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Efeitos da aplicação de ozono em cultura de tomate em hidroponia
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Advisor(s)
Abstract(s)
O presente estudo teve como objetivo verificar os efeitos benéficos da aplicação de ozono
por irrigação e pulverização na cultura do tomate (Solanum lycopersicum L.) em hidroponia,
com avaliação do crescimento e estado vegetativo das plantas, produtividade e qualidade
dos frutos. Adicionalmente, foi ainda, avaliada a capacidade de desinfeção e limpeza da
água do sistema de rega, através da aplicação de ozono.
Dada a crescente necessidade de se desenvolverem práticas e alternativas mais
ecológicas e sustentáveis no setor agrícola, o ozono (O3) surge como uma alternativa que
visa melhorar o sistema radicular das plantas, expansão da sua área foliar, fitossanidade
resultando numa melhor qualidade dos frutos e produtividade.
Foram testadas sete modalidades com diferentes variáveis: duas modalidades com
aplicação de ozono na irrigação, uma com adubação a 100%, e outra a 50%, ambas com
aplicação de fungicida (IO3+Ft100%+Fg e IO3+Ft50%+Fg); outra modalidade com
aplicação de ozono na irrigação com adubação a 100% e pulverização com ozono
(IO3+Sp.O3+Ft100%); uma outra apenas com aplicação de ozono por pulverização e
fertilização a 100% (Sp.O3+Ft100%); os controles não tiveram qualquer tipo aplicação de
ozono, variaram entre si apenas na percentagem de fertilização, 50% e 100%, e na
aplicação ou não de fungicida (Controle/Ft50%+Fg; Controle/Ft50%-Fg e
Controle/Ft100%+Fg).
A avaliação dos parâmetros de desenvolvimento das plantas foi realizada aos 20, 50, 70,
100 e 120 dias após plantação. A avaliação dos parâmetros de qualidade dos frutos e do
sistema radicular das plantas foi realizada no final do ensaio.
Os resultados mostraram que a aplicação de ozono tem efeitos benéficos no
desenvolvimento das plantas, resultando num maior peso dos frutos por planta e numa
maturação mais homogénea, com mais de 42% de frutos maduro.
Apesar de não se terem verificado melhorias significativas nos parâmetros de qualidade
dos frutos, também não se verificaram perdas de qualidade dos frutos. Indicando, assim,
que a aplicação de ozono nas plantas por irrigação e/ou pulverização não teve efeitos na
qualidade. O presente ensaio permitiu, ainda, verificar o efeito benéfico do ozono na
desinfeção e limpeza dos sistemas de rega, mostrando ser uma mais-valia no setor
agrícola, melhorando a fitossanidade das culturas e limpeza dos sistemas de rega.
The objective of the present study was to verify the beneficial effects of the ozone application by irrigation and spraying on the tomato (Solanum lycopersicum L.) crop in hydroponics, with evaluation of plant growth and vegetative state, yield and fruit quality. Additionally, the ability to disinfect and clean the irrigation system with the application of ozone was also evaluated. Given the growing need to develop more ecological and sustainable practices and alternatives in the agricultural sector, ozone (O3) appears to be an alternative that aims to improve the root system of plants, expansion of the leaf area and plant health, which will result in better fruit quality and yield. Seven modalities with different variables were tested, two modalities with ozone application in irrigation, one with 100% fertilization, the other at 50%, with fungicide application (IO3+Ft100%+Fg e IO3+Ft50%+Fg); another modality with the application of ozone in irrigation with 100% fertilization and spraying with ozone (IO3+Sp.O3+Ft100%); another modality with only application of ozone by spraying and 100% fertilization (Sp.O3+Ft100%); the controls did not have any type of ozone application, they varied among themselves only in the fertilization percentage, 50% and 100%, and in the application or not of fungicide(Control/Ft50%+Fg; Control/Ft50% -Fg e Control/Ft100%+Fg). The evaluations of plant development parameters were performed at 20, 50, 70, 100 and 120 days after planting. The evaluations of fruit quality parameters and plant root system were performed at the end of the trial. The results showed that the application of ozone has beneficial effects on plant development, resulting in greater fruit weight and more homogeneous maturation, with more than 42% of ripe fruit. Although there were no significant improvements in fruit quality parameters, there were no losses in fruit quality either. This indicates that the application of ozone to plants by irrigation and/or spraying does not have negative effects on the quality of tomato fruits. This test also allowed to verify the beneficial effect of ozone in the disinfection and cleaning of irrigation systems, proving to be an asset in the agricultural sector, improving the plant health of crops and irrigation systems
The objective of the present study was to verify the beneficial effects of the ozone application by irrigation and spraying on the tomato (Solanum lycopersicum L.) crop in hydroponics, with evaluation of plant growth and vegetative state, yield and fruit quality. Additionally, the ability to disinfect and clean the irrigation system with the application of ozone was also evaluated. Given the growing need to develop more ecological and sustainable practices and alternatives in the agricultural sector, ozone (O3) appears to be an alternative that aims to improve the root system of plants, expansion of the leaf area and plant health, which will result in better fruit quality and yield. Seven modalities with different variables were tested, two modalities with ozone application in irrigation, one with 100% fertilization, the other at 50%, with fungicide application (IO3+Ft100%+Fg e IO3+Ft50%+Fg); another modality with the application of ozone in irrigation with 100% fertilization and spraying with ozone (IO3+Sp.O3+Ft100%); another modality with only application of ozone by spraying and 100% fertilization (Sp.O3+Ft100%); the controls did not have any type of ozone application, they varied among themselves only in the fertilization percentage, 50% and 100%, and in the application or not of fungicide(Control/Ft50%+Fg; Control/Ft50% -Fg e Control/Ft100%+Fg). The evaluations of plant development parameters were performed at 20, 50, 70, 100 and 120 days after planting. The evaluations of fruit quality parameters and plant root system were performed at the end of the trial. The results showed that the application of ozone has beneficial effects on plant development, resulting in greater fruit weight and more homogeneous maturation, with more than 42% of ripe fruit. Although there were no significant improvements in fruit quality parameters, there were no losses in fruit quality either. This indicates that the application of ozone to plants by irrigation and/or spraying does not have negative effects on the quality of tomato fruits. This test also allowed to verify the beneficial effect of ozone in the disinfection and cleaning of irrigation systems, proving to be an asset in the agricultural sector, improving the plant health of crops and irrigation systems
Description
Dissertação de Mestrado na área da Engenharia Agronómica, apresentada na Escola Superior Agrária de Santarém
Keywords
Hidroponia Solanum lycopersicum Tomate Ozono Produtividade Qualidade Tomato Hydroponics Ozone Productivity Quality
Citation
Santos, Nuno Miguel Ferreira dos (2022). Efeitos da aplicação de ozono em cultura de tomate em hidroponia. Dissertação apresentada para obtenção do grau de Mestre na área de Engenharia Agronómica, na Escola Superior Agrária de Santarém. 49p. Disponível em: http://hdl.handle.net/10400.15/4033