M. S. Kulmann, G. Dick, Humberto de Jesus Eufrade-Junior, S. Guerra, Mauro Valdir Schumacher
of the the parameters of Engelm. stand in Abstract Planted forests make use of strategies to increase the efficiency in the use of available soil resources, such as the production of fine roots to absorb nutrients and water which are factors limiting tree growth. Thus, the assessment of fine roots production in forest stand is crucial to understand the tree nutrient dynamic. This study aims to evaluate the interaction between physical-chemical attributes of a Rhodic Paleudult soil and the distribution of the fine roots of a Pinus elliottii plantation grown in southern Brazil. Biomass and density of fine roots, calcium (Ca), magnesium (Mg), soil organic matter (SOM), pH, base saturation and cations exchange capacity, clay, and soil density, at soil depths of 0-5, 5-10, 10-15 and 15-20 cm, were evaluated. The total production of fine roots biomass in the 0-20 cm layer produced was 824.9 kg ha -1 , with greater accumulation in the 0-10 cm layer, where 57.4% of the total fine roots were concentrated. The fine roots density varied from 0.38 to 0.53 g dm -3 , decreasing in subsurface layers of 10-20 cm. The biomass and density of fine roots of P. elliottii were influenced by the higher concentrations of Ca, Mg, SOM, pH, base saturation, and cations exchange capacity, which can contribute to greater absorption of nutrients and, consequently, increase in productivity of a plantation.
恩格尔的参数。人工林林分利用各种策略来提高有效土壤资源的利用效率，如产生细根来吸收限制树木生长的养分和水分。因此，评价林分细根产量对了解树木养分动态具有重要意义。本研究旨在评价巴西南部罗迪奇古生代土壤理化属性与油松人工林细根分布之间的相互作用。研究了土壤深度为0-5、5-10、10-15和15-20 cm的细根生物量和密度、钙(Ca)、镁(Mg)、土壤有机质(SOM)、pH、碱饱和度和阳离子交换容量、粘土和土壤密度。0 ~ 20 cm层细根生物量总量为824.9 kg ha -1，其中0 ~ 10 cm层积累量较大，占总细根生物量的57.4%。细根密度在0.38 ~ 0.53 g / dm -3之间变化，在10 ~ 20 cm的地下层逐渐减小。较高的Ca、Mg、SOM、pH、碱饱和度和阳离子交换容量会影响油松细根的生物量和密度，从而促进养分的吸收，从而提高人工林的生产力。
{"title":"Soil physical-chemical aspects influence the fine roots parameters of Pinus elliottii Engelm. stands in southern Brazil","authors":"M. S. Kulmann, G. Dick, Humberto de Jesus Eufrade-Junior, S. Guerra, Mauro Valdir Schumacher","doi":"10.18671/scifor.v50.17","DOIUrl":"https://doi.org/10.18671/scifor.v50.17","url":null,"abstract":"of the the parameters of Engelm. stand in Abstract Planted forests make use of strategies to increase the efficiency in the use of available soil resources, such as the production of fine roots to absorb nutrients and water which are factors limiting tree growth. Thus, the assessment of fine roots production in forest stand is crucial to understand the tree nutrient dynamic. This study aims to evaluate the interaction between physical-chemical attributes of a Rhodic Paleudult soil and the distribution of the fine roots of a Pinus elliottii plantation grown in southern Brazil. Biomass and density of fine roots, calcium (Ca), magnesium (Mg), soil organic matter (SOM), pH, base saturation and cations exchange capacity, clay, and soil density, at soil depths of 0-5, 5-10, 10-15 and 15-20 cm, were evaluated. The total production of fine roots biomass in the 0-20 cm layer produced was 824.9 kg ha -1 , with greater accumulation in the 0-10 cm layer, where 57.4% of the total fine roots were concentrated. The fine roots density varied from 0.38 to 0.53 g dm -3 , decreasing in subsurface layers of 10-20 cm. The biomass and density of fine roots of P. elliottii were influenced by the higher concentrations of Ca, Mg, SOM, pH, base saturation, and cations exchange capacity, which can contribute to greater absorption of nutrients and, consequently, increase in productivity of a plantation.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"11 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90815590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Moisés Rodrigues Silva, Keren Hapuque Mendes de Castro, Amanda Magda Almeida Santos, M. G. Cunha, E. Marques
inhibiting vitro of Abstract This study was carried out to evaluate the antibacterial potential of Eucalyptus spp. against two strains of the plant pathogenic bacterium Xanthomonas campestris pv. campestris ( Xcc ). The treatments consisted of aqueous and hydroethanolic extracts, at concentrations of 50% (experiment 1) and 35% and 15% (experiment 2), which were studied by the double layer inhibition test. The evaluated species were E. camaldulensis, E. cloeziana, E. grandis, E. “urograndis” and E. urophylla . Based on the results of experiment 1, it was observed that most of the extracts that inhibited the growth of the bacterial strains tested were hydroethanolic, except for the aqueous extract of the E. “urograndis” hybrid. Regarding experiment 2, it was observed that the greatest inhibition was with the concentrated extracts (35%), but the difference for the antibacterial effect was not significant in this case. Comparing the experiments, it was observed that in general the concentrated extracts (50%) had greater inhibition than the diluted ones. These results represent the potential of aromatic plants in the ecological management of Xcc , with emphasis on the aqueous and hydroethanolic extracts of E. cloeziana . Subsequently, bioassays will be performed to verify the effectiveness of such extracts in vivo .
{"title":"Eucalyptus species extracts inhibiting in vitro growth of the phytobacterium Xanthomonas campestris pv. campestris","authors":"Moisés Rodrigues Silva, Keren Hapuque Mendes de Castro, Amanda Magda Almeida Santos, M. G. Cunha, E. Marques","doi":"10.18671/scifor.v50.13","DOIUrl":"https://doi.org/10.18671/scifor.v50.13","url":null,"abstract":"inhibiting vitro of Abstract This study was carried out to evaluate the antibacterial potential of Eucalyptus spp. against two strains of the plant pathogenic bacterium Xanthomonas campestris pv. campestris ( Xcc ). The treatments consisted of aqueous and hydroethanolic extracts, at concentrations of 50% (experiment 1) and 35% and 15% (experiment 2), which were studied by the double layer inhibition test. The evaluated species were E. camaldulensis, E. cloeziana, E. grandis, E. “urograndis” and E. urophylla . Based on the results of experiment 1, it was observed that most of the extracts that inhibited the growth of the bacterial strains tested were hydroethanolic, except for the aqueous extract of the E. “urograndis” hybrid. Regarding experiment 2, it was observed that the greatest inhibition was with the concentrated extracts (35%), but the difference for the antibacterial effect was not significant in this case. Comparing the experiments, it was observed that in general the concentrated extracts (50%) had greater inhibition than the diluted ones. These results represent the potential of aromatic plants in the ecological management of Xcc , with emphasis on the aqueous and hydroethanolic extracts of E. cloeziana . Subsequently, bioassays will be performed to verify the effectiveness of such extracts in vivo .","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"29 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76183542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Noemi Cristina de Souza Vieira, Enes Furlani Junior, Raiana Crepaldi de Faria Nocchi, A. P. Paixão, M. Pereira, Erivaldo José Scaloppi Junior, Dayane Bortoloto Silva
{"title":"Eficiência nutricional de porta-enxertos de seringueira","authors":"Noemi Cristina de Souza Vieira, Enes Furlani Junior, Raiana Crepaldi de Faria Nocchi, A. P. Paixão, M. Pereira, Erivaldo José Scaloppi Junior, Dayane Bortoloto Silva","doi":"10.18671/scifor.v50.12","DOIUrl":"https://doi.org/10.18671/scifor.v50.12","url":null,"abstract":"","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"110 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76303382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vaisakhy Prem Chand, Arun Sukumaran, V. P. Khanduri
The study has been conducted in a temperate forest of north-west Himalaya, India at an altitude of 1600-2192 m asl to determine the reproductive phenological shift and the subsequent impact on pollination in Rhododendron arboreum in a temperate Himalayan forest. Phenological study and pollination observations in Rhododendron arboreum were carried out in two reproductive seasons (2016 and 2017) in a mixed broadleaved and conifer temperate forest. Floral morphology of R. arboreum was typically adapted to bird pollination and there was advancement of flowering by 5 days in first flowering and 9 days in termination of flowering in the year 2017 than that of the year 2016. The onset of flowering in R. arboreum was attributed mainly due to the scarcity of winter precipitation regardless of temperature variations. Ornithophily in assistance with entomophily would enhance the reproductive success by stimulating the magnitude of the visits through providing optimum resources.
{"title":"Reproductive phenology and floral visitors in Rhododendron arboreum (Ericaceae) in a temperate forest of Garhwal Himalaya","authors":"Vaisakhy Prem Chand, Arun Sukumaran, V. P. Khanduri","doi":"10.18671/scifor.v50.11","DOIUrl":"https://doi.org/10.18671/scifor.v50.11","url":null,"abstract":"The study has been conducted in a temperate forest of north-west Himalaya, India at an altitude of 1600-2192 m asl to determine the reproductive phenological shift and the subsequent impact on pollination in Rhododendron arboreum in a temperate Himalayan forest. Phenological study and pollination observations in Rhododendron arboreum were carried out in two reproductive seasons (2016 and 2017) in a mixed broadleaved and conifer temperate forest. Floral morphology of R. arboreum was typically adapted to bird pollination and there was advancement of flowering by 5 days in first flowering and 9 days in termination of flowering in the year 2017 than that of the year 2016. The onset of flowering in R. arboreum was attributed mainly due to the scarcity of winter precipitation regardless of temperature variations. Ornithophily in assistance with entomophily would enhance the reproductive success by stimulating the magnitude of the visits through providing optimum resources.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"17 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88827428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maria de Fátima de Queiroz Lopes, L. K. S. Lima, J. Ferreira, T. I. Silva, R. Bruno
In semi-arid regions, water deficit occurs for long periods, but the adaptation mechanisms developed by endemic species are little known. The objective of this study was to determine the tolerance of Luetzelburguia auriculata (Allemão) Ducke seedlings to water stress regarding germination and seedling establishment related to seeds’ mass. The experiment was conducted in a completely randomized design in a 2 x 5 factorial scheme, with two classes of seeds (ligh t < 0.35 g and heavy ≥ 0.35 g) and five osmotic potential levels (-0.2; -0.4; -0.6; -0.8 and -1.0 MPa), distributed in four replications of 25 seeds per plot. The following parameters were evaluated: germination rate (GR), first germination count (FGC), germination speed index (GSI), mean germination time (MGT), root length (RL), fresh and cotyledon dry mass (CFM/CDM) and fresh and dry root mass (RFM/RDM). As the osmotic potential became more negative, there was a reduction in physiological variables. The h eavy seeds (≥ 0.35 g) showed increases when compared to light seeds (<0.35 g), of 15.73, 22.94, 15.02, 23.33, 31.43, 21.43% for the variables GR, FGC, RL, CFM, CDM and RFM, respectively. Therefore, heavy seeds are more tolerant to water stress and should be prioritized for the recovery of degraded areas, especially in places with low rainfall.
{"title":"Seed mass modulates tolerance to water deficit in Luetzelburgia auriculata (Allemão) Ducke seedling","authors":"Maria de Fátima de Queiroz Lopes, L. K. S. Lima, J. Ferreira, T. I. Silva, R. Bruno","doi":"10.18671/scifor.v50.15","DOIUrl":"https://doi.org/10.18671/scifor.v50.15","url":null,"abstract":"In semi-arid regions, water deficit occurs for long periods, but the adaptation mechanisms developed by endemic species are little known. The objective of this study was to determine the tolerance of Luetzelburguia auriculata (Allemão) Ducke seedlings to water stress regarding germination and seedling establishment related to seeds’ mass. The experiment was conducted in a completely randomized design in a 2 x 5 factorial scheme, with two classes of seeds (ligh t < 0.35 g and heavy ≥ 0.35 g) and five osmotic potential levels (-0.2; -0.4; -0.6; -0.8 and -1.0 MPa), distributed in four replications of 25 seeds per plot. The following parameters were evaluated: germination rate (GR), first germination count (FGC), germination speed index (GSI), mean germination time (MGT), root length (RL), fresh and cotyledon dry mass (CFM/CDM) and fresh and dry root mass (RFM/RDM). As the osmotic potential became more negative, there was a reduction in physiological variables. The h eavy seeds (≥ 0.35 g) showed increases when compared to light seeds (<0.35 g), of 15.73, 22.94, 15.02, 23.33, 31.43, 21.43% for the variables GR, FGC, RL, CFM, CDM and RFM, respectively. Therefore, heavy seeds are more tolerant to water stress and should be prioritized for the recovery of degraded areas, especially in places with low rainfall.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"12 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85507628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vanessa Pulcheria Pinheiro Costa, Alan Cauê de Holanda, M. D. P. Costa, Ana Luiza da Silva Lopes-Nunes
espécies com SB. Apenas os setores SA e SC apresentam espécies indicadoras e, independente dos distúrbios relatados, observou-se a capacidade de resiliência pela introdução e colonização de espécies pioneiras e o consequente aumento na riqueza e diversidade. Abstract Considering the changes in the Atlantic Forest biome, this study aimed to investigate possible variations in the structure and composition of shrub-tree communities in three sectors of an Atlantic Forest fragment located in the municipality of Arez/RN, Brazil. Twenty-five 20 m x 20 m sampling units were allocated, dividing the remainder into disturbances, resilience was observed through the introduction and colonization of pioneer species and the consequent increase in richness and diversity.
{"title":"Estrutura da vegetação como indicador de distúrbio e resiliência em unidade de conservação na Mata Atlântica","authors":"Vanessa Pulcheria Pinheiro Costa, Alan Cauê de Holanda, M. D. P. Costa, Ana Luiza da Silva Lopes-Nunes","doi":"10.18671/scifor.v50.14","DOIUrl":"https://doi.org/10.18671/scifor.v50.14","url":null,"abstract":"espécies com SB. Apenas os setores SA e SC apresentam espécies indicadoras e, independente dos distúrbios relatados, observou-se a capacidade de resiliência pela introdução e colonização de espécies pioneiras e o consequente aumento na riqueza e diversidade. Abstract Considering the changes in the Atlantic Forest biome, this study aimed to investigate possible variations in the structure and composition of shrub-tree communities in three sectors of an Atlantic Forest fragment located in the municipality of Arez/RN, Brazil. Twenty-five 20 m x 20 m sampling units were allocated, dividing the remainder into disturbances, resilience was observed through the introduction and colonization of pioneer species and the consequent increase in richness and diversity.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"60 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84962008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Almeida, E. Picoli, Jordão Cabral Moulin, Lúcio M. S. Guimarães, Edval Angelo Valverde Zauza, Rodolfo Araújo Loos, Kevin Brown Hall, Danielly Silveira Gomes, Gustavo Ribeiro Da Conceição, Paola Delatorre Rodrigues, G. B. Vidaurre
Eucalypt Physiological disorder (PD) is characterized by symptoms such as bark cracking, loss of apical dominance, adventitious shoot emission, leaf abscission, among others. The use of wood biomarkers easily measurable can contribute as a criterion for the selection of tolerant clones. The objective of this study was to evaluate the wood and bark properties of commercial Eucalyptus clones tolerant and susceptible to the PD and to identify profiles of wood and bark responses related to the disorder. Three trees per clone were sampled at 3 positions along the trunk: DBH (diameter at breast height), 50 and 75%. The wood properties evaluated were wood and bark density, heartwood, sapwood and bark percentages, and wood chemical composition (extractives, lignin, syringyl/guaiacil, holocellulose, and ash). Although there were different values of bark density between the clones and their PD susceptibility classification, the averages were statistically similar. Despite the difference of wood density and extractive content, there were no trends in relation to clone susceptibility or phenotype tolerance. In general, tolerant clones showed higher growth, aboveground biomass, heartwood percentage and syringyl/guaiacil ratio, and lower bark content. These characteristics are indicated as potential biomarkers related to physiological disorder tolerance.
{"title":"Propriedades da madeira como potenciais biomarcadores de tolerância a distúrbios fisiológicos: comparação de genótipos de eucalipto divergentes","authors":"M. Almeida, E. Picoli, Jordão Cabral Moulin, Lúcio M. S. Guimarães, Edval Angelo Valverde Zauza, Rodolfo Araújo Loos, Kevin Brown Hall, Danielly Silveira Gomes, Gustavo Ribeiro Da Conceição, Paola Delatorre Rodrigues, G. B. Vidaurre","doi":"10.18671/scifor.v50.22","DOIUrl":"https://doi.org/10.18671/scifor.v50.22","url":null,"abstract":"Eucalypt Physiological disorder (PD) is characterized by symptoms such as bark cracking, loss of apical dominance, adventitious shoot emission, leaf abscission, among others. The use of wood biomarkers easily measurable can contribute as a criterion for the selection of tolerant clones. The objective of this study was to evaluate the wood and bark properties of commercial Eucalyptus clones tolerant and susceptible to the PD and to identify profiles of wood and bark responses related to the disorder. Three trees per clone were sampled at 3 positions along the trunk: DBH (diameter at breast height), 50 and 75%. The wood properties evaluated were wood and bark density, heartwood, sapwood and bark percentages, and wood chemical composition (extractives, lignin, syringyl/guaiacil, holocellulose, and ash). Although there were different values of bark density between the clones and their PD susceptibility classification, the averages were statistically similar. Despite the difference of wood density and extractive content, there were no trends in relation to clone susceptibility or phenotype tolerance. In general, tolerant clones showed higher growth, aboveground biomass, heartwood percentage and syringyl/guaiacil ratio, and lower bark content. These characteristics are indicated as potential biomarkers related to physiological disorder tolerance.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"24 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87082565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Felipe Zuñe-da-Silva, P. Rodrigues, C. Rojas-Idrogo, G. E. Delgado-Paredes, A. Enrich-Prast, C. M. Sakuragui
Fires and habitat fragmentation are responsible for devastating large ecosystems around the biosphere. The increasing use of remote sensing allows fire patterns to be identified and plays an essential role in preventing fires. In this context, this study aimed to describe the variation in evidence of fire between the edge and the interior of an Atlantic Forest remnant in southeastern Brazil and infer its effects on vegetation. Fire records were acquired between 2010 and 2020 from the Instituto Nacional de Pesquisas Espaciais database and United States Geological Survey satellite images. For each scene, the images were processed and the normalized difference vegetation index (NDVI) was calculated. To assess the variation, records were classified and compared according to the year, month, hours, and habitat type (edge and interior). To verify the influence of fires on vegetation, simple linear regressions were performed based on the fire risk due to the NDVI-year-habitat interaction. The data included 748 fire records, with the highest occurrences from April to August, and 51% of the fires occurred between 15h and 20h, indicating periods with more intense solar radiation. The relationship between fire risk and NDVI-year-habitat was significant (F = 30.35; R 2 = 0.26; p < 0.0001), and the edges were more vulnerable to fire risk. This study shows that in an Atlantic Forest remnant, areas with lower vegetation indices, such as edges, are more vulnerable to fire than areas with dense forest vegetation. queimadas ocorreram entre 15h e 20h, indicando períodos de radiação solar mais intensa. A relação entre risco de fogo e NDVI-ano-habitat foi significativa (F = 30,35; R2 = 0,26; p < 0,0001), e as bordas, como esperado, foram mais vulneráveis ao risco de fogo. Este estudo mostra que em um remanescente de Mata Atlântica, áreas com índices de vegetação mais baixos, como bordas, são mais vulneráveis ao fogo do que áreas com vegetação florestal densa.
火灾和栖息地破碎化是破坏生物圈周围大型生态系统的原因。越来越多地使用遥感技术可以查明火灾类型，并在预防火灾方面发挥重要作用。在此背景下，本研究旨在描述巴西东南部大西洋森林遗迹边缘和内部火灾证据的变化，并推断其对植被的影响。2010年至2020年期间的火灾记录是从国家气象研究所数据库和美国地质调查局卫星图像中获得的。对每个场景的影像进行处理，计算归一化植被指数(NDVI)。根据年、月、时和生境类型(边缘和内部)对记录进行分类和比较。为了验证火灾对植被的影响，基于ndvi -年-生境相互作用的火灾风险进行了简单的线性回归。数据包括748起火灾记录，4月至8月发生次数最多，51%的火灾发生在15小时至20小时之间，这表明太阳辐射更强烈。火灾风险与NDVI-year-habitat之间的关系显著(F = 30.35;r2 = 0.26;P < 0.0001)，边缘更容易发生火灾。研究表明，在大西洋森林遗迹中，边缘等植被指数较低的地区比森林植被茂密的地区更容易发生火灾。Queimadas ocorreram centre 15h e 20h, indicando períodos de radia o solar maes intensity。相对而言，ndvi - no-habitat具有显著性(F = 30,35;R2 = 0,26;P < 0,0001)， e as bordas, como esperado, foram mais vulneráveis ao risco de fogo。Este estudo mostra que em em remanesente de Mata atltica， áreas com índices de vegeta o mais baixos, como bordas, s o mais vulneráveis ao fogo do que áreas com vegetao flower density。
{"title":"Influence of fire on edge vegetation in an Atlantic Forest remnant in Brazil","authors":"Felipe Zuñe-da-Silva, P. Rodrigues, C. Rojas-Idrogo, G. E. Delgado-Paredes, A. Enrich-Prast, C. M. Sakuragui","doi":"10.18671/scifor.v50.19","DOIUrl":"https://doi.org/10.18671/scifor.v50.19","url":null,"abstract":"Fires and habitat fragmentation are responsible for devastating large ecosystems around the biosphere. The increasing use of remote sensing allows fire patterns to be identified and plays an essential role in preventing fires. In this context, this study aimed to describe the variation in evidence of fire between the edge and the interior of an Atlantic Forest remnant in southeastern Brazil and infer its effects on vegetation. Fire records were acquired between 2010 and 2020 from the Instituto Nacional de Pesquisas Espaciais database and United States Geological Survey satellite images. For each scene, the images were processed and the normalized difference vegetation index (NDVI) was calculated. To assess the variation, records were classified and compared according to the year, month, hours, and habitat type (edge and interior). To verify the influence of fires on vegetation, simple linear regressions were performed based on the fire risk due to the NDVI-year-habitat interaction. The data included 748 fire records, with the highest occurrences from April to August, and 51% of the fires occurred between 15h and 20h, indicating periods with more intense solar radiation. The relationship between fire risk and NDVI-year-habitat was significant (F = 30.35; R 2 = 0.26; p < 0.0001), and the edges were more vulnerable to fire risk. This study shows that in an Atlantic Forest remnant, areas with lower vegetation indices, such as edges, are more vulnerable to fire than areas with dense forest vegetation. queimadas ocorreram entre 15h e 20h, indicando períodos de radiação solar mais intensa. A relação entre risco de fogo e NDVI-ano-habitat foi significativa (F = 30,35; R2 = 0,26; p < 0,0001), e as bordas, como esperado, foram mais vulneráveis ao risco de fogo. Este estudo mostra que em um remanescente de Mata Atlântica, áreas com índices de vegetação mais baixos, como bordas, são mais vulneráveis ao fogo do que áreas com vegetação florestal densa.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"43 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81194316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bruno H. Gomes, Mariana G. Mendes, M. V. Faria, A. Bonetti, A. Nogueira
The aim of this research was to evaluate genetic diversity among genotypes of “pequi”, Caryocar brasiliense, producing fruits with and without thorns in the endocarp, which is one the biometric characteristics of the fruits. The variance components associated with the effects of the model and estimates of the proportions of the total phenotypic variation were estimated due to the difference between groups, the difference between genotypes within each group, the difference between fruits within genotypes and within of groups. The genetic diversity within each group was verified, mainly in the group of plants producing fruit without thorns. In this study, H2 varied from 0.0 to 88.40% in the group of fruits with thorns and from 0.0 to 96.32% in the group of fruits without thorns. Biometric evaluations demonstrate that the genotypes studied presented statistically significant differences; which shows that the population has a high genetic potential for germplasm conservation and breeding.
{"title":"Genetic diversity of Caryocar brasiliense Cambess. (Caryocaraceae: Malpighiales) among genotypes producing fruits with and without thorns in the endocarp","authors":"Bruno H. Gomes, Mariana G. Mendes, M. V. Faria, A. Bonetti, A. Nogueira","doi":"10.18671/scifor.v50.08","DOIUrl":"https://doi.org/10.18671/scifor.v50.08","url":null,"abstract":"The aim of this research was to evaluate genetic diversity among genotypes of “pequi”, Caryocar brasiliense, producing fruits with and without thorns in the endocarp, which is one the biometric characteristics of the fruits. The variance components associated with the effects of the model and estimates of the proportions of the total phenotypic variation were estimated due to the difference between groups, the difference between genotypes within each group, the difference between fruits within genotypes and within of groups. The genetic diversity within each group was verified, mainly in the group of plants producing fruit without thorns. In this study, H2 varied from 0.0 to 88.40% in the group of fruits with thorns and from 0.0 to 96.32% in the group of fruits without thorns. Biometric evaluations demonstrate that the genotypes studied presented statistically significant differences; which shows that the population has a high genetic potential for germplasm conservation and breeding.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"48 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85598286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study aimed to explain the association between macroand micro-nutrients with vegetation indices and to determine the most important wavelengths for each nutrient. In addition, equations capable of describing the nutritional status of Eucalyptus saligna Smith stands based on spectral radiometric data were suggested. The research was carried out in an 18-month-old plantation located in Barra do Ribeiro, Rio Grande do Sul State, Brazil. For the reflectance measurement 12 samples were used, which also served for the chemical quantification of macro and micronutrients. Nutrients were estimated by using multiple linear regression. The results showed that the visible and red-edge regions are more sensitive for discriminating nutrients in plants, mainly Mn, P, Ca, and S. In the macronutrient modeling, the estimation of N, Ca, and S, yielded the best adjustments, while in the micronutrient group the best adjustments were yielded by Zn, Cu, and Mn. Thus, the present study demonstrated the effectiveness of spectral radiometry to analyze nutrients in vegetation, which can be used in a fast and practical way to diagnose the nutritional status of eucalyptus.
本研究旨在解释大、微量营养素与植被指数之间的关系，并确定每种营养素的最重要波长。此外，还提出了基于光谱辐射数据的描述盐叶桉林分营养状况的方程。该研究是在巴西南里奥格兰德州Barra do Ribeiro的一个18个月大的种植园进行的。反射率测量用了12个样品，同时也用于常量和微量元素的化学定量。利用多元线性回归估计营养成分。结果表明，可见区和红边区对植物中主要以Mn、P、Ca和S为主的营养元素判别更为敏感。在宏量元素模型中，N、Ca和S的估算调节效果最好，而在微量元素组中，Zn、Cu和Mn的估算调节效果最好。因此，本研究证明了光谱辐射法分析植被营养成分的有效性，可以快速实用地诊断桉树的营养状况。
{"title":"Índices de vegetação para análise nutricional de Eucalyptus saligna Smith usando espectrorradiometria","authors":"Letícia Daiane Pedrali, Juliana Marchesan, Túlio Barroso Queiroz, Elisiane Alba, Rudiney Soares Pereira, Mauro Valdir Schumacher","doi":"10.18671/scifor.v50.06","DOIUrl":"https://doi.org/10.18671/scifor.v50.06","url":null,"abstract":"This study aimed to explain the association between macroand micro-nutrients with vegetation indices and to determine the most important wavelengths for each nutrient. In addition, equations capable of describing the nutritional status of Eucalyptus saligna Smith stands based on spectral radiometric data were suggested. The research was carried out in an 18-month-old plantation located in Barra do Ribeiro, Rio Grande do Sul State, Brazil. For the reflectance measurement 12 samples were used, which also served for the chemical quantification of macro and micronutrients. Nutrients were estimated by using multiple linear regression. The results showed that the visible and red-edge regions are more sensitive for discriminating nutrients in plants, mainly Mn, P, Ca, and S. In the macronutrient modeling, the estimation of N, Ca, and S, yielded the best adjustments, while in the micronutrient group the best adjustments were yielded by Zn, Cu, and Mn. Thus, the present study demonstrated the effectiveness of spectral radiometry to analyze nutrients in vegetation, which can be used in a fast and practical way to diagnose the nutritional status of eucalyptus.","PeriodicalId":54443,"journal":{"name":"Scientia Forestalis","volume":"6 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89417211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","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：