Doutorado em Agronomia

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17349

Nível: Doutorado Acadêmico
Ano de início: 2010
Conceito atual na CAPES: 4
Ato normativo: Doutorado - 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=1440

Navegar

Navegando Doutorado em Agronomia por Autor "2º membro da banca"

Agora exibindo 1 - 2 de 2
  • Nenhuma Miniatura disponível
    Item
    Aproveitamento agrícola do biossólido gerado na estação de tratamento de esgoto de Jerônimo Monteiro - ES na laranjeira
    (Universidade Federal do Espírito Santo, 2024-11-26) Viçosi, Karen Andreon; Co-orientador1; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador2; https://orcid.org/; http://lattes.cnpq.br/; Orientador1; https://orcid.org/; http://lattes.cnpq.br/; https://orcid.org/; http://lattes.cnpq.br/; 1º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 2º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 3º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 4º membro da banca; https://orcid.org/; http://lattes.cnpq.br/
    Sewage sludge, known as biosolids after treatment, is a residue from sewage treatment that can be used in agriculture due to the presence of nutrients and organic matter. Its use in agroecosystems is justified to improve soil properties, increase microbial diversity and promote the circulation of nutrients, being an effective way to increase food production. Although the use of biosolids in agricultural production systems is a great option for reusing this material, this practice still needs to be controlled to be able to provide some risks, such as the presence of heavy metals, pathogens, organic compounds and toxins in excess, which can cause losses in agricultural practice. Another possibility for using biosolids is as a substrate for seedling production. It is capable of increasing the growth and improving the nutrition of seedlings, facilitating the lifespan and the cost of acquiring substrates. However, the physical attributes of biosolids may not be specific to all species, requiring tests to indicate an ideal proportion of biosolids in relation to the substrate. One of the treatments that sewage sludge can undergo is liming, and it is essential to understand the dynamics of soil pH with biosolids fertilization. Unlimed sewage sludge reduces soil pH after 21 days. However, in general, the application of 80 t ha-1 reduces pH by 4.8%, 9.9% and 9.6% for sandy, medium and clayey soils, respectively. Limed sewage sludge presents high soil reactivity after seven days, with a reduction in the occurrence of alkalinization over time. In general, for sandy soil, the pH value was around 7.6, while for medium and clayey soils the pH value was 7.4 at the dose of 80 t ha-1. Sandy textured soils with lower moderate capacity, selected from smaller doses of limed sewage sludge to reach pH 7. Based on these studies, the prediction of biosolids in seedling production and orange tree planning was then tested. Citrus farming is economically important in national agriculture, and also in the southern region of Espírito Santo. Biosolids have the potential to be used in the composition of substrate for the production of citrus rootstocks, replacing the commercial substrate. The use of biosolids in the proportion of up to 60% for Rangpur lime seedlings and up to 45% for ‘San Diego’ citrandarin seedlings promoted better responses in relation to initial growth and plant quality. In the field, biosolids can also be used for initial fertilization of the crop. The application of biosolids at doses of 100%, 115% and 150% of the N recommendation for the crop improved the chemical attributes of the soil, such as P, Ca, SB, CTC, effectiveness and base saturation. The levels of calcium, SB, t, V increased until 9 months, while organic matter increased until 11.7 months. In general, biosolids did not promote an increase in the content of micronutrients (Fe, Cu, Zn, Mn and B) in relation to mineral fertilization
  • Nenhuma Miniatura disponível
    Item
    Desempenho de genótipos de milho : tolerância salina, adubação, produtividade e bioatividade de Corymbia citriodora sobre Sitophilus zeamais
    (Universidade Federal do Espírito Santo, 2024-12-20) Marcos, Rodrigues Agostinho; Co-orientador1; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador2; https://orcid.org/; http://lattes.cnpq.br/; Orientador1; https://orcid.org/; http://lattes.cnpq.br/; https://orcid.org/; http://lattes.cnpq.br/; 1º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 2º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 3º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 4º membro da banca; https://orcid.org/; http://lattes.cnpq.br/
    Maize is a crop of food and economic importance worldwide, with the United States of America being the largest producers with 380,93 million tons and with a high average productivity of between 9 and 10 Ton/ha, exceeding 35 million, Brazil It is the second largest exporter and third largest producer of maize, behind only the United States and China. The State of Mato Grosso stands out with an average productivity of 6,338 kg/ha and production of 41,620,1 tons of grains, followed by Paraná, Goiás, Mato Grosso do Sul and Minas Gerais. The average productivity per maize area in the State of Espírito Santo is 2,955 kg/ha, ranking at the bottom. Among the problems that cause low maize production are inadequate fertilization management, the selection and planting of genetic materials susceptible to adverse environments (such as saline) and post-harvest pest infestation caused mainly by Sitophilus zeamais, responsible for grain losses and seeds. To prepare this research, 5 factorial experiments were prioritized, two (2) in the field and three (3) carried out in the laboratories of UFES-Alegre and Embrapa Milho e Sorgo. The objective of this research was to evaluate the physiological, morphological and productive performance of maize genotypes subjected to saline environment conditions, mineral fertilizer sources and alternative control of Sitophilus zeamais Motschulsky. The first chapter aimed to evaluate the effect of saline concentrations on seed germination and development of maize seedlings, and it was concluded that the best response to saline stress was obtained in the White genotype, in all variables evaluated. The second chapter evaluated the physiological and morphological behavior of maize genotypes in response to the application of mineral and organomineral fertilizers and it was concluded that fertilization with organomineral fertilizer provided similar responses when compared to complete fertilization - NPK. In the third chapter, the nutritional status and production of corn genotypes were evaluated based on the application of mineral and organomineral fertilizer, and it was concluded that the hybrid AG1051 and the varieties Branco, Roxo, Palha roxa and Vermelho showed higher grain productivity when they were fertilized with NPK. The fourth chapter aimed to evaluate the host preference of Sitophilus zeamais in stored maize seeds. And it was concluded that maize genotypes present different mechanisms of non-preference and oviposition by Sitophilus zeamais, with Roxo genotype standing out, which presented antixenosis resulting from the effect of nutritional properties and seed hardness. In the fifth chapter, the objective was to evaluate the effect of dosages of Corymbia citriodora powders on Sitophilus zeamais in the conservation of maize seeds and it was concluded that the interaction between Corymbia citriodora powders and genetic resistance of maize genotypes constitutes a sustainable strategy for efficient seed protection for family and organic farming