Mestrado em Agronomia
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2004
Conceito atual na CAPES: 4
Ato normativo: Mestrado - Reconhecido Port. MEC 609, de 14/03/2019, DOU 18/03/2019, parecer 487/2018).
Periodicidade de seleção: Semestral
Área(s) de concentração: Produção Vegetal
Url do curso: https://producaovegetal.ufes.br/pt-br/pos-graduacao/PPGA/detalhes-do-curso?id=1427
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- ItemProduto da calcinação do lodo de esgoto: caracterização e compartimentos de fósforo(Universidade Federal do Espírito Santo, 2025-08-08) Dolabela, Vinícius Feliciano Gomes; Passos, Renato Ribeiro; https://orcid.org/0000-0001-7730-748X; http://lattes.cnpq.br/3882320619443256; Reis, Rayner Hugo Cassa Louzada dos; https://orcid.org/0000-0002-4227-4136; http://lattes.cnpq.br/7684178857424982; Burak, Diego Lang; https://orcid.org/0000-0002-6758-3517; http://lattes.cnpq.br/2501042964619476; https://orcid.org/0009-0001-0549-8616; http://lattes.cnpq.br/6734810163680504; Rangel, Otacílio José Passos; https://orcid.org/0000-0002-1539-6533; http://lattes.cnpq.br/7212423450267908; Mendonça, Eduardo de Sá; https://orcid.org/0000-0003-3284-7129; http://lattes.cnpq.br/4735276653354808Phosphorus (P) is an indispensable element for soil fertility and agricultural production. Given the scarcity of its non-renewable sources, it is necessary to adopt alternative sources of P, such as sewage sludge (SS). For its use, the calcination process can be employed, which may render SS more favorable for agricultural purposes. This study aimed to characterize and analyze the forms of P in calcined sludge. The SS samples were obtained from the company BRK Ambiental, collected from three different wastewater treatment plants (WWTP) located in the municipality of Cachoeiro de Itapemirim/ES, and its districts of Itaoca Pedra and Pacotuba. The samples were calcined in muffle furnaces at three different temperatures, 350 °C, 550 °C, and 750 °C, under two different atmospheres (argon and oxygen), in a 3 × 3 × 2 factorial design, with 3 replications. To analyze the fractions of inorganic P, the Hedley sequential extraction method was applied. The quantification of the residual content strongly bound to the mineral matrix was performed through nitric acid (HNO3) digestion. For chemical characterization of the biosolids, infrared spectroscopy and Xray fluorescence analyses were employed. Subsequently, the data were analyzed using ANOVA, followed by Tukey’s HSD test. The inorganic P contents were high for all three locations, with the sludge obtained from Cachoeiro de Itapemirim standing out, although no significant differences were observed regarding the type of atmosphere. The interaction between the SS source and calcination temperature was significant, demonstrating that temperature effects varied according to the origin of the material. The inorganic P fractions were redistributed into labile and moderately labile forms, with higher calcination temperatures favoring less labile forms. Therefore, materials derived from SS present great potential for application in plant nutrition, with possible improvements in P dynamics in the soil, in addition to reducing the environmental impact of SS disposal.
- ItemTolerância de laranjeiras-doce à tristeza dos citros em combinações com diferentes porta-enxertos no extremo sul da Bahia(Universidade Federal do Espírito Santo, 2025-03-06) Holtz, Filipe Garcia; Zucoloto, Moisés; https://orcid.org/0000-0003-0539-4750; http://lattes.cnpq.br/9552365183163692; https://orcid.org/0000-0001-9669-0189; http://lattes.cnpq.br/5192925227364719; Tomaz, Marcelo Antonio; https://orcid.org/0000-0002-5307-0219; http://lattes.cnpq.br/7116075671588859; Barbosa, Dimmy Herllen Silveira Gomes ; https://orcid.org/0000-0002-4132-4226; http://lattes.cnpq.br/0224172632816293The Citrus tristeza disease (CTV) is a highly destructive viral disease that harms production by causing stunted and chlorotic plants or inducing rapid plant death. Disease management is mainly carried out through the use of tolerant rootstocks; however, the narrow genetic base of seedlings available on the market necessitates new studies. The objective of this research was to assess the tolerance of different sweet orange scion and rootstock combinations to CTV. A total of 59 sweet orange scions were evaluated in combination with the rootstocks 'Sunki Tropical,' 'San Diego,' 'Riverside,' and 'Indio.' Twenty branches from each combination were collected, the bark was removed in the laboratory, and symptom intensity was assessed using a scale ranging from 1 to 2 for low intensity, 3 for intermediate intensity, and 4 to 5 for high intensity. Many combinations with the rootstocks 'Sunki Tropical' and 'San Diego' showed more intense fluting symptoms, but in a low scale, whereas the rootstocks 'Riverside' and 'Indio' showed lower intensity, including combinations without fluting, even with the variety 'Pera', which is known to be intolerant to the disease. Under the conditions studied, the rootstocks were efficient giving tolerance to CTV to the sweet orange scions, with a highlight to the selections ‘Riverside’ and ‘Indio’, which doesn’t show strong symptoms. This data is supported by the production data, where even susceptible cultivars such as the ‘Pera’ selections, presented higher production, above average production for the harvest 2024/25.
- ItemDesempenho vegetativo e produtivo da bananeira cv. 'BRS Platina' em função de doses de nitrogênio, fósforo e potássio(Universidade Federal do Espírito Santo, 2025-08-07) Vidal Júnior, Antonio Carlos de Souza; Rangel, Otacílio José Passos; https://orcid.org/0000-0002-1539-6533; http://lattes.cnpq.br/7212423450267908; Passos, Renato Ribeiro; https://orcid.org/0000-0001-7730-748X; http://lattes.cnpq.br/3882320619443256; https://orcid.org/0009-0001-6028-2332; http://lattes.cnpq.br/5305651888058538; Amaral, José Francisco Teixeira do; https://orcid.org/0000-0003-3027-4830; http://lattes.cnpq.br/1032225749434466; Souza, Gustavo Soares de; https://orcid.org/0000-0002-8207-0218; http://lattes.cnpq.br/6563795137628376Espírito Santo is among the eight largest national banana producers, however, in some producing regions of the State, low productivity is observed. The delay in updating fertilizer recommendations for banana crops may be one of the factors affecting these results. The Espírito Santo State's fertilizer and liming recommendations manual makes no distinction between the different banana subgroups, even though they exhibit distinct field behaviors in terms of height, productivity, production cycles, and other factors. The objective of this research was to evaluate, in field work, the vegetative and productive development of the banana crop cv. ‘BRS Platina’ in response to different doses of N, P2O5 e K2O. The study was implemented in the experimental area of Ifes – Alegre Campus, during the months of June 2023 to May 2024 using chifrinho type seedlings of the banana tree cv. ‘BRS Platina’. A fractional factorial design was adopted, with 17 treatments, 3 replicates and 5 plants per plot. Six nitrogen rates (0, 30, 180, 300, 420 e 570 kg ha-1 of N), six phosphorus rates (0, 10, 60, 100, 140 e 190 kg ha-1 of P2O5) and six potassium rates (0, 35, 210, 350, 490 e 665 kg ha-1 of K2O) were used. Soil chemical parameters, nutritional status, and vegetative and productive development of banana plants were evaluated. Soil pH was not affected by the different fertilizer levels. The use of high doses of K2O reduced the availability in the soil and the absorption of calcium and magnesium by plants. The results obtained of greater bunch mass (14,31 kg) and greater productivity (14,42 t ha-1) were achieved, respectively, with the use of 291,5 kg ha-1 of N, 75,5 kg ha-1 of P2O5 and 425,6 kg ha-1 of K2O; and 299,7 kg ha-1 of N, 80,0 kg ha-1 of P2O5 and 425,6 kg ha-1 of K2O. Potassium stood out as an essential nutrient for achieving higher productivity, reinforcing its importance for managing banana crops. Furthermore, the positive correlation between pseudostem diameter (DP), MC and PD proves to be a useful tool for predicting the productive potential of plants, associating vegetative characteristics with the productive performance of the ‘BRS Platina’ banana plant. Considering that the banana tree tends to express its greatest productive potential throughout the cycles, it is recommended that the evaluations continue for subsequent cycles, with the objective of better characterizing the performance of the ‘BRS Platina’ cultivar, as well as providing a database to assist in the preparation of new fertilization recommendation tables for the State of Espírito Santo.
- ItemManejo do ácaro-rajado, Tetranychus urticae koch (Acari: Tetranychidae), com bioinsumos vegetais e emulsificados(Universidade Federal do Espírito Santo, 2025-07-25) Piffer, Ana Beatriz Mamedes; Holtz, Anderson Mathias; https://orcid.org/0000-0002-1374-1049; http://lattes.cnpq.br/3943417292642301; Santos, Délia Chaves Moreira dos; https://orcid.org/0000-0002-9296-1989; http://lattes.cnpq.br/2418116312675733; Pratissoli, Dirceu; https://orcid.org/0000-0003-4485-1491; http://lattes.cnpq.br/4015405807686646; https://orcid.org/0000-0002-7777-7382; http://lattes.cnpq.br/; Santos Júnior, Hugo José Gonçalves dos; https://orcid.org/; http://lattes.cnpq.br/; Damascena, Alixelhe Pacheco; https://orcid.org/; http://lattes.cnpq.br/; Oliveira, Regiane Cristina; m; mThe two-spotted spider mite, Tetranychus urticae Koch, 1836 (Acari: Tetranychidae), is one of the major agricultural pests worldwide. In this context, this study aimed to investigate the acaricidal activity of the vegetable oils from Allium sativum (garlic), Annona muricata (soursop), Azadirachta indica (neem), and the isolated compound D-limonene (1) individually and in combinations under laboratory conditions, as well as (2) an emulsion of the combined vegetable oils both in laboratory assays and greenhouse conditions for the suppression of T. urticae. Based on the laboratory tests with the oils, (1) each oil individually showed significant efficacy in reducing egg viability and inducing adult mortality. Combinations of the oils further enhanced the acaricidal effect, with significant outcomes across both exposure routes. Subsequently, (2) the emulsion exhibited a dose-dependent effect, significantly reducing egg viability and increasing adult mortality in laboratory trials. Under greenhouse conditions, a substantial reduction in mite populations was observed. Altogether, it can be concluded that vegetable oils, particularly when used in combination and as emulsions, are effective for the management of T. urticae. These findings contribute to the recent trend of developing emulsions as bioproducts.
- ItemEficiência de ureia e inibidor de urease no cultivo de milho(Universidade Federal do Espírito Santo, 2025-08-05) Souza, Denilson Almeida de; Reis, Edvaldo Fialho dos; https://orcid.org/0000-0003-3823-1472; http://lattes.cnpq.br/2317496014692033; Tomaz, Marcelo Antonio; https://orcid.org/0000-0002-5307-0219; http://lattes.cnpq.br/7116075671588859; Amaral, José Francisco Teixeira do; https://orcid.org/0000-0003-3027-4830; http://lattes.cnpq.br/1032225749434466; https://orcid.org/0009-0008-3481-384X; http://lattes.cnpq.br/0530353580047207; Dalvi, Leandro Pin; https://orcid.org/0000-0002-2995-8007; http://lattes.cnpq.br/7662111330884819; Souza, Gustavo Soares de; https://orcid.org/0000-0002-8207-0218; http://lattes.cnpq.br/6563795137628376Maize (Zea mays L.) is a crop of high economic and nutritional importance, widely used for silage production in Brazil. Among nutrients, nitrogen plays a decisive role in growth, development, and yield, with urea being the main source applied in agriculture. However, volatilization losses reduce its efficiency, making the adoption of urease inhibitors a relevant alternative. In this context, this study aimed to evaluate the agronomic and economic efficiency of conventional urea compared with urea treated with the urease inhibitor NBPT, under different nitrogen rates, in maize cultivated for silage production. The experiment was conducted in Alegre, Espírito Santo State, Brazil, during the 2023/2024 growing season, in a randomized block design. Physiological variables (chlorophyll a, chlorophyll b, flavonoids, and nitrogen balance index) and morphological traits (plant height and stem diameter) were assessed under a split-split plot arrangement (2 × 4 × 3), with two N sources, four rates (0, 50, 100, and 150 kg ha⁻¹), and three phenological stages (V5, V9, and tasseling). Productive variables (leaf, stem, and ear dry matter, total dry matter, silage yield, and leaf N content) were evaluated under a split-plot scheme (2 × 4). The results revealed significant interactions among nitrogen source, rate, and phenological stage for physiological and morphological traits, highlighting the temporal dependence of maize response to N management. NBPT-treated urea enhanced nutrient use efficiency, resulting in higher chlorophyll contents, greater nitrogen balance index, increased plant height and stem diameter, and, most importantly, greater dry matter accumulation and silage yield. Yield responses followed a quadratic pattern, with intermediate doses providing the highest results, whereas higher doses did not translate into additional gains. The economic analysis showed that NBPT-treated urea provided higher net returns per hectare, outperforming conventional urea despite its higher initial cost. It is concluded that NBPT use is an effective and sustainable strategy to optimize nitrogen fertilization, increase productivity, and ensure greater economic viability in maize silage production.