocorrelation. Three harvest intensities (50, 70, and 80%) were simulated for the potential trees. The Weibull (3P) function provided the best performance to describe the diameter distribution of the original tree population, as well as in the harvested 50 and 70% intensities. In general, the spatial pattern of V. americana was aggregated. However, other natural factors, as population size, dynamics, geographic distribution, should be used as indicators for forest management and conservation of the specie.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"5 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84582898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-FLORAM-2020-0070
Ewerton Danilo Souza Santos, H. Pinheiro, Humberto Gallo Junior
Natural events associated to environmental disasters has increased with climate changes. Understanding the watershed behavior allows the managers to execute an efficient land use planning. By using as a study area the municipality of São Luiz do Paraitinga, the study’s goal was apply the Height Above the Nearest Drainage Model, which allows categorizing areas based on simulations of water level variations, to evaluate flooding risks at the municipality. The data were processed using ArcGIS Desktop v. 10.3, System for Automated Geoscientific Analysis and TerraHidro. The flood susceptibility map was generated with spatial resolution of 30 m. It was simulated water level variations of 7, 9, 12 and 15 meters and, according to the model, areas with high or very high flood susceptibility cover approximately 13% of the study area (81 km2). In general, the methods used afforded coherent results given the resolution of source data and available information.
与环境灾害相关的自然事件随着气候变化而增加。了解流域行为可以使管理者执行有效的土地利用规划。通过使用 o Luiz do Paraitinga市作为研究区域，研究的目标是应用最近排水模型的高度，该模型允许基于水位变化的模拟对区域进行分类，以评估市政当局的洪水风险。数据处理使用ArcGIS Desktop v. 10.3, System for Automated Geoscientific Analysis和TerraHidro。生成空间分辨率为30 m的洪水敏感性图。该模型模拟了7、9、12和15米的水位变化，根据该模型，高或极高洪水易感性区域约占研究面积(81平方公里)的13%。一般来说，在给定源数据和可用信息的分辨率的情况下，所使用的方法提供了一致的结果。
{"title":"Height Above the Nearest Drainage to Predict Flooding Areas in São Luiz do Paraitinga, São Paulo","authors":"Ewerton Danilo Souza Santos, H. Pinheiro, Humberto Gallo Junior","doi":"10.1590/2179-8087-FLORAM-2020-0070","DOIUrl":"https://doi.org/10.1590/2179-8087-FLORAM-2020-0070","url":null,"abstract":"Natural events associated to environmental disasters has increased with climate changes. Understanding the watershed behavior allows the managers to execute an efficient land use planning. By using as a study area the municipality of São Luiz do Paraitinga, the study’s goal was apply the Height Above the Nearest Drainage Model, which allows categorizing areas based on simulations of water level variations, to evaluate flooding risks at the municipality. The data were processed using ArcGIS Desktop v. 10.3, System for Automated Geoscientific Analysis and TerraHidro. The flood susceptibility map was generated with spatial resolution of 30 m. It was simulated water level variations of 7, 9, 12 and 15 meters and, according to the model, areas with high or very high flood susceptibility cover approximately 13% of the study area (81 km2). In general, the methods used afforded coherent results given the resolution of source data and available information.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"6 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84759696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-floram-2020-0071
R. Felix, F. Pereira, M. Bevilacqua, Daniel Basílio Zandonadi, R. Bozelli, M. P. Figueiredo‐Barros
The use of native species’ stem cuttings in riparian forests disturbed by silting could be a promising low-tech alternative for restoration practitioners in riverscape rehabilitation. In this study, we evaluated the vegetative propagation of Amazonian native plants (Buchenavia parviflora, Euterpe oleracea, Ficus insipida and Socratea exorrhiza) with the addition of a bio-fertilizer, and humic and fulvic acids in soil disturbed by human-induced silting. We found that F. insipida and B. parviflora were able to grow and showed high survival percentage with the development of leaves, buds, and roots; even in nutrient deficient and clayey soils. We also found that the frequency of application and the concentration of the organic additives did not show significant influence on plants’ development. Thus, advance in situ tests with both species could be an interesting step to contribute to riverine ecosystems restoration practices.
{"title":"Vegetative Propagation of Amazonian Indigenous Species for Restoration Practices Over a Riverscape Floodplain Disturbed by Silting","authors":"R. Felix, F. Pereira, M. Bevilacqua, Daniel Basílio Zandonadi, R. Bozelli, M. P. Figueiredo‐Barros","doi":"10.1590/2179-8087-floram-2020-0071","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2020-0071","url":null,"abstract":"The use of native species’ stem cuttings in riparian forests disturbed by silting could be a promising low-tech alternative for restoration practitioners in riverscape rehabilitation. In this study, we evaluated the vegetative propagation of Amazonian native plants (Buchenavia parviflora, Euterpe oleracea, Ficus insipida and Socratea exorrhiza) with the addition of a bio-fertilizer, and humic and fulvic acids in soil disturbed by human-induced silting. We found that F. insipida and B. parviflora were able to grow and showed high survival percentage with the development of leaves, buds, and roots; even in nutrient deficient and clayey soils. We also found that the frequency of application and the concentration of the organic additives did not show significant influence on plants’ development. Thus, advance in situ tests with both species could be an interesting step to contribute to riverine ecosystems restoration practices.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"60 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80890058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-FLORAM-2020-0082
E. Viveiros, B. S. Francisco, A. López, F. Piña-Rodrigues, J. M. S. Silva
Tree plantation is the most used technique for ecological restoration, although passive restoration requires a lower investment of resources. This research aimed to compare the composition and structure of the community of regenerant plants in areas under restoration through Assisted Natural Regeneration and mixed native Tree Planting, in the same area. We randomly placed 12 plots of 100 m2 each and sampled all the regenerating individuals found within them. We compared both restoration methods regarding growth pattern, dispersal syndromes, and successional groups. In both methodologies, trees and shrubs were the most abundant growth forms. The pioneer successional class was the most abundant in number of individuals for both treatments. We concluded that the two restoration methods allowed the regeneration of native species. We propose that Assisted Natural Regeneration is a viable restoration strategy, capable of boosting the initial processes of the community, especially in a matrix surrounded by remaining forests.
{"title":"Drivers of Restoration Trajectory of a Community of Regenerant Plants: Natural Regeneration or Tree Seedling?","authors":"E. Viveiros, B. S. Francisco, A. López, F. Piña-Rodrigues, J. M. S. Silva","doi":"10.1590/2179-8087-FLORAM-2020-0082","DOIUrl":"https://doi.org/10.1590/2179-8087-FLORAM-2020-0082","url":null,"abstract":"Tree plantation is the most used technique for ecological restoration, although passive restoration requires a lower investment of resources. This research aimed to compare the composition and structure of the community of regenerant plants in areas under restoration through Assisted Natural Regeneration and mixed native Tree Planting, in the same area. We randomly placed 12 plots of 100 m2 each and sampled all the regenerating individuals found within them. We compared both restoration methods regarding growth pattern, dispersal syndromes, and successional groups. In both methodologies, trees and shrubs were the most abundant growth forms. The pioneer successional class was the most abundant in number of individuals for both treatments. We concluded that the two restoration methods allowed the regeneration of native species. We propose that Assisted Natural Regeneration is a viable restoration strategy, capable of boosting the initial processes of the community, especially in a matrix surrounded by remaining forests.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"32 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83261448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-FLORAM-2019-0077
N. Salomão, G. Fernandes, R. Pereira, D. Mucida, L. Silva, A. P. D. Gonzaga, E. Machado
Fragmentation of natural areas alters the natural landscape, removing native vegetation and creating an anthropic matrix. In order to better understand the consequences of grazing in areas of campo rupestre and forest, the present study aimed to analyze changes in the vegetation of Cerrado and Atlantic Forest, in the Southern Espinhaço, between 1979 and 2015. The vegetation of the study area was identified as arboreal (forest), or herbaceous or shrubby (campo rupestre) by visual classification of a mosaic of aerial photographs from 1979 and the supervised classification of land use from a Landsat 8 image from 2015. Differences in vegetation were analyzed using a transition matrix based on the “Markov model”, which indicated conversions of vegetation classes due to the misuse of land, mainly as pasture. The results indicate the conversion of arboreal vegetation area into areas of exotic herbaceous vegetation, and stability in the area of shrubby vegetation.
{"title":"The Homogenization of two Different Natural Ecosystems by Conversion to Pasture in the Southern Espinhaço, Brazil","authors":"N. Salomão, G. Fernandes, R. Pereira, D. Mucida, L. Silva, A. P. D. Gonzaga, E. Machado","doi":"10.1590/2179-8087-FLORAM-2019-0077","DOIUrl":"https://doi.org/10.1590/2179-8087-FLORAM-2019-0077","url":null,"abstract":"Fragmentation of natural areas alters the natural landscape, removing native vegetation and creating an anthropic matrix. In order to better understand the consequences of grazing in areas of campo rupestre and forest, the present study aimed to analyze changes in the vegetation of Cerrado and Atlantic Forest, in the Southern Espinhaço, between 1979 and 2015. The vegetation of the study area was identified as arboreal (forest), or herbaceous or shrubby (campo rupestre) by visual classification of a mosaic of aerial photographs from 1979 and the supervised classification of land use from a Landsat 8 image from 2015. Differences in vegetation were analyzed using a transition matrix based on the “Markov model”, which indicated conversions of vegetation classes due to the misuse of land, mainly as pasture. The results indicate the conversion of arboreal vegetation area into areas of exotic herbaceous vegetation, and stability in the area of shrubby vegetation.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"71 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81730457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-floram-2020-0023
O. J. Smiderle, A. G. Souza, R. Menegatti, T. J. Dias, R. A. Montenegro
1Empresa Brasileira de Pesquisa Agropecuária, Boa Vista, RR, Brasil 2Universidade Federal da Paraíba, Departamento de Agricultura, Areia, PB, Brasil 3Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, RS, Brasil 4Universidade do Estado de Santa Catarina, Ciências Agrárias, Lages, SC, Brasil 5Universidade Federal da Paraíba, Departamento de Agricultura, Bananeiras, PB, Brasil 6Universidade Federal de Roraima, Boa Vista, RR, Brasil Abstract The aim of this study was to evaluate the initial growth of Agonandra brasiliensis Miers ex Benth. & Hook. F. in response to different levels of shading and doses of controlled-release fertiliser (CRF). The experiment was conducted at Embrapa Roraima in Boa Vista, in a completely randomised experimental design and a 2 x 5 factorial scheme, of two luminosity levels (50 and 30%) and five doses of CRF (formulation 18-05-09, NPK) (0, 0.5, 1, 2 and 3 g L-1 substrate), with five replications, each consisting of five plants. At 240 days after transplanting, the growth characteristics were evaluated, and the influence of the light levels and the CRF dose was recorded on these characteristics, either individually or interactively. It is suggested that plants of Agonandra brasiliensis be fertilised with a dose of 2 g L-1 CRF and grown in an environment with 50% of luminosity to maximize growth and efficiency in the production of high-quality seedlings.
1 Brasileira de Pesquisa公司Agropecuária，博阿维斯塔，RR，巴西2联邦大学Paraíba，农业部，阿雷亚，PB，巴西3联邦佩洛塔斯大学，校园莱奥，佩洛塔斯，RS，巴西4圣卡塔琳娜州大学，Ciências Agrárias, SC，巴西5联邦大学Paraíba，农业部门，香蕉，PB，巴西6联邦罗赖马大学，博阿维斯塔，RR，摘要本研究的目的是评价巴西角木(Agonandra brasiliensis Miers ex Benth)的初始生长。&钩。F.不同遮荫水平和控释肥料(CRF)剂量对土壤生长的影响。试验采用完全随机试验设计和2 × 5因子方案，采用2种光照水平(50%和30%)和5种剂量的CRF(配方18-05-09,NPK)(0、0.5、1、2和3 g L-1底物)，5个重复，每个重复5株。在移栽后240天，评估生长特性，并记录光照水平和CRF剂量对这些特性的影响，无论是单独的还是相互作用的。建议在2 g L-1 CRF的剂量下，在50%的光照条件下生长，以获得最大的生长效率和高质量的幼苗。
{"title":"Shading and slow release fertiliser affect early growth in seedlings of Pau-marfim","authors":"O. J. Smiderle, A. G. Souza, R. Menegatti, T. J. Dias, R. A. Montenegro","doi":"10.1590/2179-8087-floram-2020-0023","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2020-0023","url":null,"abstract":"1Empresa Brasileira de Pesquisa Agropecuária, Boa Vista, RR, Brasil 2Universidade Federal da Paraíba, Departamento de Agricultura, Areia, PB, Brasil 3Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, RS, Brasil 4Universidade do Estado de Santa Catarina, Ciências Agrárias, Lages, SC, Brasil 5Universidade Federal da Paraíba, Departamento de Agricultura, Bananeiras, PB, Brasil 6Universidade Federal de Roraima, Boa Vista, RR, Brasil Abstract The aim of this study was to evaluate the initial growth of Agonandra brasiliensis Miers ex Benth. & Hook. F. in response to different levels of shading and doses of controlled-release fertiliser (CRF). The experiment was conducted at Embrapa Roraima in Boa Vista, in a completely randomised experimental design and a 2 x 5 factorial scheme, of two luminosity levels (50 and 30%) and five doses of CRF (formulation 18-05-09, NPK) (0, 0.5, 1, 2 and 3 g L-1 substrate), with five replications, each consisting of five plants. At 240 days after transplanting, the growth characteristics were evaluated, and the influence of the light levels and the CRF dose was recorded on these characteristics, either individually or interactively. It is suggested that plants of Agonandra brasiliensis be fertilised with a dose of 2 g L-1 CRF and grown in an environment with 50% of luminosity to maximize growth and efficiency in the production of high-quality seedlings.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"49 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75310837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-FLORAM-2020-0051
Letícia Sena, T. O. Bahia, G. Fernandes
The Cerrado (Brazilian Savanna) biome suffers intense degradation due to several anthropic activities and its recovery is extremely important for the restoration of environmental quality. Therefore, the present study tested the survival and growth of seedlings of the grass Schizachyrium tenerum produced by the division of clumps. The experiment was carried out in a greenhouse using Reddish Oxisol, dystrophic of “cerrado sensu stricto” and Litholic Neosol dystrophic of quartzitic rupestrian grassland with and without the addition of limestone and NPK. Survival of S. tenerum was also compared between being grown in a greenhouse and directly in the field in full sun. Seedlings of S. tenerum had greater survival, total growth, number of tillers and accumulation of biomass when cultivated in Reddish Oxisol and Reddish Oxisol with limestone added than in the other treatments. Seedling survival was three times greater when grown in a greenhouse than in full sun.
{"title":"Vegetative Propagation of Schizachyrium tenerum (Poaceae) Under Different Substrates and Environments","authors":"Letícia Sena, T. O. Bahia, G. Fernandes","doi":"10.1590/2179-8087-FLORAM-2020-0051","DOIUrl":"https://doi.org/10.1590/2179-8087-FLORAM-2020-0051","url":null,"abstract":"The Cerrado (Brazilian Savanna) biome suffers intense degradation due to several anthropic activities and its recovery is extremely important for the restoration of environmental quality. Therefore, the present study tested the survival and growth of seedlings of the grass Schizachyrium tenerum produced by the division of clumps. The experiment was carried out in a greenhouse using Reddish Oxisol, dystrophic of “cerrado sensu stricto” and Litholic Neosol dystrophic of quartzitic rupestrian grassland with and without the addition of limestone and NPK. Survival of S. tenerum was also compared between being grown in a greenhouse and directly in the field in full sun. Seedlings of S. tenerum had greater survival, total growth, number of tillers and accumulation of biomass when cultivated in Reddish Oxisol and Reddish Oxisol with limestone added than in the other treatments. Seedling survival was three times greater when grown in a greenhouse than in full sun.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"21 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89506633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-floram-2020-0035
J. Orellana, Jociene Oliveira Vitória Nascimento, Jorge Grilo, S. P. S. Neves, L. A. P. Miranda, L. S. Funch
1Universidade Estadual de Feira de Santana, Feira de Santana, BA, Brasil. Abstract Phenological studies are considerably complemented through field data and herbarium collection databases. We examined the seasonality and relationships between leafing and reproductive phenophases using field observations and herbarium data of Campomanesia eugenioides var. desertorum, Eugenia punicifolia, and Psidium schenckianum, all native species of Myrtaceae. Field observations were performed in a caatinga remnant in Bahia State, Brazil; HUEFS herbarium collections were examined. In general, all species showed seasonal reproductive phases and aseasonal leaf phases, and Spearman correlations were observed between those phases. Field observations and herbarium collections were similar and complementary, providing clues about seasonality and the relationship between leaf and reproductive phases of Myrtaceae species.
1巴西费拉德桑塔纳大学，巴西BA费拉德桑塔纳。物候学研究在很大程度上是通过野外数据和植物标本收集数据库来补充的。本文利用桃金娘科原生种Campomanesia eugenioides var. desertorum、Eugenia punicifolia和Psidium schenckianum的野外观测资料和标本室资料，分析了叶片物候期和生殖物候期的季节性关系。在巴西巴伊亚州的卡廷加遗址进行了实地观察;对HUEFS植物标本进行了检查。总体而言，所有物种均表现出季节性繁殖期和季节性叶期，且各期之间存在Spearman相关性。野外观测结果与植物标本馆资料具有相似性和互补性，为了解桃金娘科植物的季节特征以及叶片与生殖期的关系提供了线索。
{"title":"Seasonality and the Relationships Between Reproductive and Leaf Phenophases In Myrtaceae Using Field and Herbarium Data","authors":"J. Orellana, Jociene Oliveira Vitória Nascimento, Jorge Grilo, S. P. S. Neves, L. A. P. Miranda, L. S. Funch","doi":"10.1590/2179-8087-floram-2020-0035","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2020-0035","url":null,"abstract":"1Universidade Estadual de Feira de Santana, Feira de Santana, BA, Brasil. Abstract Phenological studies are considerably complemented through field data and herbarium collection databases. We examined the seasonality and relationships between leafing and reproductive phenophases using field observations and herbarium data of Campomanesia eugenioides var. desertorum, Eugenia punicifolia, and Psidium schenckianum, all native species of Myrtaceae. Field observations were performed in a caatinga remnant in Bahia State, Brazil; HUEFS herbarium collections were examined. In general, all species showed seasonal reproductive phases and aseasonal leaf phases, and Spearman correlations were observed between those phases. Field observations and herbarium collections were similar and complementary, providing clues about seasonality and the relationship between leaf and reproductive phases of Myrtaceae species.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"28 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82695057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-floram-2021-0007
R. Batista, M. M. Gomes
Based on a systematic review, 19 case studies were selected, focusing on the production of biochar through pyrolysis of five lignocellulosic biomasses (olive husk, beech wood, corncob, spruce wood, and hazelnut shell), under constant pressure (0.1 MPa) and temperature from 650.2 to 973.0 K. Interactions between process variables (temperature, residence time of the vapor phase and heating rate), biomass chemical composition variables (lignin, holocellulose, ash, carbon, nitrogen, oxygen and hydrogen content) and biochar yield-CY were evaluated by Pearson’s correlation matrix and Principal Component Analysis-PCA. Strong correlations (|r| ≥0.75, p<0.05) were found for lignin and CY (0.78); carbon and CY (0.76); nitrogen and CY (0.77). Three variables of biomass chemical composition were the most important ones for the first principal component-PC1; process variables (heating rate and the vapour residence time) were the most important ones for the second principal component-PC2. Experiments with hazelnut shell as feedstock were associated with higher CY.
{"title":"Effects of Chemical Composition and Pyrolysis Process Variables on Biochar Yields: Correlation and Principal Component Analysis","authors":"R. Batista, M. M. Gomes","doi":"10.1590/2179-8087-floram-2021-0007","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2021-0007","url":null,"abstract":"Based on a systematic review, 19 case studies were selected, focusing on the production of biochar through pyrolysis of five lignocellulosic biomasses (olive husk, beech wood, corncob, spruce wood, and hazelnut shell), under constant pressure (0.1 MPa) and temperature from 650.2 to 973.0 K. Interactions between process variables (temperature, residence time of the vapor phase and heating rate), biomass chemical composition variables (lignin, holocellulose, ash, carbon, nitrogen, oxygen and hydrogen content) and biochar yield-CY were evaluated by Pearson’s correlation matrix and Principal Component Analysis-PCA. Strong correlations (|r| ≥0.75, p<0.05) were found for lignin and CY (0.78); carbon and CY (0.76); nitrogen and CY (0.77). Three variables of biomass chemical composition were the most important ones for the first principal component-PC1; process variables (heating rate and the vapour residence time) were the most important ones for the second principal component-PC2. Experiments with hazelnut shell as feedstock were associated with higher CY.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"32 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77361728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1590/2179-8087-floram-2018-0426
D. G. Schulz, M. Ajala, M. A. Horbach, U. C. Malavasi, M. Malavasi
Nutritional balance interferes positively in obtaining high-quality seedlings of wood species. This study aimed to evaluate nitrogen fertilization during the production of L. divaricata seedlings. The experiment was conducted in a shade house located at 24°33’S and 54°04’W, in a randomized block design formed by two forms of fertilization plus a control applied during three months, totaling nine applications, with seven replicates of five seedlings each. Both exponential and conventional fertilization regimes supported the hypothesis of growth induction of L. divaricata seedlings in relation to the control during the growth phase, with exponential fertilization as a valid option to reduce initial nutrient loss by leaching.
{"title":"Exponential Nitrogen Fertilization of Luehea divaricata Mart. Seedlings","authors":"D. G. Schulz, M. Ajala, M. A. Horbach, U. C. Malavasi, M. Malavasi","doi":"10.1590/2179-8087-floram-2018-0426","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2018-0426","url":null,"abstract":"Nutritional balance interferes positively in obtaining high-quality seedlings of wood species. This study aimed to evaluate nitrogen fertilization during the production of L. divaricata seedlings. The experiment was conducted in a shade house located at 24°33’S and 54°04’W, in a randomized block design formed by two forms of fertilization plus a control applied during three months, totaling nine applications, with seven replicates of five seedlings each. Both exponential and conventional fertilization regimes supported the hypothesis of growth induction of L. divaricata seedlings in relation to the control during the growth phase, with exponential fertilization as a valid option to reduce initial nutrient loss by leaching.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":"47 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83341131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：