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| Registros recuperados: 587 | |
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| Menon, Talita Aperibense; Carvalho, Fabricio Alvim. |
| Plants of the genus Pinus are known worldwide by biological invasion potential. In the 1960s there were massive plantations of Pinus elliottii in the Campus of Juiz de Fora University, and nowadays the species is widespread. This study analyzed the species population structure in two distinct forest regeneration environments: open area (abandoned pasture) and closed-canopy (secondary forest) on the campus of UFJF, Juiz de Fora, MG, Brazil. The hypothesis were that the open environment would present a better structured population, due to the preference of species for open areas. Random plots were allocated (15 plots of 5 m x 5 m in each environment), and all individuals of the species (trees: dbh . 5 cm, saplings, dbh <5 cm and H . 1 m and seedlings: H... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Biological invasion; Exotic plants Recursos florestais; Ecologia florestal Floresta Atlântica; Invasão biológica; Plantas exóticas. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/348 |
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| Martins, Emerson Gonçalves; Neves, Edinelson José Maciel; Sturion, José Alfredo; Aoki, Hideyo. |
| Twenty and twenty three seed provenances of Grevillea robusta A. Cunn. were imported from Australia, in 1993 and 1994, respectively, by Embrapa Florestas. This genetic germoplasm was utilized for starting a breeding program in the states of Paraná, São Paulo and Mato Grosso do Sul. In 2002, twenty eight genotypes were selected in the Presidente Castelo Branco-PR district whose seeds were utilized for the installing second generation progenies test in Avaré-SP. Randomized blocks was the statistical design utilized, with linear plots of five plants, adjusted in a compass 3m x 3m, with 8 replications. Total height, DBH (diameter at the height of breast) were the characteristics considered in the volume evaluations. Estimation of variance components, genetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grevillea robusta; Grevílea; Seed orchard; Provenances; Progenies; Brazil. Grevillea robusta; Grevílea; Pomar de sementes; Procedências; Progênies.. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/217 |
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| Campos, Bráulio Pizziolo Furtado; Silva, Gilson Fernandes da; Binoti, Daniel Henrique Breda; Mendonça, Adriano Ribeiro de; Leite, Helio Garcia. |
| O objetivo deste trabalho foi analisar a capacidade de uma rede neural artificial (RNA) em estimar a altura total de árvores de duas espécies em diferentes condições de crescimento. Para fins de comparação, também foi ajustado o modelo hipsométrico de Campos, aplicado por estrato, conforme o gênero, espécie, rotação, espaçamento e classe de idade das árvores. A avaliação das redes neurais artificiais e do modelo de Campos foi realizada com base no coeficiente de correlação entre as alturas observadas e estimadas, a raiz quadrada do erro quadrático médio percentual e de análises gráficas. Observou-se que a altura de árvores de diferentes espécies, em distintas condições de crescimento e locais, pode ser estimada utilizando uma única rede neural, com a mesma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inventário florestal; Modelos hipsométricos; Estatística Relação hipsométrica; Inventário florestal; Floresta de produção Hypsometric relation; Forest inventories; Commercial forestry. |
| Ano: 2016 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1166 |
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| Freire, Antonio Lucineudo Oliveira; Miranda, José Romilson Paes de. |
| Com o objetivo de avaliar os efeitos da salinidade no crescimento e acúmulo de massa seca e cátions em plantas jovens de moringa (Moringa oleifera), testaram-se quatro tipos de solos, nas condutividades elétricas (C.E.) 0,49 (controle), 4,15, 6,33 e 10,45 dS m-1. O experimento foi conduzido em delineamento inteiramente casualizado, com quatro repetições. As plantas cresceram inicialmente em tubetes rígidos e, aos 30 dias após a emergência, foram transferidas para vasos contendo 10 kg de solo, de acordo com o tratamento de salinidade. A salinidade prejudica o crescimento inicial das plantas e acúmulo de cátions na parte aérea e nas raízes das plantas. Na fase inicial de crescimento, as plantas de moringa não inibem a absorção de Na e sua translocação para a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moringa oleifera; Estresse salino; Tolerância à salinidade Moringa oleifera; Salt stress; Salt tolerance. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/315 |
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| Pelissari, Allan Libanio; Caldeira, Sidney Fernando; Santos, Vanderley Severino dos; Santos, Joilson Onofre Pereira dos. |
| The objective of this study was to investigate the spatial correlations of soil chemical attributes with the development of teak (Tectona grandis) in the city of Nossa Senhora do Livramento, Mato Grosso State, Brazil. It was allocated 46 permanent plots of 15 m x 30 m. From the stand it was obtained the mean annual values of diameter at 1.3 m above the ground and total height of second to ninth years of age. Soil samples from 0 to 0.20 m depth were also obtained at the second year, to determine pH, calcium, magnesium and aluminum, phosphorus and potassium for subsequent modeling of spatial patterns by geostatistics. The diameter at 1.3 m and the total height of teak present higher spatial correlation with the chemical soil attributes pH and calcium, low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tectona grandis Spatial variability Geoestatistic Kriging Recursos Florestais; Engenharia Florestal; Silvicultura; Geociências Tectona grandis Variabilidade espacial Geoestatística Krigagem. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/367 |
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| Lima, Rosival Barros de Andrade; Silva, José Antônio Aleixo da; Marangon, Luiz Carlos; Ferreira, Rinaldo Luiz Caraciolo; Silva, Roseane Karla Soares da. |
| O presente trabalho foi realizado em um trecho de Floresta Ombrofila Densa de Terras Baixas no Municipio de Carauari, Amazonas, tendo como objetivo estimar a composicao floristica do estrato arboreo e classificar as especies nos respectivos grupos ecologicos, a fim de se obter informacoes sobre a atual situacao do fragmento florestal, para embasar estrategias de conservacao e preservacao, bem como embasar a formulacao de pesquisas que visem a disseminacao do conhecimento e sua aplicacao na producao sustentavel. O inventario florestal foi realizado em uma area de 275 ha, cortada por tres transectos (822 m, 1.265 m e 2.349 m), totalizando 4.436 m. Foram instaladas parcelas de 20 m x 25 m, equidistantes a cada 50 m e intercaladas a direita e a esquerda da... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Floristic; Ecological groups Amazônia; Florística Grupos; Ecológicos. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/261 |
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| Santana, Dalva Luiz de Queiroz; Auer, Celso Garcia; Rocha, Ana Lucia Jarretta Loyola; Marques, Elaine. |
| Alguns ipês (Tabebuia alba, T. chrysotricha e T. heptaphylla) apresentam folhas jovens deformadas, na forma de enrolamento foliar, em viveiros e na arborização urbana. Uma avaliação foi feita em plantas destas espécies, com idade variando entre 1 mês e 3 anos, no Viveiro Municipal da Barreirinha e em árvores da arborização urbana da cidade de Curitiba, PR. Coletaram-se galhos apicais com sintomas, em cada planta, para a identificação dos insetos associados. Foram encontrados, associados às folhas deformadas, insetos pertencentes às ordens Coleoptera, Hymenoptera, Hemiptera e Diptera. No entanto, foi constatado que o enrolamento do lombo foliar do ipê é provocado por Trioza tabebuiae (Hemiptera: Psylloidea). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ipê-amarelo; Folha; Praga Trumpet tree; Leaf; Pest. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/245 |
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| Arnhold, Alexandre; Magistrali, Iris Cristiane; Anjos, Norivaldo dos. |
| This study aimed to enlarge the records of forest species attacked by leaf cutting ants in Viçosa, in the state of Minas Gerais. The rising was accomplished in the Campus of the Universidade Federal de Viçosa, being considered only nest active that were cutting and carrying fragments of forest essences. For the study it was evaluated temperature measures and distances of the nest to the attacked tree. As results are observed the occurrence of three quenquém species (Acromyrmex niger Smith, F., 1858, Acromyrmex subterraneus molestans Santschi, 1925 and Acromyrmex subterraneus subterraneus Forel, 1893) and two saúva species (Atta sexdens rubropilosa Forel, 1908 and A. laevigata F. Smith, 1858) attacking 14 forest species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest entomology; Nests; Diel patterns of foraging Recursos Florestais; Engenharia Florestal Entomologia florestal; Ninhos; Ritmo diário de forrageamento. |
| Ano: 2013 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/377 |
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| Rego, Gizelda Maia; Possamai, Edilberto. |
| The paper objective was to describe and to illustrate the external and internal morphologic aspects of the seed, the germination process external aspects and seedlings phases of jacarandá- da- bahia (Dalbergia nigra VELLOZO) Fr. All. Ex. Bentham Leguminoseae- Papilionoidae). It was found that seed have tegument of bright medium brown color, with kidney shape and symmetricaless form of 7,0 mm to 10,0 mm of length for 5,9 mm to 8,8 mm of width; germination epigeous phanerocotylar, free of tegument, and occur at 30 days after sowing. Seedlings with opposing follicles, of herbaceous consistency and green clear color, with about 1,2 cm of length for 0,8 cm of width. Observations on the seeds internal and external morphology, allied to the ones made on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dalbergia nigra; Native species; Brazil Dalbergia nigra; Espécie nativa. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/219 |
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| Araújo, Emanuel José Gomes de; Pelissari, Allan Libanio; David, Hassan Camil; Scolforo, José Roberto Soares; Netto, Sylvio Péllico; Morais, Vinícius Augusto. |
| The objective of this work was to adjust traditional models of hypsometric relations for homogeneous candeia stands, under different initial spacings. Ten models were adjusted for hypsometric relations. The assessment criteria obeyed the highest determination coefficient and the lowest standard error of estimate in percentage. The F test was also evaluated, as well as the significance of the regression coefficients, the graphical analysis of the residues and the identity test when the same model was selected for different treatments. It was observed that, over time, the hypsometric curves reduce their tilt, move to the right and elevate, reducing the interval among them from the sixth year. The traditional hypsometric relation models as Henricksen,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hypsometric models Height/diameter relation Identity of models Recursos Florestais; Engenharia Florestal Modelos hipsométricos Relação altura/diâmetro Identidade de modelos. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/397 |
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| Martinez, Diego Tyszka; Resende, Marcos Deon Vilela de; Higa, Antonio Rioyei; Costa, Reginaldo Brito da. |
| The aim of this study was to compare, through simulation, the BLUP and BLUP-HET procedures for breeding values prediction under heterogeneity of residual variances. Random data were generated with spread sheet, considering a variance of 0,10 and variable residual variance, by number of clones, in order toprovide heterogeneity of variances. Actual and residual breeding values obtained were added to the mean 10, in order to obtain positive phenotypic values. Experimental design was random blocks with 100 genotypes, one plant per plot and 2, 5, 10 and 20 repetitions. Data were evaluated using Selegen software, obtaining estimated breeding values through BLUP and BLUP-HET procedures which were compared to actualbreeding values. In this study, using two and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modelos lineares mistos; Parâmetros genéticos; Ganho com seleção Mixed linear models; Genetic parameters; Selection gain. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/249 |
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| Gadelha, Fernando Henrique de Lima; Aleixo da Silva, José Antônio; Caraciolo Ferreira, Rinaldo Luiz; dos Santos, Rubeni Cunha; Tavares, José Alves. |
| The region of the Araripe Gypsum Pole in the state of Pernambuco is the largest producer of plaster in Brazil, and its main energy source for producing plaster is the wood from Caatinga, which provides not enough wood for the demand of gypsum industries, resulting in deforestation and compromising the sustainability of the region. One option to supply that demand is the implementation of fast growing forests. This study aimed to evaluate the volumetric growth of three clones of Eucalyptus spp., conducted under the regimes of high forest and coppice, planted with a spacing of 3x2 m. The experiment was carried out at the Experimental Station of the Agronomic Institute of Pernambuco, in Araripina, PE, Brazil. Height and circumference at 1.30 m above soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gypsum Pole; Eucalyptus sp; Energy Forests Recursos Florestais Silvicultura Manejo Florestal Pólo Gesseiro do Araripe; Eucalyptus; Floresta energética. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/827 |
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| Registros recuperados: 587 | |
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