The antioxidants and secondary metabolites found in chicory (Cichorium intybus L.) are affected by biofertilizers, conventional fertilizers, and nano-fertilizers

Volume 26, Issue 2
Spring 2026
Pages 226-241

Document Type : Articles

Authors

1 Department of Horticulture and Landscape Engineering, College of Agriculture, Al-Qasim Green University, Babylon, Iraq.

2 Babylon University/college of science for women

Abstract
In winter 2024, a field study was conducted on the wild chicory plant (Cichorium intybus L.), a medicinal species having nutritional and pharmacological properties. A completely random design with four treatments was used to determine the effect of bio-stimulant application to leaves, traditional chemical fertilizers, and NPK nano-fertilizers on secondary metabolite production and antioxidant activity in the absence of information on how modern fertilization methods affect secondary metabolite production. All data were evaluated using one-way ANOVA and LSD at p < 0.05. The first treatment was water spraying (T0), the second utilized conventional NPK chemical fertilizer (T1), the third used NPK nano-fertilizer (T2), and the fourth used biostimulant (T3). Wild chicory beat water-only (T0) in all variables. The biostimulant (T3) treatment outperformed the wild plants in all chemical and physiological parameters. It had the most flavonoids (61.5 mg/g), phenols (197.8 mg/g), and alkaloids (1.89%). The test group had 192.1 mg/L glutathione, up from 137.7 mg/L in the control. T3 worked best at 500 mg/L and had the lowest IC50 value of 90.9 mg/L in the DPPH antioxidant experiment, outperforming the wild plant at 104.5 mg/L and vitamin C at 140.6 mg/L. Biostimulants and nanofertilizers enhance chicory's nutritional and medicinal value by improving secondary chemicals and antioxidant activity, offering a sustainable alternative to conventional fertilizers.

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