Banca de DEFESA: LEONCIO GONÇALVES RODRIGUES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LEONCIO GONÇALVES RODRIGUES
DATA : 30/03/2022
HORA: 09:00
LOCAL: PLATAFORMA GOOGLE MEET
TÍTULO:

HYDROPONIC GROWTH IN NFT SYSTEM WITH AUTOMATION OF IRRIGATION, AS A FUNCTION OF AIR TEMPERATURE AND HUMIDITY, AS AN ALTERNATIVE FOR SEMI-ARID.

PALAVRAS-CHAVES:

Soilless cultivation, Arduino, Sustainable Development, Salinity.

PÁGINAS: 109
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

TThe semi-arid region of Brazil is heavily punished by recurrent droughts, with a large part of its soils with crystalline basement, which confers inferior quality to its subsoil waters. The use of irrigation in this region is not always feasible, due to limited water quantity or poor water quality and shallow soil conditions. Hydroponics, however, has no soil restriction and crops grown under hydroponic cultivation are more salinity tolerant, which allows for the use of more saline or brackish waters. Therefore, the objective of this research was to evaluate the performance of Crespa lettuce under different salinity levels of the solution (1.5, 2.0, 2.5, 3.0 and 3.5 dS m-1) in a hydroponic system NFT (Nutrient Film Technique) automated and alternative, and thus, verify to what level of salinity it is possible to economically explore this culture with saline or brackish waters. Three benches B1, B2 and B3 were built, divided into blocks BL1, BL2, BL3, BL4, BL5 with 5 treatments (A, B, C, D and E) and 4 repetitions, in a factorial scheme of 5 x 5 x 4 For the research, an automated system for irrigation was developed using Arduino and temperature and humidity sensors. Climatic data (Air Temperature and Humidity), physicochemical data of the nutrient solution water (EC, pH and Temperature), morphological data of the plant (Number of leaves, Stem diameter, Total fresh mass, Fresh mass of leaves and Fresh mass of roots). The germination of lettuce cv. Moana was 89.53%. The control of pH and EC is essential for the production of seedlings and plant growth in hydroponic cultivation, since they indicate the availability and amount of nutrients. The energy consumption proves to be lower than the system of fixed intervals. As for salinity, there was a significant difference at the level of 5% of probability for fresh leaf mass and total fresh mass between treatments, where the levels of 1.5 and 2.0 ds m-1 presented higher averages. It was concluded that the proposed automation system is a viable alternative, the alternative structure used was adequate, and that the lettuce for the conditions of the experiment does not present development at levels higher than 2.0 dS m-1.

MEMBROS DA BANCA:
Externo à Instituição - ALAN BERNARD OLIVEIRA DE SOUSA - UFC
Presidente - 1239724 - ANA CELIA MAIA MEIRELES
Interno - 1643899 - CARLOS WAGNER OLIVEIRA