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Navegando EA - Artigos publicados em periódicos por Autor "Abreu, Camila Meira de"
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Item Escarificação e ácido giberélico na emergência e crescimento de plântulas de biribá(2015-10) Campos, Luiz Fernandes Cardoso; Abreu, Camila Meira de; Guimarães, Ricardo Neves; Seleguini, AlexsanderIn Annonaceae seed germination there inhibitory substances that cause dormancy, which together with a tough seed coat and antagonistic factors provide the rapid and uniform germination. The objective of this research was to study the effect of mechanical scarification and seed soaking in gibberellic acid on emergence and early growth of Biribá plantlets. The experiment was conducted in the Horticulture Sector of the School of Agronomy, Universidade Federal de Goiás (EA/UFG), Goiânia, GO. The seeds used in the test were manually extracted from fruits harvested in the municipality of Itapuranga, GO. Treatments included a combination of factors scarification (seeds scarified mechanically or not) and seed soaking for 20 hours with increasing concentrations of gibberellic acid (0, 125, 250, 500 and 1000mg L -1 ) in experimental design of randomized blocks. The characteristics evaluated were the percentage and emergency speed index of plantlets at 24, 34 and 43 days after sowing, the length of the main root and aerial part, dry weight of root, shoot and total of plantlets. The mechanical scarification in Biribá seeds promotes higher percentage and of plantlets emergence speed index. Increased concentrations of gibberellic acid linearly increase the percentage and the emergency speed index and the length of the main root and shoots of plantlets. Allowing more rapid emergence and consequently saving time in the production of seedlings, it is recommended scarification of biribá seeds.Item Plantas de cobertura do solo em área de videira rústica cultivada no cerrado goiano(2015-06) Campos, Luiz Fernandes Cardoso; Abreu, Camila Meira de; Collier, Leonardo Santos; Seleguini, AlexsanderThe use of cover crops is an important tool for maintaining and restoring the chemical and physical properties of the soil; however, there is little information on the use of these plants in vine planting. The objective of this study was to evaluate the development and the rate of decomposition of plant ground cover in vine planting. The experiment consisted of six treatments established in a randomized block design in a 3 × 2 factorial scheme with five repetitions. The first factor consisted of plant species cover crops: bean‐to-pig (Canavalia ensiformis L. DC), lab-lab (Dolichos lab lab L.) and spontaneous plants. The second factor comprised two vine pruning periods based on the seeding of cover crops, that is, the first vine pruning was performed 25 days after the sowing of the cover crop, and the second pruning was conducted 55 days after sowing. Vine pruning times do not influence the soil cover rate and biomass production of the cover crop. Bean-to-pig is suitable for intercropping with vine. The dynamics of decomposition is faster for plants in the vegetative stage and it varies according to the season.