Physicochemical Quality of Potato Chips As A Function of Suppression of Irrigation and Fertigation

Objective: The aim of this study was to evaluate physicochemical changes in var. JB 2601 chip-type function for suppression of irrigation and fertigation in Jaboticabal, SP, Brazil. Theoretical Framework: The potato, originally from the Andes, is the fourth most produced food in the world. In 2021, Brazil cultivated 115,925 ha, with 3.7 million tons. Drip irrigation improves productivity and quality, while proper nutrition is crucial to avoid reducing quality. However, water scarcity and the high cost of fertilizers are challenges for production, aggravated by climate change (BESHARAT, 2020). Method: The experiment was carried out at the Teaching, Research and Extension Farm of UNESP, in Jaboticabal, SP, Brazil, in a Latoxisol A randomized block design with 6 replications was used, evaluating three irrigation suppressions (80, 90 and 100 DAP) and two levels of fertigation. Planting was manual on 06/15/2020, with drip irrigation management. Physicochemical variables of the tubers after harvesting at 94, 104 and 114 DAP were evaluated, with statistical analysis by ANOVA and Tukey's test at 5% probability. Results and Discussion: The interaction between irrigation suppression (SI) and fertigation (F) significantly affected yield, soluble solids, total acidity and tuber maturation index (p<0.01). Irrigation suppression impacted pH, firmness, and ash composition. Yield was similar between F1 and S1 treatments, but early soil drying affected the results. The increase in the duration of SI reduced the total acidity and the maturation index, indicating an influence on the quality of the tubers. Research Implications: This thesis highlights the growing concern of society in relation to environmental issues, especially in the face of adverse climatic events and the irregular distribution of precipitation throughout the year. Originality/Value: The results are relevant to the potato production sector, offering insights for effective irrigation and fertilization management strategies. These sustainable practices can contribute to food security, preservation of natural resources, and meet the growing global demand for energy and carbohydrates.