Quality Responses of Sweet Pepper Varieties Under Irrigation and Fertilization Regimes

Abstract

Red sweet peppers are economically important since they are widely farmed and consumed worldwide. As a high-value crop, it has a significant impact on the horticulture economy. This study aimed to improve the quality of sweet pepper fruits (total polyphenols; chlorophyll A and B; lycopene, β-carotene, tannins, ABTS, DPPH, protein and 15N) using three hybrids—Kornelya F1, Kaptur F1 and Napoca F1—four fertilization methods (chemical, organic, biologic and unfertilized), and two irrigation regimes (5200 and 7800 m3·ha−1, respectively). The results revealed substantial similarities between organic and conventional management practices. From a genetic point of view, ‘Kornelya’ cultivar reacted well with most compounds with antioxidant effects. This study revealed that peppers react positively when subjected to hydric and nutrient stress, with the fruits having the highest values for total polyphenols, chlorophyll A and B, lycopene, ABTS, and DPPH. Following the interactions between factors, ‘Kornelya’ reacted positively to organic and unfertilized methods with an irrigation regime of 5200 m3·ha−1.