10 documents found, page 1 of 1
Methods for overcoming seed dormancy of Schizolobium parahyba var. Amazonicum
Dionisio, Luiz Fernandes Silva; Soares, Fabiano Lago; Milhomem, Camila de Almeida; Rodrigues, Richard Pinheiro; Lozano-Bardales, Ricardo ManuelSchizolobium parahyba var. amazonicum is a tree species of great commercial interest, however, its seeds present tegumentary dormancy. Thus, the objective of this work was to evaluate the efficiency of different scarification methods to suppress seeds dormancy of S. parahyba. The treatments consisted in the following scarification methods: Grain 400 mechanical sandpaper (Sandpaper); Water at 100°C for 1 minute ...
Seedling quality of Agonandra brasiliensis in response to different Osmocote® d...
Mota, Eduardo Rodrigues; Smiderle, Oscar José; Dionisio, Luiz Fernandes Silva; Souza, Aline das Graças; Montenegro, Raiovane Araújo; Schwartz, GustavoThe objective of this work was to evaluate seedlings quality of the tree species Agonandra brasiliensis under different doses of the controlled release fertilizer (CRF) Osmocote® and recipient volumes. The experiment was set up in a factorial design for two recipient volumes (1.8 L and 2.2 L) and five CRF doses (0.0; 0.5; 1.0; 2.0; and 3.0 g L-1 of substrate). Four repetitions of one plant each were used. After...
Anthropogenic disturbances stimulate natural regeneration of Euxylophora paraen...
Duarte, Joyce Ananda Paixão; Silva, José Natalino Macedo; Pires, Jakeline Prata de Assis; Ferreira, Gracialda Costa; Dionisio, Luiz Fernandes SilvaIn the Brazilian Amazon, forest fragments increase annually leading many species to local extinction. Euxylophora paraensis Huber is an endemic species whose natural habitat is restricted to the north of Brazil. The natural regeneration was evaluated using 10 circular plots of land each with a radius of 20 meters. The density of regenerating individuals at the edge and the interior of the fragment and the behav...
Influence of seed heteromorphy on morphometry, germination, vigor and morpholog...
Duarte, Joyce Ananda Paixão; Dionisio, Luiz Fernandes Silva; Furtado, Gabriele do Nascimento; Silva, Etiane de SouzaParahancornia fasciculata (Poir) Benoist, popularly known as ‘amapá amargoso’, is an important species in popular and pharmacological medicine due to the latex of its trunk, called ‘leite do amapá’. However, studies on seed technology of this species are still incipient. The objective of this work was to evaluate the influence of the tegument color (heteromorphism) on the morphometry, germination, seed vigor an...
Aerial entomofauna in Eucalyptus spp. in Southeast Pará, Brazil
Saliba, Ivy Laura; Lunz, Alexandre Mehl; Batista, Telma Fátima Vieira; Dionisio, Luiz Fernandes Silva; Machado, Helton Bastos; Schwartz, GustavoHomogeneous forest plantations are commonly attacked by biotic agents due to their lower biological diversity. This type of planting, especially of eucalyptus, was intensified in Southeast of the state of Pará, Brazil, from the 1990s onwards. Thus, the objective of this study was to prospect the diversity of aerial entomofauna, evaluate their responses to seasonality, and detect the occurrence of possible impor...
Distribuição espacial de Rhynchophorus palmarus (L.) (Coleoptera: Curculionidae...
Dionisio, Luiz Fernandes SilvaThe Oil Palm (Elaeis guineensis Jacq.) is a palm tree of African origin, typical of tropical regions, and, in Brazil, the largest areas of palm cultivation are found in Amazonia. The objective of the present work is was to evaluate the pattern of spatial distribution of the Rhynchophorus palmarum and Metamasius hemipterus on palm plantations in the South of the State of Roraima. The experimental area is located...
Characterization of fruits and seeds of Astrocaryum aculeatum G. Mey. in the no...
Dionisio, Luiz Fernandes Silva; Smiderle, Oscar José; Gomes, Jefferson Peixoto; Santos, Raylanne de Lima; Leão, Fabio MirandaTucumã (Astrocaryum aculeatum G. Meyer) is an oil palm tree with great economic potential. The oil of its pulp and seed of its fruits are used for the production of biofuels in Brazil, and the fruit characterization in natural populations is required to obtain important information for the genetic improvement of this species. The objective was to evaluate physical characteristics of A. aculeatum fruits and seed...
Monitoramento de insetos e distribuição espacial de Sitophilus spp. (Coleoptera...
Dionisio, Luiz Fernandes Silva; Silva Lima, Antonio Cesar; Izidório, Richarles Martins; dos Santos, Artur Vinícius Ferreira; Orrillo, Hipolito MurgaO objetivo deste trabalho foi identificar as principais espécies de insetos de grãos armazenados, bem como determinar o padrão de distribuição espacial de Sitophilus spp. em estrutura de beneficiamento e armazenamento de grãos. O estudo foi realizado em uma unidade de armazenamento e beneficiamento de grãos no município de Boa Vista/RR, onde foram realizadas 20 amostragens no período de julho de 2013 a maio de ...
Importância fitossociológica de um fragmento de floresta ombrófila densa no est...
Dionisio, Luiz Fernandes Silva; Filho, Osmar Serra Bonfim; Crivelli, Bruno Roberto de Souza; Gomes, Jefferson PeixotoObjetivou-se com o presente trabalho caracterizar a fitossociologia de um fragmento de floresta nativa no município de Caroebe/RR, Brasil. Foram inventariadas todas as árvores com DAP ≥ 15 cm, em 18 parcelas permanentes de 15 x 20 m (300 m²). Foram identificados 175 indivíduos, distribuídos em 17 famílias botânicas, 37 gêneros e 45 espécies. Os gêneros com maior riqueza florística foram Protium, Vantanea e Cour...
EFEITOS DE GRADIENTES AMBIENTAIS NA FITOSSOCIOLOGIA DE ASSEMBLEIAS DE PALMEIRAS...
Gomes, Jefferson Peixoto; Condé, Tiago Monteiro; Santos, Raylanne de Lima; Dionisio, Luiz Fernandes Silva; Duarte, Otoniel RibeiroA variação de altitude e a proximidade de corpos hídricos influenciam a composição e estrutura de assembleias de palmeiras na Amazônia. O presente estudo teve como objetivo compreender os efeitos desses gradientes ambientais na composição florística e estrutura das assembleias de palmeiras arbóreas nos municípios de São João da Baliza (A1) e Caroebe (A2), em Roraima. Foram mensuradas as palmeiras com estipe aér...