http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4355 Sat, 11 Apr 2026 13:28:04 GMT 2026-04-11T13:28:04Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9777 Título: Crescimento de mudas de Erythrina velutina Willd. sob fertilização potássica na fase de rustificação e restrição hídrica Autor: PUNDRICH, Maria Gabriella Rodrigues Primeiro orientador: FREITAS, Eliane Cristina Sampaio de Abstract: Water is a vital resource for the development of all living beings, especially plants, and is essential for physiological processes such as photosynthesis and nutrient absorption. Currently, low water availability is a common problem worldwide, and this situation has worsened with climate change, limiting the establishment of forest species. Applications of potassium fertilizer can reduce the impact of water deficit on the initial growth of seedlings, increasing their efficiency in water use. In this context, the objective of this study was to evaluate whether the application of potassium fertilizer during the rust phase reduces the stress caused by water deficit in Erythrina velutina Willd. seedlings. The experiment was conducted in a greenhouse at the Forest Nursery of the Federal Rural University of Pernambuco (UFRPE). The experiment was carried out in a completely randomized design (CRD), in a 4 x 3 factorial (4 K rates: 0, 100, 200 and 300 mg dm-³) and 3 types of daily irrigation (ID - daily application, I7 - application every 7 days and I14 - application every 14 days). Sowing was carried out in 288 cm³ tubes, and after 15 and 30 days after sowing, topdressing fertilization with macro and micronutrients was performed. When the seedlings reached 15 cm in height, a rust fertilization was performed with K rates, divided into 3 applications, every 7 days. After 15 days of the last potassium fertilization of rust, the seedlings were transplanted to 5 L pots. At 111 days after sowing (DAS), another potassium fertilization was performed divided into 3 applications, every 7 days. After 15 days of the last application, changes were imposed on the water conditions according to the safety treatments. The following morphological variables were verified: height increase (IP), stem diameter increase (IDC), number of leaflets, dry matter mass of the aerial part (MSPA), root (MSR) and total (MST), main root length (CRP), leaf area (AF), dry matter ratio of the aerial part/root (MSPA/MSR), Dickson quality index (IQD) and stomatal density; physiological results: chlorophyll indices, relative water content (TRA) and damage to cell membranes; and biochemical variables: chlorophyll and carotenoid content, hydrogen peroxide (H2O2) concentration, malondialdehyde and K content in the leaves. The data obtained were subjected to analysis of variance (ANOVA), test of means, regression analysis at 5% significance, and principal component analysis (PCA). The ideal transparency for the growth of changes is daily productivity, since there was a reduction in growth and dry matter production when water was limited. Potassium fertilization did not influence height growth, but increased root length, leaf area, chlorophyll content, cell damage and hydrogen peroxide content. The application of a dose of 200 mg dm-³ of potassium is indicated to improve photosynthetic capacity, carotenoid content, reduction of oxidative stress and greater leaf area, which may influence greater tolerance to water stress in E. velutina seedlings. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação Thu, 27 Feb 2025 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9777 2025-02-27T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8957 Título: Ciclagem de nutrientes em fragmento de floresta ombrófila densa das terras baixas, na Zona da Mata de Pernambuco Autor: MORAIS, Yasmim Yathiara Gomes Araújo Primeiro orientador: FREIRE, Fernando José Abstract: The Atlantic Forest, considered the second largest rainforest on the American continent, exert an important role in ecological balance, although the anthropic actions cause a loss and fragmentation of this biome. As a result of these high anthropic actions, litter and outflow from the trunk accrue from rainfall, have become essential sources of nutrients for the ecosystem. In view of the lack of information on this theme, this work aimed to evaluate the dynamics of nutrient cycling through leaf biomass, litter supply and runoff through the trunk in a fragment of Dense Ombrophilic Forest of the Lowlands, in the Zona da Mata of Pernambuco. Data collection was carried out in a forest fragment located in Sirinhaém, Pernambuco. Based on a phytosociological survey carried out in the area, the nine species with the highest absolute density in the fragment were determined. Three individuals of each species were selected and 25 leaves were collected from the middle part of the crown at the four cardinal points of each individual. The leaf biomass of each species was determined using allometric equations and the levels of micronutrients in the leaves were determined. Finally, the micronutrient stock and the biological utilization efficiency of forest species were calculated. The collection of litter was realized monthly for a year in three different periods, being them: wet and cold; hot and dry; and, wet and hot. In the litter produced, the levels were determined and the micronutrient contributions were calculated. This, it was possible to estimate the decomposition rate and average renewal time of this litter. Runoff through the trunk was quantified monthly, in the rainy season, subdivided into two periods: less rainy and more rainy using collectors fixed around the trunk arboreal individuals of the species with the highest absolute density. The total and internal precipitation was measured using rain gauges installed inside and at the edge of the fragment. The water flowing through the trunk was measured in milliliters, an aliquot was taken, the pH and electrical conductivity were measured and the K, P and Na input was determined. Through total precipitation, effective precipitation and runoff, effective precipitation was calculated. Forest species used micronutrients differently, favoring interspecific interactions and with the site that are included. The forest species used the micronutrients differently, favoring the interspecific and site interactions that are included. The climatic variations interfered in the litter supply, in the dry and hot period there was a greater deposition. The decomposition rate for the wet periods was around 90%, indicating that during these periods there is rapid decomposition and, consequently, the availability of the nutrients contained in the litter for the ecosystem. Runoff through the trunk of forest species differed by species and had little influence from the rainy season, and proved to be an important pathway for nutrients to enter forest ecosystems, mainly K, effectively participating in nutrient cycling Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação Thu, 20 Feb 2020 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8957 2020-02-20T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8956 Título: Quantificação automatizada de variáveis dendrométricas em plantios experimentais de Eucalyptus sp. utilizando VANT Autor: NOBRE, Sthéfany Carolina de Melo Primeiro orientador: SILVA, Emanuel Araújo Abstract: The objective of this work is to evaluate the accuracy of the use of Unmanned Aerial Vehicle (UAV) based on the structure from motion to support and automate the quantification of dendrometric variables in experimental plantations of Eucalyptus sp. The study area is located in the Campus of Engineering and Agricultural Sciences of the Federal University of Alagoas, located in the municipality of Rio Largo – AL. The data survey was carried out in two experimental areas of forest stand of the hybrid Eucalyptus urograndis (E. grandis X E. urophylla), clones TP361, I144 and VE41. Planting took place in August 2017 in an area of approximately 2.5 hectares. Field data collection was carried out from portions of the Eucalyptus population. Thus, the total height, diameter at breast height (DBH) and crown diameter of all individuals in each plot were measured. To obtain the aerial images, the UAV from the company DJI, model Phantom 4 PRO, with an RGB camera was used. The planning and execution of the flight plan was done through the Dronedeploy application. The flight was carried out around 12h, in full sun condition, in order to minimize the shading effects of clouds and from one individual to another. The images acquired through UAV were processed using the SfM (Structure from motion) in the Agisoft Photoscan software and, in this way, point clouds were generated for each plot obtained in the processing. From the point cloud, digital surface model (DSM) and terrain (DTM) models were generated, followed by the generation of the orthomosaic. Through the difference between the DSM and the DTM, the CHM (Canopy Height Model), a digital crown height model, was generated in the Qgis software. Note that the insertion of control points is essential to reduce errors in image adjustment. So far, it is clear that the products generated from the processing of UAV images with the applied flight configurations, such as MDS, MDT, CHM and orthomosaic, have high resolution, adequate location accuracy and are capable to providing information to assist the steps of the forest inventory. The estimation of dendrometric variables from data from aerial images proved to be feasible and the metrics generated through the lidR and itcSegment package showed a positive correlation between the estimated values and the values measured in the field. It is possible to generate estimates of dendrometric variables such as DBH and heights using measurements calculated from passive sensors embedded in UAVs. These findings in terms of quality of forest attributes using UAV support a promising future in the field of forestry resources for precision forestry. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação Thu, 24 Feb 2022 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8956 2022-02-24T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8955 Título: Aspectos da ecologia de Elaeis guineensis Jacq.: fenologia, entomofauna do solo e produção de serapilheira na Reserva Biológica de Saltinho - PE Autor: LEÃO, Shyrlaine Lilian Moura Primeiro orientador: FELICIANO, Ana Lícia Patriota Abstract: Invasive alien species threaten natural ecosystems, are efficient in the use of natural resources, have the ability to modify the characteristics of the invaded ecosystem, specifying its biodiversity. Some Conservation Units (UCs) in Brazil associate a species Elaeis guineensis as an invasive species, however, studies that proves an invasion of this species need to be carried out. Thus, the present study aimed to evaluate whether an exotic species Elaeis guineensis is causing negative effects on soil entomofauna, soil and litter in the Saltinho Biological Reserve - PE, as well as to evaluate its phenology. The phenology of the species was evaluated, the entomofauna and the contents of the macronutrients of the soil and litter were analyzed compared to two areas. For the phenological studies, 20 matrices of the species under study were selected, observing how vegetative and reproductive phenophases, monthly for a period of one year, and dendrophenogram were elaborated associating phenophases with climatic factors. To assess the possible environmental impact of the species on the environment using the soil entomofauna indicator, two areas were selected, one with the direct influence of the species E. guineensis (A1) and the other without influence (A2), as areas were at a distance approximately 50 m. Pitfall capture traps were installed, 10 in area A1 and 10 in A2, the collected organisms were screened and identified at order level. The number of orders in order of frequency was counted and the chi-square test was used to compare two areas. For the analysis of soil and litter, the same areas of the soil entomofauna methodology were used. In the soil collections, 10 were removed from each studied area, at a depth of 0-0.20 m, 15 cm away from the base of the palm trees in area A1 and randomly in A2, using a treatment to remove these people. Subsequently, the determination of macronutrients N, P, K, Ca and Mg was carried out. For the collection of litter, a square template of 0.25 x 0.25 m was used, randomly launched 10 times in each area. The collection the collection of soil and litter, the determination of macronutrients N, P, K, Ca and Mg was carried out. The results were compared using the T test at the level of 5% significance, with the aid of the statistical package R. The matrices were in constant defoliation, with homogenization in the litter of the areas with the presence of the studied species. The presence of fruits in the matrices was observed, during all studied period. The number of entomofauna visitors from the soil captured in the area with the presence of oil palm, was lower than the number sampled in the area without the influence of this species. The presence of E. guineensis is not causing significant changes in the characteristics of macronutrients in the soil and litter. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Dissertação Thu, 27 Aug 2020 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8955 2020-08-27T00:00:00Z