TCC Engenharia Agronômica

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https://repositorio.ifal.edu.br/handle/123456789/41

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Navegando TCC Engenharia Agronômica por Autor "Cruz, Ellen Abreu da"

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    Acúmulo de biomassa em cultivares de sorgo sob duas densidades de plantio no sertão de Alagoas
    (INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2021-10-14) Silva, Raquel Soares da; Cruz, Ellen Abreu da; http://lattes.cnpq.br/8433613370953519; Souza, Ênio Gomes Flôr; http://lattes.cnpq.br/9225008513028085; Gouveia Neto, Gilberto da Cruz; http://lattes.cnpq.br/4102915858451049; Ferraz, André Pereira Freire; https://orcid.org/0000-0001-8628-9420; http://lattes.cnpq.br/0500595014121582
    In the western region of Alagoas, there is an obstacle in the production of food for animals: low productivity, resulting in few stocks of feed for the dry season, which can last for months or years. Dealing with this issue, it is necessary to study different sorghum cultivars that enable the producer to use genetic materials that best develop in his property. There is also the importance of the analysis of planting densities, in order to favor greater growth and productivity to the culture. Therefore, the objective was to evaluate the biomass accumulation of sorghum cultivars produced at two planting densities in the western region of Alagoas. The experiment was conducted in the experimental field of the Federal Institute of Alagoas, Piranhas Campus, in dryland cultivation, between June and September 2019, under randomized block design, with treatments arranged in a 4 x 2 factorial scheme, with four repetitions. The treatments consisted of four sorghum cultivars, three forage (BRS Ponta Negra, IPA 467, and Chopper) and one grain (IPA 1011), and two planting densities: 187.5 thousand plants ha-1 (three plants per pit every 0.20 m) and 250 thousand plants ha-1 (two plants per pit every 0.10 m). At the pasty/farinaceous grain stage, the following were evaluated: fresh and dry masses of leaves, stem, panicle, and total; percentage of dry mass; and productivity of fresh and dry mass. The planting densities did not influence the aboveground biomass accumulation of the sorghum cultivars. The average dry mass accumulation reached 27.47 g plant-1 in the stem, 17.20 g plant- 1 in the leaves and 7.45 g plant-1 in the panicle. The cultivars BRS Ponta Negra and IPA 467 obtained the highest total values of fresh and dry mass, while Chopper and IPA 1011 accumulated more panicle biomass than the others. The fresh mass yields were 42.84 t ha-1 (BRS Ponta Negra), 39.95 t ha-1 (IPA 467), 28.85 t ha-1 (IPA 1011) and 23.41 t ha-1 (Chopper), with an average dry mass percentage of 28.81 %. In both planting densities studied, the cultivars BRS Ponta Negra, IPA 467 and IPA 1011 constituted genetic materials of high potential for biomass production in the edaphoclimatic conditions of Alagoas.
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    Características agronômicas e qualidade pós-colheita de cultivares de alface em função de épocas de cultivo no oeste alagoano
    (INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2021-09-28) Pereira, Dalbert de Freitas; Cruz, Ellen Abreu da; http://lattes.cnpq.br/8433613370953519; Souza, Ênio Gomes Flôr; http://lattes.cnpq.br/9225008513028085; Moraes, Juliana de Oliveira; http://lattes.cnpq.br/0249683112485476; Coelho Júnior, Luiz Ferreira; https://orcid.org/0000-0002-3845-4054; http://lattes.cnpq.br/8286952885006223
    Lettuce, when produced in adverse environmental conditions, as found in the arid northeastern Brazilian state of Alagoas, is induced to precocious flowering and low quality, not reaching the maximum vegetative potential of the crop. Adequate choice of cultivar and growing season are crucial for the successful planting of this vegetable. Accordingly, the main objective of this work was to evaluate the production and postharvest quality of lettuce cultivars as a function of different growing seasons in the municipality of Piranhas, west of the state of Alagoas– Campus Piranhas. Two experiments were conducted, one in the winter of 2019 and the other in the summer of 2020, at the Alagoas Federal Institute of Technology’s Experimental Area. The experimental process was designed on a randomized blocks basis, with four reproductions, and with treatments referring to the following cultivars: Babá-de-Verão, Cinderela, Elba, Mônica, Solaris and Veneranda. The agronomic characteristics evaluated in this process were the following: plant height and diameter, number of leaves per plant, stalk length and diameter, green mass yield and dry mass yield. The postharvest characteristics evaluated were the following: a, b and total chlorophylls, carotenoids, total soluble solids (TSS), pH, total titratable acidity (TTA) and TSS / TTA ratio. Regarding plant diameter, winter cultivation showed to be more appropriate than summer one, except for Babá-de-Verão, which maintained its performance; on the other hand, all cultivars had equal diameters in winter and Babá-de-Verão performed better on summer. The winter cultivation provided the best performance for the cultivars, with plant height of 19.46 cm, stalk diameter of 1.81 cm and green mass yield of 25.68 t ha-1 , while on summer they reached the greatest number of leaves (19.39 leaves per plant). Mônica cultivar reached the highest stalk length (10.69 cm), indicating less tolerance to early braiding, so it is not suitable for cultivation in the region. Babá-de-Verão reached the highest yield of green mass (26.95 t ha-1 ), number of leaves per plant (27.60 leaves) and stalk diameter (2.17 cm), being the most suitable cultivar for the west of Alagoas context. Among the crimpy cultivars, Elba, Solaris and Veneranda prevailed. The Babá-de-Verão cultivar presented the best performance for a, b and totals chlorophylls, with averages of 7.73 μg g -1 ; 5.16 μg g -1 and 12.89 μg g -1 , respectively. Solaris showed the highest concentration of carotenoids (1.02 μg g -1 ). Concerning TSS, there was no difference in the mean test between cultivars (4.72 oBrix). Winter plants achieved higher chlorophylls at (6.62 μg g -1 ) and total (10.46 μg g -1 ), carotenoids (1.01 μg g -1 ), pH (6.24) and TSS / TTA (8.14), whereas summer lettuce approached a higher TSS (4.97 oBrix) and TTA (0.68 %). Lettuce produced on winter reached better post-harvest quality, with higher percentage of photosynthetic pigments and lower acidity.