PPGEA

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Navegando PPGEA por Autor "021.810.303-40"

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    Cultivo de crisântemo sob adubação mineral, cinza vegetal e organomineral associado à calagem
    (Universidade Federal de Mato Grosso, 2022-02-18) Meneghetti, Luana Aparecida Menegaz; Silva, Edna Maria Bonfim da; 960.432.454-34; http://lattes.cnpq.br/8660058048761423; Silva, Edna Maria Bonfim da; 960.432.454-34; http://lattes.cnpq.br/8660058048761423; Duarte, Thiago Franco; 011.291.431.47; http://lattes.cnpq.br/7076042826792327; Silva, Tonny José Araújo da; 781.203.064-49; http://lattes.cnpq.br/0651075688988405; Pinheiro, Everton Alves Rodrigues; 021.810.303-40; http://lattes.cnpq.br/2790021654126083
    The production of ornamental flowers in Brazil is an activity of great economic importance in the country. For the vigorous development of flowers, it’s necessary to properly manage soil fertility. The objective was to evaluate different types of fertilization under two levels of liming in the development and production of potted chrysanthemum in Oxisol, cultivated in a greenhouse. The experiment was carried out at the Federal University of Rondonópolis, in a greenhouse of the Postgraduate Program in Agricultural Engineering. The experimental design was in randomized blocks, with a 5x2 factorial scheme, with five types of fertilization (incubated wood ash, non-incubated wood ash, organomineral (50% mineral fertilizer and 50% wood ash), mineral fertilizer and control) and two types of liming (with liming and without liming), with five replicates, totaling 50 experimental units (UEs). The soil used in the experiment was the Oxisol and the chrysanthemum cultivar used was the white Singelo. The variables analyzed are plant height, number of leaves, leaf area, root volume, dry mass of roots, chlorophyll index, water use efficiency, total water consumption and soil chemical characteristics (pH, macronutrients and micronutrients). The data were submitted to analysis of variance by the F test, and when significant they were submitted to the Tukey test at 5% probability. The SISVAR software was used to perform the statistical analysis. The productive and phytometric variables were significant only for fertilization in isolation, except for plant height, which was significant for factor liming and fertilization in isolation. There was interaction between the factors in pH. All chemical characteristics and macronutrients were statistically significant for the types of fertilization and liming, except for sulfur, which was significant only for types of fertilization. There was interaction between the factors in the variables aluminum (Al), magnesium (Mg) and base saturation (V%). Regarding micronutrients, except for iron, treatments with liming and fertilizers with wood ash in their composition provided a higher content of these nutrients in the soil. Wood ash reduces the dependence on liming and mineral fertilizer in potted chrysanthemum plants. Organomineral fertilizer is an alternative for reducing the volume of wood ash and the use of mineral fertilizer. Wood ash is an alternative fertilizer for growing potted chrysanthemum.
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    Desenvolvimento e avaliação de um protótipo para resfriamento evaporativo em casa de vegetação
    (Universidade Federal de Mato Grosso, 2020-02-28) Dias, Douglas Edson; Silva, Tonny José Araújo da; 781.203.064-49; http://lattes.cnpq.br/0651075688988405; Silva, Tonny José Araújo da; 781.203.064-49; http://lattes.cnpq.br/0651075688988405; Pinheiro, Everton Alves Rodrigues; 021.810.303-40; http://lattes.cnpq.br/2790021654126083; Venzon, Marcio; 007.858.849-98; http://lattes.cnpq.br/2300724138455419
    Greenhouses are extremely important devices for world agriculture, including researching and cultivation of cultures that need protection from climatic adversities. In most greenhouses in hot climates, the control of the microclimate is performed by pad-fan type evaporative air systems. In this condition, this work aimed to develop a small-scale prototype of a system where the conventional fan is replaced by a rotating turbine ventilator, aiming to evaluate cooling efficiency and air humidification. The prototype was developed at Federal University of Mato Grosso, Rondonópolis – MT, Brazil, and was composed of two structures (greenhouses) with approximate volumes of 9 m³, each with a type of material in its evaporative panel (cellulose and expanded clay). The structure was monitored by temperature and humidity sensors, in order to record the local microclimate for one month. Graphs and isotherms were generated that allowed the analysis and comparison of the structures. The results showed that the materials used in the evaporative cooling panel were not very efficient. When compared, the cellulose panel had a better cooling efficiency compared to the expanded clay.