Alga calcária, bioinsumos, carbonato de cálcio, Lactuca sativa L
Name: TALYS MORATTI LÊMOS DE OLIVEIRA
Publication date: 19/11/2024
Examining board:
Name |
Role |
|---|---|
| ANTELMO RALPH FALQUETO | Examinador Interno |
| SARA DOUSSEAU ARANTES | Presidente |
| TÚLIO SILVA LARA | Examinador Externo |
Summary: Advancements in hydroponic technology have significantly boosted agriculture by providing greater efficiency, sustainability, and productivity. Optimized systems such as NFT, DWC, and aeroponics, combined with vertical farming, enable more rational space utilization and improved nutrient delivery. The integration of technologies like IoT and machine learning allows real-time
monitoring of critical parameters, optimizing resources and significantly reducing water consumption. Additionally, the use of balanced nutrient solutions, coupled with precise control of pH, electrical conductivity, and temperature, ensures efficient nutrient absorption. However, the reliance on chemical fertilizers compromises the environmental sustainability of these systems. Alternatives such as organic hydroponics and the use of wastewater as nutrient sources have been explored to enhance sustainability. In this context, biostimulants emerge as a promising and environmentally viable approach, improving nutrient uptake efficiency in plants and aiding their adaptation to changing environmental conditions. Among potential biostimulants, Lithothamnium sp. stands out as a calcareous alga widely used in agriculture as a mineral fertilizer. Recent studies suggest that Lithothamnium exhibits biostimulant properties with positive impacts on the development of various crops, including enhanced nutrient absorption and increased resistance to abiotic stress. However, the mechanisms through which this alga acts as a biostimulant remain incompletely understood, highlighting the need for further research to elucidate its functional role and optimize its use in agricultural systems, particularly in hydroponics. Exploring these effects could represent a significant advancement in improving the sustainability and efficiency of modern agricultural production systems. This study, divided into two chapters, addresses nutritional technologies in hydroponic lettuce cultivation. The first chapter consists of a literature review discussing the importance of nutrient solutions and the role of biostimulants in successful lettuce production. The second chapter evaluates the effects of Lithothamnium sp. compared to other calcium carbonate sources in hydroponic cultivation, analyzing its interaction with the crisp lettuce cultivars 'Mônica' and 'Veneranda.' The review highlighted that biostimulants
have positive effects on germination, root and shoot growth, productivity, and post-harvest longevity. However, it also emphasized the need for further studies on the use of biostimulants in hydroponic lettuce cultivation. Experimental results
indicated that calcium carbonate supplementation increased dry mass accumulation in leaves and roots but altered the nutritional balance and reduced the photosynthetic efficiency of the plants. These findings underscore the importance of adjusting nutritional management practices to maximize the efficiency and sustainability of hydroponic cultivation.
