Agronomic Performance of Lettuce Grown in A Greenhouse in The Federal District Under Different Levels of Magnetic Induction and Three Irrigation Depths

Objective: The objective of research into the use of magnetically treated water in irrigated agriculture is to reduce the amount of water used while maintaining productivity and product quality. Theoretical Framework: Lettuce stands out among the most consumed and produced vegetables in Brazil. Studies show that magnetically treated water undergoes physical and chemical changes. Method: The experiment was carried out in a greenhouse at Fazenda Água Limpa (FAL), belonging to the University of Brasília (UnB). The different levels of magnetic induction adopted were: T1 – 0.28 Tesla (T); T2 – 0.229T; T3 – 0.029T; T4 – 0 T (control), applied in irrigation, using two depths, 50% and 100% of crop evapotranspiration. Results and Discussion: The different treatments responded significantly to the variables nitrogen, phosphorus, magnesium, sulfur, iron, copper, zinc, crude protein, plant height and diameter. Research Implications: The results indicate that by using the magnetization of water applied in irrigation, it is possible to reduce the amount of water applied without harming nutritional and productive aspects of the crop. Originality/Value: This study contributes to the literature by bringing an innovative and still little studied approach to a technique that can be applied to irrigation. The relevance and value of this research are evidenced by addressing the reduction of water resources applied in agriculture.