Agricultura Tropical

URI Permanente desta comunidade

http://repositorio.ufes.br/handle/10/17346
Programa de Pós-Graduação em Agricultura Tropical

Centro: CEUNES
Telefone: (27) 3312 1701
URL do programa: http://agriculturatropical.ufes.br

Navegar

Navegando Agricultura Tropical por Assunto "aclimatação"

Agora exibindo 1 - 1 de 1
  • Nenhuma Miniatura disponível
    Item
    TECNOLOGIA DE APLICAÇÃO DE CARBONATO DE CÁLCIO NA APLICAÇÃO DE CAFÉ CONILON ASSOCIADO ÀS RESPOSTAS FISIOLÓGICAS
    (Universidade Federal do Espírito Santo, 2021-02-26) Soela, Débora Moro; Vitória, Edney Leandro da; https://orcid.org/0000-0002-2268-6037; http://lattes.cnpq.br/5385859254036142; https://orcid.org/0000-0003-4095-6114; http://lattes.cnpq.br/3522587129729190; Freitas, Ismael Lourenço de Jesus; https://orcid.org/0000-0002-8138-7846; http://lattes.cnpq.br/6767221056470832; Braga, Priscila da Conceição de Souza; https://orcid.org/0000-0001-5611-7089; http://lattes.cnpq.br/8365616280583760
    The coffee seedlings when they leave the nursery and are taken for planting in the field go through abiotic stresses, among them the excess of light. The application of calcium carbonate is a technique used to reduce the effects caused by these stresses. The objective of this work was to evaluate the application technology of calcium carbonate as a function of deposition and its efficiency through the physiological behavior of plants. The experiment was divided into two chapters, both with the same treatments, differentiating only the evaluations. Chapter 1 - the set of spray tips (BD 01, MGA 60º 1.0, MCP 1.5) and working pressure (206, 275, 344 and 413 kPa) that promote the best leaf coverage of calcium carbonate was evaluated in conilon coffee seedlings using the variables volumetric median diameter (DMV), droplet density (DEN) and cover (COB). The pressure at all ends influenced the coverage variable, as the pressure increases, the better the percentage of leaf coverage. The empty cone tip MGA 60ª at a pressure of 413 kPa promoted the best percentage of coverage of the evaluated product, therefore, the best option for application. Chapter 2 - the physiological responses of the seedlings were evaluated with and without application of calcium carbonate through the chlorophyll a fluorescence analysis of the BD 01 and MGA 60º tips and the pressure of 344 and 413 kPa. The interaction of the tip and spray pressure factors was not significant for the analyzed variables. The average test was performed differentiating only between plants that had calcium carbonate application (without acclimatization), and plants without application, but with acclimatization. Plants without application of calcium carbonate showed high values of energy dissipation flow (Dio / RC). The application of calcium carbonate promoted a better functioning of the photosynthetic apparatus in plants, confirmed by the best results of the FSII performance index (PIABS) and maximum photochemical efficiency of the FSII (Fv / Fm). The product promoted a photoprotection to light stress on plants.