https://repositorio.ufu.br/handle/123456789/5161 Mon, 27 Apr 2026 22:54:38 GMT 2026-04-27T22:54:38Z https://repositorio.ufu.br/handle/123456789/48656 Title: Estimativa de poluentes atmosféricos emitidos pela frota de veículos da cidade de Uberlândia/MG, no período de 2022-2023 Abstract: This study aimed to gather information on all vehicles registered in the municipality of Uberlândia-MG and to estimate the emissions of atmospheric pollutants, namely particulate matter (PM), carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (HC), carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), generated by vehicular traffic within the urban road network for the years 2022 and 2023. A bottom-up methodology was employed for all pollutants, except for CO2, which was estimated using a top-down approach. The selection of pollutants was based on data availability from the vehicular emissions reports published by CETESB (2022 and 2023). The estimated annual average emissions were: 43.97 tons of PM, 2,246.18 tons of CO, 4,339.34 tons of NOx, 365.78 tons of HC, 1,486.44 tons of CO2, 311.67 tons of CH4, 196.14 tons of N2O, and 1,552,683.99 tons of CO2e, considering all the Uberlandia vehicle fleet. The results highlight high emissions of PM and NOx, primarily due to the heavy-duty vehicle fleet, and significant emissions of CO and HC, mainly from light-duty vehicles. These findings suggest the need for investments and incentives toward public transportation and the adoption of alternative fuels to diesel. The results are crucial for the atmospheric emissions inventory of Uberlândia, which, in turn, plays an important role in strategic decision-making aimed at improving urban air quality. Fri, 29 Aug 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48656 2025-08-29T00:00:00Z https://repositorio.ufu.br/handle/123456789/48592 Title: Estimativas de parâmetros genéticos, correlações e índices de seleção em linhagens de alface crespa, roxa e biofortificada Fri, 13 Mar 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48592 2026-03-13T00:00:00Z https://repositorio.ufu.br/handle/123456789/48572 Title: Comportamento espacial dos atributos fisiológicos de sementes de soja de um campo de produção Abstract: Soybean seeds may exhibit distinct quality levels when produced in different management zones. This study aimed to evaluate the physiological attributes of soybean seeds and identify their variability and spatial distribution using geostatistical tools. Data were collected at the Glória Farm (Uberlândia, MG) and analyzed at the Seed Analysis Laboratory of the Federal University of Uberlândia (Umuarama Campus). Soybean seeds were harvested from 48 georeferenced points to determine their physiological behavior and spatial dependence patterns. The variability of physiological quality attributes from different zones was assessed through germination, accelerated aging, seedling emergence, electrical conductivity, and seedling length tests. Previously analyzed soil attributes, along with initial plant stand and seed yield, enabled the validation of management zones. Physiological seed quality is not uniformly distributed across the production field; therefore, geostatistics is an effective tool for determining the spatial distribution of physiological quality attributes in soybean seed production areas. Fri, 13 Mar 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48572 2026-03-13T00:00:00Z https://repositorio.ufu.br/handle/123456789/48562 Title: Desenvolvimento da abóbora manteiga (Cucurbita moschata Duchesne) em resposta a doses crescentes de Ethrel®720. Abstract: Butternut squash stands out among cucurbits cultivated in Brazil due to its wide edaphoclimatic adaptation, high nutritional value, and socioeconomic importance. However, the crop presents physiological limitations related to sexual expression, characterized by the predominance of male flowers, especially under hot climate conditions, which compromises fruit set and productivity. Therefore, floral differentiation and the induction of female flowers in cucurbits remain a major challenge. In this context, the present study aimed to evaluate the effects of different doses of Ethrel 720® on vegetative growth, floral expression, and productive characteristics of butternut squash. The experiment was conducted using increasing doses of the growth regulator (0, 150, 300, 450, 600, and 750 mL ha⁻¹), applied in two sequential applications at 30 and 45 days after transplanting the seedlings to the field. Irrigation was performed by drip irrigation every two days, supplying sufficient water to ensure the formation of a wetted soil bulb. Plants were monitored for vegetative development, branching, and productive units. The results showed non-linear responses to ethephon doses, with intermediate doses promoting a better balance between vegetative and reproductive growth, whereas higher doses resulted in limiting physiological effects. It is concluded that the rational use of ethephon can be an efficient strategy for managing sexual expression in butternut squash, contributing both to vegetative growth at lower doses and to an increase in potentially productive flowers (450 mL ha⁻¹ treatment), consequently increasing the number of fruits per plant (450 mL ha⁻¹ treatment) and improving fruit quality, as indicated by higher soluble solids content (15% Brix) in treatments between 450 mL ha⁻¹. Fri, 06 Mar 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/48562 2026-03-06T00:00:00Z