TCC - Bacharelado em Agronomia (UAST)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/2928
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Item Influência do sombreamento associado ao uso de regulador de crescimento em características agronômicas do girassol ornamental (Helianthus annuus)(2020) Oliveira, Cibely Ferreira de; Almeida, Rosa Honorato de; http://lattes.cnpq.br/4319299572657528; http://lattes.cnpq.br/2451690212011839One of the bottlenecks seen by ornamental sunflower producers in the semi-arid region of the Northeast are edaphoclimatic factors, such as temperature and excessive light, in addition to practical crops, such as soil cover, making it necessary to carry out alternatives that mitigate this stress caused on the plant. Thus, an experiment was conducted in an experimental area at the Federal Rural University of Pernambuco, at the Serra Talhada UFRPE / UAST Academic Unit, from November 2019 to January 2020. With this work, the effects of using of different levels of shading combined with regulator of different dose levels in the growth, development and production of flowers in the sunflower culture. The experimental design used was completely randomized in a 4x4 factorial scheme, with treatments referring to the four levels of growth regulator doses 0; 2; 4 and 6 mg / L-1 in interaction with four shading 0, 30, 50 and 70% for flower production in sunflower culture. Three repetitions were used, with two replicates for each repetition, where the sunflower was evaluated. The treatments started to be applied 15 days after seedling emergence (DAE) and another 15 days when the plant had 6 true leaves. Due to flowering, the phytomass, fresh and dry plant variables, number of leaves, buds and flowers, and plant height were evaluated. In relation to plant height for commercialization, the control showed a better performance. Shading at 30% showed increases in fresh and dry phytomass. For the number of leaves, the highlight was the 70% shaded plants.Item Manejo de produção do girassol anão de jardim(2019-12-18) Nascimento, Tamires Keila Araújo dos Santos; Silva, Luzia Ferreira da; http://lattes.cnpq.br/6320449537171549The Sunflower (Helianthus annuus L) is an ornamental cut and vase flower that has great expression in the market, because it has an expressive beauty, shape and different color. Sunflower harvesting point is an important factor for growers, which is characterized by its stem length over 50 cm. On the other hand, there is the demand of consumers, who prefer compact plants and inflorescence that has 10 to 15 cm in diameter. Studies on the breakdown of apical dominance, through the management known as pinch in sunflower crop, are carried out so that the lateral stems reach the largest size. However, the use of phytoregulators may increase or decrease both the main and lateral stems. Given this, the work evaluated whether sunflower flowering depends on the conditions of different types of harvest management. For that, a randomized design with four treatments and five repetitions was used. The treatments were: removal of the main chapter, removal of the main chapter and application of the gibberellin growth hormone, removal of lateral shoots and spontaneous development of the plant (control). To evaluate the effect of management on plant growth were analyzed: plant height (AP), stem diameter (DH), stem length (CH), number of leaves (NF), chapter outer diameter ( DE) and beginning of flowering (IF). The evaluations of fresh and dry mass were performed before the management application with the removal of one plant in the vegetative phase and the second in the reproductive phase. At 58 days after planting (DAP), the number of lateral shoots in the treatment with main chapter removal and gibberellin application was higher than the other treatments. Plant height, leaf number and diameter did not differ significantly between treatments. The removal of the side buttons did not influence the outer diameter of the chapter. Therefore, the different types of management applied at 44 days were not sufficient to verify their influence on the flowering of the plant.