Mestrado em Agricultura Tropical
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2010
Conceito atual na CAPES: 4
Ato normativo: Homologado pelo CNE (Portaria MEC nº 656 de 22/05/2017) Publicação DOU em 27/07/2017, Seç. 1; Pag. 36. Parecer 288/2015
Periodicidade de seleção: Semestral
Área(s) de concentração: Agricultura Tropical
Url do curso: https://agriculturatropical.ufes.br/pt-br/pos-graduacao/PPGAT/detalhes-do-curso?id=1079
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- ItemEficiência fotoquímica e carboidratos foliares de clones de Theobroma cacao L. sob diferentes regimes de luz em sistemas de cultivo(Universidade Federal do Espírito Santo, 2025-08-11) Vitoria, Jan da; Arantes, Sara Dousseau; https://orcid.org/0000-0001-6202-4153; http://lattes.cnpq.br/6966978781439168; https://orcid.org/0009-0006-6353-1388; http://lattes.cnpq.br/2801301509481679; Oliveira, Vinicius De Souza; https://orcid.org/0000-0003-4068-1587; http://lattes.cnpq.br/7213222193584056; Dias, Carla da Silva; https://orcid.org/0009-0005-6102-6057; http://lattes.cnpq.br/0497776503129914The aim of this study was to evaluate the physiological and biochemical responses of Theobroma cacao L. leaves grown under different light conditions (full sun, Cabruca and agroforestry system – AFS), focusing on chlorophyll a fluorescence, photosynthetic pigments and non-structural carbohydrates. The clones PH16, PS1319 and CEPEC 2002 were analyzed over the course of one year. The results revealed that the AFS and Cabruca systems favored photochemical efficiency, with higher values of Fv/Fm and Y(II), while full sun induced partial photoinhibition, mainly during peak light hours. Total chlorophyll content was higher under shade, especially in PS1319 in the AFS. In contrast, PH16 maintained high values even under full irradiance, evidencing greater tolerance to light stress. Sucrose accumulation varied between clones and environments, with emphasis on PH16 in SAF and PS1319 in Cabruca. Multivariate analysis (PCA) confirmed the physiological separation between clones and the influence of the environment on photosynthetic efficiency. The results indicate that clones PH16 and PS1319 present high physiological and biochemical plasticity, being promising for systems with different light regimes.
- ItemDimensionamento amostral e tamanho ótimo de parcela na experimentação com mudas clonais de cacaueiro(Universidade Federal do Espírito Santo, 2025-09-26) Morais, Letícia Galvão; Santana, Enilton Nascimento de; https://orcid.org/0000-0002-8828-0515; http://lattes.cnpq.br/2422824511849628; Schmildt, Edilson Romais; https://orcid.org/0000-0002-3457-7997; http://lattes.cnpq.br/0648502408490406; https://orcid.org/0009-0008-6837-7425; http://lattes.cnpq.br/0929483910063628; Altoé, Jalille Amim; https://orcid.org/0000-0002-1433-3709; http://lattes.cnpq.br/1448633584712408; Souza, Carlos Alberto Spaggiari; https://orcid.org/0000-0001-7424-8277; http://lattes.cnpq.br/0269965409811811Cocoa is a crop of great economic importance for Brazil and has been economically exploited since the 1930s. Therefore, the crop has undergone and continues to undergo several improvement processes that have allowed its production to be diversified. For this to continue, scientific experiments are essential, especially those aimed at evaluating the quality of seedlings, since this is the main form of crop propagation, and there is a specific number of clonal varieties. In this type of experiment, there is no consensus regarding the amount of material necessary to obtain reliable results, moreover, when evaluating a characteristic, it is common to observe variation between plants, even among those subjected to the same treatment. Therefore, it is important to base on a scientific justification to determine the amount of material that will be used to carry out effective experimental planning. In this sense, the objective was to determine, through two different methodologies, the amount of material, that is, the number of plants, that should be used in the experimentation with clonal cocoa seedlings. Therefore, the sample size was determined using the deterministic method, and the optimal plot size was determined using the modified maximum curvature method with bootstrap simulation. In both cases, 50 seedlings from six different clones were used, totaling 300 plants. 12 morphological traits and four indexes used in seedling morphological characterization studies were evaluated. Descriptive statistics were performed, including: mean, median, maximum, minimum, standard deviation, and coefficient of variation. For the first chapter, the sample size was also determined using the Kolmogorov-Smirnov normality test and skewness. A sample size was determined for estimating errors set at 5%, 10%, 15%, 20%, 25%, and 30% of the mean, with a 95% confidence level. The sample size for evaluating traits obtained by measurement, weighing, leaf number, leaf area, root number, and volume increases in this order. For the indexes, the sample size increases in the order of IR, IRC, IQD, and AFE. Allowing for a 20% error, the sample size of 119 seedlings covers the six clones used in this study, as well as the sixteen variables evaluated. In the second chapter, the optimal plot size for experimentation with clonal cacao seedlings was determined, and the value found was nine plants per experimental plot.
- ItemProdução do cafeeiro conilon empregando déficit e alternância na irrigação por gotejamento(Universidade Federal do Espírito Santo, 2026-01-20) Lopes, Vanessa Chaves; Bonomo, Robson; https://orcid.org/0000-0002-4022-8216; https://lattes.cnpq.br/7564190687163814; https://orcid.org/0009-0006-5616-9499; https://lattes.cnpq.br/5842361106464695; Oliosi, Gleison; https://orcid.org/0000-0001-8911-4976; https://lattes.cnpq.br/6488125967999191; Quartezani, Waylson Zancanella; https://orcid.org/0000-0002-2700-332X; https://lattes.cnpq.br/5049820995551608Brazil is the world's largest coffee producer, and coffee farming in the country has expanded into areas with significant climatic variability, which is exacerbated by current changes in temperature and rainfall patterns, presenting significant water supply problems for coffee plants. Among the techniques used for water conservation, drip irrigation with Controlled Alternating Partial Irrigation of the Root Zone (APRI) and Irrigation Deficit (DI) stand out. The experiment was implemented in the field in July 2019 and evaluated until July 2024, using genotypes 143. Two drip irrigation tubes were installed per row of plants, one on each side of the root system. The amount of water applied to the treatments was calculated from the crop evapotranspiration for localized irrigation (ETcloc). The experimental design adopted was randomized blocks, with nine treatments and four replications. The treatments included replacing 50% of the crop evapotranspiration for localized irrigation (ETcloc) at intervals of 3, 7, and 14 days, and 100% of ETc at the same intervals. It also included a treatment with controlled deficit irrigation, applying 50% of ETc, in addition to fixed irrigation with 100% of ETc applied by two drip lines and fixed irrigation with 100% of ETc applied by one drip line on only one side of the root system, representing the standard irrigation management in the region. Productivity, yield, coffee bean classification by sieve, and water use efficiency (WUE) were evaluated. Average productivity, yield, and sieve classification did not show differences according to Tukey's test. Therefore, in general, the treatments that received 50% of the replacement blade obtained the highest EUA values.
- ItemAvaliação de cultivares de maracujazeiro no Norte do Espírito Santo(Universidade Federal do Espírito Santo, 2024-02-29) Rodrigues, Johnny da Silva; Schmildt, Edilson Romais ; https://orcid.org/0000-0002-3457-7997; http://lattes.cnpq.br/; Arantes, Sara Dousseau ; https://orcid.org/0000-0001-6202-4153; http://lattes.cnpq.br/; https://orcid.org/0000-0002-3364-1336; http://lattes.cnpq.br/; Falqueto, Antelmo Ralph ; https://orcid.org/0000-0003-3146-1873; http://lattes.cnpq.br/; Souza, Thiago Corrêa de ; https://orcid.org/0000-0002-4991-7704; http://lattes.cnpq.br/Brazil is the largest producer of passion fruit, but little is known about the adaptability of recently released cultivars in different producing regions. This study aims to evaluate the vegetative and reproductive development of sour and sweet passion fruit cultivars in the northern coast of Espírito Santo. Five sour passion fruit cultivars (Passiflora edulis Sims f. flavicarpa, cv. ‘BRS Gigante Amarelo’, “BRS Rubi do Cerrado’, ‘BRS Sol do Cerrado', “FB-200 Yellow Master' and ‘FB-300 Araguari') and three sweet passion fruit cultivars [P. setacea DC. cv. (BRS Pérola do Cerrado'), P. cincinnata Mast. (BRS Sertão Forte’) and P. alata Curtis (BRS Mel do Cerrado’)] were evaluated. The experiment was conducted from August 2021 to July 2023 in the municipality of Sooretama/ES, using a randomized block design with 8 treatments, 9 replicates, and 5 plants per plot. Vegetative development was assessed 50 and 90 days after transplanting. Productivity and physicochemical fruit quality were evaluated during two productive cycles. Data were subjected to analysis of variance and means were grouped using the Scott Knott test (p<0.05). Vegetative development was superior in ‘BRS Sertão Forte' and inferior in ‘BRS Mel do Cerrado' and “BRS Pérola do Cerrado’. Higher productivity was obtained in sour passion fruits compared to sweet ones. However, the harvest was staggered throughout the year. Production was superior in “FB-300 Araguari' and ‘BRS Rubi do Cerrado', while fruit quality was similar among the sour cultivars. “BRS Pérola do Cerrado' had a higher number of fruits and vitamin C content, while ‘BRS Mel do Cerrado' had higher soluble solids content and ratio. Staggered harvesting can be an alternative for income distribution for farmers, while the distinct quality among cultivars allows for targeting different markets
- ItemTecnologia de aplicação com aeronave não tripulada no manejo da sigatoka na cultura da banana(Universidade Federal do Espírito Santo, 2025-09-02) Schaeffer, Maickel Lucas; Vitória, Edney Leandro da; https://orcid.org/0000-0002-2268-6037; http://lattes.cnpq.br/5385859254036142; https://orcid.org/0000-0001-9976-2379; http://lattes.cnpq.br/3112391509157438; Fernandes, Adriano Alves; https://orcid.org/0000-0002-5016-0745; http://lattes.cnpq.br/4927918119791381; Oliveira, Ednaldo Miranda de; https://orcid.org/0000-0002-1182-7623; http://lattes.cnpq.br/5438678030553977; Araújo, Rychardson Rocha de; https://orcid.org/0000-0003-2500-0923; http://lattes.cnpq.br/8834429015420309Banana farming is strategically important for Brazilian agribusiness, with Espírito Santo standing out as a key production hub. However, fungal leaf diseases such as Sigatoka spp. severely compromise productivity, requiring efficient chemical control. Remotely Piloted Aircraft (RPA) emerge as a promising alternative to traditional application methods, offering greater precision and lower environmental impact. This study aimed to define the optimal flight configurations (application rate and droplet size) for aerial spraying via RPA in 'Prata' banana plants, seeking to optimize droplet deposition and Sigatoka control. The experiment was conducted in Linhares, ES, using a randomized block design with five replications in a 4×3 factorial arrangement: four application rates (8, 10, 12, and 14 L ha⁻¹) and three droplet sizes (180, 240, and 300 μm), employing a DJI Agras T40 RPA at 4.5 m height and 20 km h⁻¹. Deposition was assessed using water-sensitive papers and PVC tags, while disease control was evaluated using systemic fungicides (groups C2 and G1), applied monthly for three months, with weekly post-application monitoring following Stover’s methodology. Results showed that the 14 L ha⁻¹ rate provided 120% greater coverage than 8 L ha⁻¹, while 240 μm and 300 μm droplets performed similarly, surpassing 180 μm droplets by 45%. The 8 L ha⁻¹ rate resulted in 46.06% lower droplet density than 14 L ha⁻¹, with 180 μm and 240 μm droplets producing 21.73 droplets cm⁻² (55.7% higher than 300 μm). Regarding drift potential, the combination of 12 L ha⁻¹ with 300 μm droplets showed the lowest Drift Risk Potential (DRP) and higher Dv0.1, indicating fewer ultra-fine droplets. The Volumetric Median Diameter (VMD) was directly influenced by nominal droplet size, with 12 L ha⁻¹ + 300 μm showing less than 14% variation, indicating greater stability and lower drift risk. The most efficient deposition was achieved with 10 L ha⁻¹ + 240 μm. For Sigatoka control, the treatments 14 L ha⁻¹ + 300 μm (77.2% relative efficacy), 8 L ha⁻¹ + 300 μm (74.6%), and 8 L ha⁻¹ + 240 μm (68.9%) stood out, maintaining consistent performance over time and ranking among the top five in integrated temporal efficacy. In conclusion, the interaction between operational parameters significantly influences application quality and disease control, with specific combinations optimizing coverage, deposition, and drift reduction.