TCC - Engenharia Florestal (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/436
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Resultados da Pesquisa
Item Restrição hídrica e fertilização fosfatada no crescimento de mudas de Tabebuia aurea (Silva Manso) Benth. & Hook.f ex S. Moore sob diferentes regimes de irrigação(2023-09-20) Pereira Neto, Cláudio Clementino; Freitas, Eliane Cristina Sampaio de; http://lattes.cnpq.br/7525975084334972; http://lattes.cnpq.br/5841590477669007The availability of water in the soil is one of the most important factors influencing the successful establishment of saplings in field conditions. The scarcity of this resource serves as a constraining element that hampers both productivity and the prosperous cultivation of forest crops. Implementing applications of phosphate fertilizer can play a pivotal role in fostering the development of a more robust root system, thereby potentially mitigating the adverse impacts stemming from inadequate water availability on the cultivation. Investigations dedicated to silviculture pertaining to native forest species remain relatively scarce, primarily due to a concentration of research efforts around commercially more prevalent species. With the aim of evaluating tolerance and growth, as well as morphophysiological alterations in seedlings of Tabebuia aurea (Silva Manso) Benth. & Hook.f ex S. Moore subjected to water deficit and phosphate fertilization; an experiment was conducted at the greenhouse of the Department of Forestry Science at UFRPE – SEDE. Three irrigation cycles: daily (T); every 5 days (S5); and every 10 days (S10), and 4 phosphorus addition treatments (0, 100, 200, and 300 mg dm-³ of P) were tested following a factorial scheme in a completely randomized design, with 5 replicates. The source of P employed was monosodium phosphate (NaH2PO4). Two seeds were placed per 50 cm³ tubes, and thinning was conducted post germination. Following germination and growth, seedlings were standardized based on height and transplanted into 2,8 dm³ pots containing subsoil substrate. Water deficit induction was conducet after transplantation and phosphorus treatments differenciation. Throughout the experiment, seedling measurements were taken every ten days, encompassing parameters such as height (H) and stem diameter (DC). At the conclusion of the trial, the following aspects were determined: shoot dry matter (MSA), root dry matter (MSR), total dry matter (MST), shoot-to-root dry matter ratio (MSA/MSR), and Dickson's Quality Index (IQD) were calculated. Additionally, H, DC, NF, leaf area, primary root length, and chlorophyll content were determined. The application of phosphorus doses did not act as a mitigating factor for the effects of water stress. Seedlings with better quality were obtained in the treatment with daily irrigation, and the dose that yielded the best responses for the production of T. aurea seedlings was 200 mg dm-3.Item Potencial fitorremediador de Erythrina velutina Willd. cultivada em solo contaminado com cobre e incorporação de biocarvão(2022-10-04) Pundrich, Maria Gabriella Rodrigues; Freitas, Eliane Cristina Sampaio de; http://lattes.cnpq.br/7525975084334972; http://lattes.cnpq.br/2323613741603823In recent decades, researches have been demonstrating how heavy metals have the ability to stick and accumulate in the environment, being harmful to human health and the environment. Once the contamination of the soil happens, some actions are needed for the soil’s remediation.The objective of this reasearch was to evaluate the growth of the Erythrina velutina Willd seedlings cultivated in contaminated soil with copper and biochar. The first experiment was conducted for 21 days and the second for 69 days and analyzed the following morphological variables: Aerial Part Height (APH), Stem Diameter (SD), Aerial Part Increment (API) Stem Diameter Increment (SDI), Root’s Length (RL), Aerial Part Dry Mass (APDM), Root Dry mass (RDM), Total Dry Mass (TDM), Ratio between Aerial Part and Stem Diameter (AP/SD), Leaflet Numbers (LN), Leaflets Area (LA), Dickson Quality’s Index (DQI), Translocation Index (TI), Water Content in Aerial Part and Root (WCAPT) and Copper Concentrations in plant’s tissue (aerial and root part) through the EDS (energy dispersive spectroscopy).The collected data were submitted to a variance analysis (ANOVA) (p < 0,05) and Tukey test (p < 0,05). In the first experiment, it was observed that the biochar didn’t reveal any positive effect and didn’t benefit the growth of the seedlings. This result can be explained by the characteristics of biochar, influenced by the raw material and the carbonization process. In addition, the biochar could also have increased the cation exchange capacity and, consequentially, decreased Copper leach, enabling it to be more available to the seedlings. As for the second experiment, there was no significant difference of the 5% morphological variable of the seedlings, but it didn’t have Copper in the tissues analyzed, which could mean that the plant didn’t absolve as a result to a possible leach and/or an adsorption of the feedstock. Therefore, it is necessary complementary researches to evaluate the potential of Erythrina velutina Willd in projects of phytoremediation in soils contaminated by Copper.Item Dosagens de adubação de cobertura na produtividade inicial e sobrevivência de eucalipto em Pernambuco(2021-07-15) Lima, Maria Clara Bezerra; Hakamada, Rodrigo Eiji; http://lattes.cnpq.br/4186459700983170; http://lattes.cnpq.br/3820429357793743Energy generation from biomass coming from planted forests, in addition to being a sustainable energy source, is an opportunity to create a viable alternative to the demand for biomass from wood in the state. Considering the edaphoclimatic characteristics of the region, the scarcity of studies on the subject and the importance of fertilization, as one of the silvicultural practices that provides greater gains in wood productivity, this experiment aims to evaluate the silvicultural behavior of eucalyptus clones in an area of transition between Zona da Mata and Agreste Pernambucano, in relation to growth and yield when subjected to different doses of top dressing. The research was carried out in a clonal eucalyptus plantation, implemented in 2018, in the municipality of Glória do Goitá, on a farm leased to the company BRF. The experiment with different doses of topdressing fertilization (NPK) and the addition of foliar boron applied when the stand was 15 months old was initially carried out with measurements of DBH and tree height in 32 plots with 8 treatments and 4 replications. The first measurement was carried out 15 months after planting and the second after 24 months after planting, to assess which dosage of top-dressing results in better indicators of productivity and survival. Through regression obtained through destructive sampling of biomass, individual volumes were estimated using the Schumacher & Hall equation. The volume was extrapolated to the total area (m³/ha) and the indicators of productivity average annual increment (IMA) and current annual increment (ICA) between the two measurements were estimated. The volume per treatment of the plots in the first measurement was 7.2 m3/ha and in the second measurement 16.3 m3/ha, and the IMA respectively 5.77 m3/ha/year and 8.16 m3/ha/year, resulting in a Current Annual Increment (ICA) of 10.92 m3/ha/year. The results at 24 months of planting show the relative gain in productivity was 28% to 58%, with the maximum gain for the dosage of treatment 8 (250% of the usual dose adopted by the company, 535kg/ha). In statistical analysis by regression, we obtained a significance level of 5% for boron-free fertilization, when we correlated the ICA with the fertilizer dosages, showing that there is a trend of growth from a statistical point of view. The experiment will continue to be analyzed in the coming years and new fertilization with fertilizer and foliar boron will be carried out, to verify if the productivity gain keeps increasing and if the mortality rates remain low.