Pub Date : 2023-09-01DOI: 10.1590/2179-8087-floram-2023-0009
Fabricio Eulálio Leite Carvalho, A. I. Prato, Jairo Rojas-Molina
Lecythis tuyrana is an endemic tree in the Magdalena River basin in Colombia with unexplored forestry, nutraceutical, medicinal and nutritional potential. In the nursery, two experiments on the production of L. tuyrana seedling were evaluated. In the first experiment, three container volumes and the absence or presence (3 g L -1 ) of a controlled-release fertilizer (CRF) were evaluated. The use of tube trays (700 cm 3 ) and CRF significantly increased the height, biomass, and Dickson quality index of the seedlings (between 28 to 61 %) compared to those not fertilized. In the second experiment the light acclimation of seedlings was evaluated in two environments: full sun at 50% and 100%. There were no changes in photosynthetic rates when the seedlings were kept in the shade for longer, but there was a lesser accumulation of biomass. A light intensity of approximately 1 600 µmol m -2 s -1 is considered optimal for L . tuyrana seedling.
{"title":"Quality of Lecythis tuyrana Pittier Seedlings Using Controlled-Release Fertilizer, Volumes of Container and Light Acclimatation","authors":"Fabricio Eulálio Leite Carvalho, A. I. Prato, Jairo Rojas-Molina","doi":"10.1590/2179-8087-floram-2023-0009","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2023-0009","url":null,"abstract":"Lecythis tuyrana is an endemic tree in the Magdalena River basin in Colombia with unexplored forestry, nutraceutical, medicinal and nutritional potential. In the nursery, two experiments on the production of L. tuyrana seedling were evaluated. In the first experiment, three container volumes and the absence or presence (3 g L -1 ) of a controlled-release fertilizer (CRF) were evaluated. The use of tube trays (700 cm 3 ) and CRF significantly increased the height, biomass, and Dickson quality index of the seedlings (between 28 to 61 %) compared to those not fertilized. In the second experiment the light acclimation of seedlings was evaluated in two environments: full sun at 50% and 100%. There were no changes in photosynthetic rates when the seedlings were kept in the shade for longer, but there was a lesser accumulation of biomass. A light intensity of approximately 1 600 µmol m -2 s -1 is considered optimal for L . tuyrana seedling.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80546525","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 : 2023-08-28DOI: 10.1590/2179-8087-floram-2022-0076
Thaiana Brunes Feitosa, M. M. Fernandes, M. R. D. M. Fernandes, Renisson Neponuceno de Araújo Filho
The Amazon Rainforest presents intense pressure from agricultural and cattle farming activities on its forest remnants, which promotes forest fragmentation. The present study aimed to quantify structural changes in the Amazon Rainforest landscape in the state of Tocantins, Brazil, that occurred between 1985 and 2020 using Mapbiomas data and landscape metrics. MAPBIOMS images were used to delimit forest fragments and size classes. Landscape metrics were estimated using the Fragstats® software. In the state of Tocantins, the Amazon Rainforest, grassland, and savanna showed a fragmentation process between 1985 and 2020, with a reduction in their total area and the number of fragments, with less rounded shapes and loss of core areas, in need of environmental policies to protect forest remnants and interrupt the process of Forest fragmentation, especially the Amazon Rainforest.
{"title":"Temporal Analysis of Forest Fragmentation in the Amazon Rainforest of Tocantins State, Brazil","authors":"Thaiana Brunes Feitosa, M. M. Fernandes, M. R. D. M. Fernandes, Renisson Neponuceno de Araújo Filho","doi":"10.1590/2179-8087-floram-2022-0076","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0076","url":null,"abstract":"The Amazon Rainforest presents intense pressure from agricultural and cattle farming activities on its forest remnants, which promotes forest fragmentation. The present study aimed to quantify structural changes in the Amazon Rainforest landscape in the state of Tocantins, Brazil, that occurred between 1985 and 2020 using Mapbiomas data and landscape metrics. MAPBIOMS images were used to delimit forest fragments and size classes. Landscape metrics were estimated using the Fragstats® software. In the state of Tocantins, the Amazon Rainforest, grassland, and savanna showed a fragmentation process between 1985 and 2020, with a reduction in their total area and the number of fragments, with less rounded shapes and loss of core areas, in need of environmental policies to protect forest remnants and interrupt the process of Forest fragmentation, especially the Amazon Rainforest.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89390651","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 : 2023-08-21DOI: 10.1590/2179-8087-floram-2022-0088
Paula Letícia Wolff Kettenhuber, Diego Aniceto dos Santos Oliveira, S. V. Martins
Soil and water bioengineering (SWBE) is a feasible, economical and ecologically friendly alternative to restore the riparian forest areas affected by the Brumadinho mining tailings dam rupture. We evaluated the vegetative propagation capacity by cuttings and initial development of nine native riparian species of the Paraobepa River for use in SWBE techniques. From the results it is possible to separate the species into two distinct groups, namely those that can resprout and produce roots from their cuttings (group 1: Acnistus arborescens (L.) Schltdl., Croton urucurana Baill., Gymnanthes schottiana Müll.Arg., Indigofera suffruticosa Mill. and Sesbania virgata (Cav.) Poir.) and are suitable for use as live cuttings in SWBE techniques; and those which were only able to produce shoots (group 2: Casearia decandra Jacq., Chrysophyllum marginatum (Hook. & Arn.) Radlk., Inga vera Willd. and Schinus terebinthifolia Raddi) and should only be used in seedling form to increase the diversity of the interventions.
{"title":"Selecting Native Species for Soil and Water Bioengineering Techniques: Alternative to Restore Areas in Brumadinho, MG, Brazil","authors":"Paula Letícia Wolff Kettenhuber, Diego Aniceto dos Santos Oliveira, S. V. Martins","doi":"10.1590/2179-8087-floram-2022-0088","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0088","url":null,"abstract":"Soil and water bioengineering (SWBE) is a feasible, economical and ecologically friendly alternative to restore the riparian forest areas affected by the Brumadinho mining tailings dam rupture. We evaluated the vegetative propagation capacity by cuttings and initial development of nine native riparian species of the Paraobepa River for use in SWBE techniques. From the results it is possible to separate the species into two distinct groups, namely those that can resprout and produce roots from their cuttings (group 1: Acnistus arborescens (L.) Schltdl., Croton urucurana Baill., Gymnanthes schottiana Müll.Arg., Indigofera suffruticosa Mill. and Sesbania virgata (Cav.) Poir.) and are suitable for use as live cuttings in SWBE techniques; and those which were only able to produce shoots (group 2: Casearia decandra Jacq., Chrysophyllum marginatum (Hook. & Arn.) Radlk., Inga vera Willd. and Schinus terebinthifolia Raddi) and should only be used in seedling form to increase the diversity of the interventions.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78001285","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 : 2023-08-18DOI: 10.1590/2179-8087-floram-2022-0078
C. C. Lima, E. Borge, E. S. Gurgel
Temperature may affect the mobilization and hydrolysis of storage reserves for energy production during seed germination. This study investigated germination performance and reserve mobilization in Dalbergia spruceana Benth. seeds incubation at 20, 25, 30, 35, and 40°C. The germination process was favored by incubation at 25 to 35°C and negatively affected at 20 and 40°C. At 35°C there reduction in germination speed, however, without significantly compromising the final germination percentage. The results showed that lipids and proteins are the predominant metabolites in D. spruceana seeds. Mobilization of soluble sugars was highest at 25 and 30°C. At 20 and 40°C, mobilization occurred more slowly, negatively affecting germination. This finding, combined with changes in lipid and protein reserves, suggests that lipid and protein hydrolysis products were used for starch synthesis. Reserve mobilization patterns in D. spruceana embryos were influenced by germination temperature, with the highest utilization efficiency occurring between 25 and 35°C.
{"title":"Mobilization of Storage Reserves in Dalbergia spruceana Benth. (Fabaceae) Seeds During Germination at Different Temperatures","authors":"C. C. Lima, E. Borge, E. S. Gurgel","doi":"10.1590/2179-8087-floram-2022-0078","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0078","url":null,"abstract":"Temperature may affect the mobilization and hydrolysis of storage reserves for energy production during seed germination. This study investigated germination performance and reserve mobilization in Dalbergia spruceana Benth. seeds incubation at 20, 25, 30, 35, and 40°C. The germination process was favored by incubation at 25 to 35°C and negatively affected at 20 and 40°C. At 35°C there reduction in germination speed, however, without significantly compromising the final germination percentage. The results showed that lipids and proteins are the predominant metabolites in D. spruceana seeds. Mobilization of soluble sugars was highest at 25 and 30°C. At 20 and 40°C, mobilization occurred more slowly, negatively affecting germination. This finding, combined with changes in lipid and protein reserves, suggests that lipid and protein hydrolysis products were used for starch synthesis. Reserve mobilization patterns in D. spruceana embryos were influenced by germination temperature, with the highest utilization efficiency occurring between 25 and 35°C.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83065357","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 : 2023-07-14DOI: 10.1590/2179-8087-floram-2022-0064
Anna Cláudia Miranda Campos, G. Costa, Everton Hilo Souza, Aurélio José Antunes de Carvalho, L. Aona
The objective of this study was to carry out an inventory of the vascular plant species of Serra do Jatobá in the municipality of Milagres, Bahia. The survey included species of all habits and respective degrees of endemism, phytogeographic domains and threat categories, to contribute data about the flora of the Bahia semiarid region to enable management and preservation of species, to support the future creation of conservation units in Bahia inselbergs. We recorded 317 species, 208 genera and 71 families, with predominance of species belonging to the Bromeliaceae, Fabaceae, Euphorbiaceae and Asteraceae families. We identified 53 endemic species of the Caatinga, and 18 exclusive to the Atlantic Forest. Of these species, 24 are endemic to Bahia and five species are considered vulnerable. The floristic survey of Serra do Jatobá demonstrated high biodiversity, reinforcing the importance of ongoing research in the area for the implementation of a conservation unit.
{"title":"Between Caatinga and Atlantic Forest: Floristic Composition in a Transition Area in Northeast Brazil","authors":"Anna Cláudia Miranda Campos, G. Costa, Everton Hilo Souza, Aurélio José Antunes de Carvalho, L. Aona","doi":"10.1590/2179-8087-floram-2022-0064","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0064","url":null,"abstract":"The objective of this study was to carry out an inventory of the vascular plant species of Serra do Jatobá in the municipality of Milagres, Bahia. The survey included species of all habits and respective degrees of endemism, phytogeographic domains and threat categories, to contribute data about the flora of the Bahia semiarid region to enable management and preservation of species, to support the future creation of conservation units in Bahia inselbergs. We recorded 317 species, 208 genera and 71 families, with predominance of species belonging to the Bromeliaceae, Fabaceae, Euphorbiaceae and Asteraceae families. We identified 53 endemic species of the Caatinga, and 18 exclusive to the Atlantic Forest. Of these species, 24 are endemic to Bahia and five species are considered vulnerable. The floristic survey of Serra do Jatobá demonstrated high biodiversity, reinforcing the importance of ongoing research in the area for the implementation of a conservation unit.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89354052","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 : 2023-04-07DOI: 10.1590/2179-8087-floram-2022-0075
Jéssica Costa de Oliveira, Arlen Nicson Lopes Pena, Warley Rodrigues de Oliveira, L. A. Fernandes, F. Colen, E. Ferreira, Maria D. M. Veloso, L. A. Frazão
The objective of this study was to evaluate the effect of filter cake biochar on the chemical and microbiological attributes of a dystrophic red-yellow latosol cultivated with macaúba ( Acrocomia aculeata ), araçá ( Psidium firmum ) and cajuzinho do cerrado ( Anacardium humile ), species native to the Cerrado. Thus, the responses of soil attributes were evaluated 120 days after transplanting the seedlings using four doses of biochar (1%, 2%, 4% and 8% v/v) and two control treatments (one with soil correction and fertilization and the other with no fertilization). The attributes evaluated were pH, contents of calcium, magnesium, phosphorus, potassium, CTC, total and microbial organic carbon and nitrogen, and C:N ratio. For the soils cultivated with the three Cerrado species, the 1% dose of biochar and mineral fertilization were the treatments that best conditioned the soil during the cultivation period and promoted a better response of the chemical and microbiological attributes of the soil.
{"title":"Filter Cake Biochar as a Soil Conditioner Cultivated with Native Cerrado Species: Effect on Soil Chemical and Microbiological Properties","authors":"Jéssica Costa de Oliveira, Arlen Nicson Lopes Pena, Warley Rodrigues de Oliveira, L. A. Fernandes, F. Colen, E. Ferreira, Maria D. M. Veloso, L. A. Frazão","doi":"10.1590/2179-8087-floram-2022-0075","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0075","url":null,"abstract":"The objective of this study was to evaluate the effect of filter cake biochar on the chemical and microbiological attributes of a dystrophic red-yellow latosol cultivated with macaúba ( Acrocomia aculeata ), araçá ( Psidium firmum ) and cajuzinho do cerrado ( Anacardium humile ), species native to the Cerrado. Thus, the responses of soil attributes were evaluated 120 days after transplanting the seedlings using four doses of biochar (1%, 2%, 4% and 8% v/v) and two control treatments (one with soil correction and fertilization and the other with no fertilization). The attributes evaluated were pH, contents of calcium, magnesium, phosphorus, potassium, CTC, total and microbial organic carbon and nitrogen, and C:N ratio. For the soils cultivated with the three Cerrado species, the 1% dose of biochar and mineral fertilization were the treatments that best conditioned the soil during the cultivation period and promoted a better response of the chemical and microbiological attributes of the soil.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80517933","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 : 2023-04-03DOI: 10.1590/2179-8087-floram-2022-0050
Pedro Jeronimo de Carvalho Neves Cavalcante, R. Michel, Maurício Santana Moreau, A. Paiva, R. Noronha, Tássio Moreira Silva
Abstract The cocoa cabruca is as an agroforestry system with a density of trees equal to or greater than twenty individuals of native species per hectare cultivated in association with native or exotic trees in a discontinuous and random way in the Atlantic Forest biome.It is difficult to separate areas of cabruca cacao from the Dense Ombrophilous Forest by existing satellite imaging techniques.The study was developed in the southern region of Bahia, on two properties in the municipalities of Ilhéus and Uruçuca.The image processing methodology involved the Agisoft Photoscan software, with the multiresolution algorithm, the analysis of digital image data was performed to extract the objects and with the Feature Space Optimization tool, the set of variables that presented the best separation between land use classes.The use of UAVs was effective in classifying the mapped areas, and its use was proposed as an auxiliary tool in the application of the Decree.
{"title":"Spectral Evaluation of Cocoa: A Methodological Proposal for its Management and Application of the Cabruca Decree","authors":"Pedro Jeronimo de Carvalho Neves Cavalcante, R. Michel, Maurício Santana Moreau, A. Paiva, R. Noronha, Tássio Moreira Silva","doi":"10.1590/2179-8087-floram-2022-0050","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0050","url":null,"abstract":"Abstract The cocoa cabruca is as an agroforestry system with a density of trees equal to or greater than twenty individuals of native species per hectare cultivated in association with native or exotic trees in a discontinuous and random way in the Atlantic Forest biome.It is difficult to separate areas of cabruca cacao from the Dense Ombrophilous Forest by existing satellite imaging techniques.The study was developed in the southern region of Bahia, on two properties in the municipalities of Ilhéus and Uruçuca.The image processing methodology involved the Agisoft Photoscan software, with the multiresolution algorithm, the analysis of digital image data was performed to extract the objects and with the Feature Space Optimization tool, the set of variables that presented the best separation between land use classes.The use of UAVs was effective in classifying the mapped areas, and its use was proposed as an auxiliary tool in the application of the Decree.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82937286","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 : 2023-03-10DOI: 10.1590/2179-8087-floram-2022-0080
J. Dias-Pereira, G. C. Andrade, Luiz Menini Neto, L. C. Silva, Flávia Bonizol Ferrari, R. F. Ribas, A. A. Azevedo
Vascular epiphytes contribute significantly to the biodiversity of tropical forests. We aimed to identify the epiphyte species occurring in the Muriqui Trail at Serra do Brigadeiro State Park (SBSP), a priority area for Atlantic forest conservation in southeastern Brazil. We selected 10 phorophytes, from which we sampled epiphytes and took light intensity measurements at three strata: up to 4 m, 4 to 8 m, and above 8 m. Phorophytes represented eight species, eight genera, and six families. We found 25 epiphytic species from 17 genera and nine families. Ferns showed highest richness, especially Polypodiaceae. We report herein important data on epiphyte diversity in eastern Minas Gerais state (Zona da Mata), including the occurrence of species rarely cited in surveys. Fomenting local conservation along with environmental education may be pivotal for counteracting anthropic pressure on SBSP.
{"title":"Vascular Epiphyte Diversity in a Key Atlantic Forest Remnant from Minas Gerais State, Southeastern Brazil","authors":"J. Dias-Pereira, G. C. Andrade, Luiz Menini Neto, L. C. Silva, Flávia Bonizol Ferrari, R. F. Ribas, A. A. Azevedo","doi":"10.1590/2179-8087-floram-2022-0080","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0080","url":null,"abstract":"Vascular epiphytes contribute significantly to the biodiversity of tropical forests. We aimed to identify the epiphyte species occurring in the Muriqui Trail at Serra do Brigadeiro State Park (SBSP), a priority area for Atlantic forest conservation in southeastern Brazil. We selected 10 phorophytes, from which we sampled epiphytes and took light intensity measurements at three strata: up to 4 m, 4 to 8 m, and above 8 m. Phorophytes represented eight species, eight genera, and six families. We found 25 epiphytic species from 17 genera and nine families. Ferns showed highest richness, especially Polypodiaceae. We report herein important data on epiphyte diversity in eastern Minas Gerais state (Zona da Mata), including the occurrence of species rarely cited in surveys. Fomenting local conservation along with environmental education may be pivotal for counteracting anthropic pressure on SBSP.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77290825","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 : 2023-03-03DOI: 10.1590/2179-8087-floram-2022-0079
José Carlos Cardozo, A. M. Carvalho, L. A. R. Batalha, F. J. Gomes, Raquel Nery Cardozo, Mariana Silva Salomão, Leonardo Amador Cruz
The rising popularity of various types of wood panels and the advances in manufacturing technology have increased the uses of wood. The bonding of fibers and particles to form panels, however, involves impregnation with resins, such as phenolic adhesives, which delivery desirable quality to the panels due to their insolubility in water, resistance against heat among others, but are also recognized as carcinogenic to humans (IARC, 2004). This study involved measuring the levels of formaldehyde, remaining in wood panels after use and disposal. It was initially evaluated new panels and then examined degraded ones. The results demonstrated significant volatilization of formaldehyde during the degradation process of the panels, with losses of 74.83% for MDF and 85.71% for medium density particleboards (MDP). The results demonstrated significant volatilization of formaldehyde during the degradation process of the panels, with losses of 74.83% for MDF and 85.71% for medium density particleboards (MDP).
{"title":"Evaluation of the Emission of Formaldehyde from Wood-Based Panels (MDFs and MDPs) in Brazil After Use","authors":"José Carlos Cardozo, A. M. Carvalho, L. A. R. Batalha, F. J. Gomes, Raquel Nery Cardozo, Mariana Silva Salomão, Leonardo Amador Cruz","doi":"10.1590/2179-8087-floram-2022-0079","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0079","url":null,"abstract":"The rising popularity of various types of wood panels and the advances in manufacturing technology have increased the uses of wood. The bonding of fibers and particles to form panels, however, involves impregnation with resins, such as phenolic adhesives, which delivery desirable quality to the panels due to their insolubility in water, resistance against heat among others, but are also recognized as carcinogenic to humans (IARC, 2004). This study involved measuring the levels of formaldehyde, remaining in wood panels after use and disposal. It was initially evaluated new panels and then examined degraded ones. The results demonstrated significant volatilization of formaldehyde during the degradation process of the panels, with losses of 74.83% for MDF and 85.71% for medium density particleboards (MDP). The results demonstrated significant volatilization of formaldehyde during the degradation process of the panels, with losses of 74.83% for MDF and 85.71% for medium density particleboards (MDP).","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88500859","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 : 2023-03-03DOI: 10.1590/2179-8087-floram-2022-0031
Rosaina de Sousa Venega, Renata Carvalho da Silva, Thaiury Oliveira Sousa, Karolayne Ferreira Saraiva, C. J. G. Colares, P. L. Loiola, D. A. Silva, R. Marchesan
Abstract This work aimed to evaluate the energy quality of wood and charcoal obtained from the stem and root of the genus Eucalyptus spp. From the wood, the physical, chemical and energetic properties were evaluated. For the charcoal produced in ovens of the carbonization furnaces model in the industry and produced in a muffle furnace, the physical, chemical and energetic properties were evaluated. Based on the analysis of technological properties, wood from the root has higher basic density (731.45 kg m-3) and lignin content (26.44%), however, the fixed carbon content and higher calorific value of the root (17.54% and 4547.75 kcal kg-1) were lower than for the stem wood (21.36% and 4730.82 kcal kg-1). It is recommended to use the wood from the root, both for direct burning and for the production of charcoal. The charcoal obtained in the industry, compared to that produced in muffle, presented higher energy quality.
{"title":"Energy Quality of Wood and Charcoal from the Stem and Root of Eucalyptus spp.","authors":"Rosaina de Sousa Venega, Renata Carvalho da Silva, Thaiury Oliveira Sousa, Karolayne Ferreira Saraiva, C. J. G. Colares, P. L. Loiola, D. A. Silva, R. Marchesan","doi":"10.1590/2179-8087-floram-2022-0031","DOIUrl":"https://doi.org/10.1590/2179-8087-floram-2022-0031","url":null,"abstract":"Abstract This work aimed to evaluate the energy quality of wood and charcoal obtained from the stem and root of the genus Eucalyptus spp. From the wood, the physical, chemical and energetic properties were evaluated. For the charcoal produced in ovens of the carbonization furnaces model in the industry and produced in a muffle furnace, the physical, chemical and energetic properties were evaluated. Based on the analysis of technological properties, wood from the root has higher basic density (731.45 kg m-3) and lignin content (26.44%), however, the fixed carbon content and higher calorific value of the root (17.54% and 4547.75 kcal kg-1) were lower than for the stem wood (21.36% and 4730.82 kcal kg-1). It is recommended to use the wood from the root, both for direct burning and for the production of charcoal. The charcoal obtained in the industry, compared to that produced in muffle, presented higher energy quality.","PeriodicalId":46895,"journal":{"name":"Floresta e Ambiente","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85474458","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}
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