The Impact of Biofortified Vermicompost on Enhancing Nutritional Quality, Micronutrient Content, and Antioxidants in Carrot (Daucus Carota Cv Surbhi)

Abstract

Purpose: Beneficial soil microbes are pivotal players in the intricate dance of nutrient cycling. Their abundance in the soil and its nutrient reservoir hinges on the soil’s structure and functions, influencing nutrient mobilization and uptake. This study explores the effects of biofortified vermicompost on improving the nutritional quality, micronutrient content, and antioxidants in carrots. By analyzing the influence of this formulation on the growth and development of carrots, we aim to shed light on its potential benefits for enhancing the overall health benefits of this popular vegetable. Methods: Carrots were cultivated in pots under nine different treatments, with vermicompost biofortified using various combinations of three beneficial microbes: Trichoderma harzianum, Bacillus subtilis, and Pseudomonas fluroscence, along with a control. Results: The results of the study revealed that the combination of T. harzianum and B. subtilis produced the most significant results (p < 0.05) across all parameters tested, including micronutrient content in carrot root (Fe, 77.65 ± 0.65 mg kg− 1) Cu (12.67 ± 0.12 mg kg− 1) and in soil Mn (18.13 ± 0.07 mg kg− 1), Zn (28.43 ± 0.08 mg kg− 1), antioxidant activity, and biochemical analysis. Following closely behind was the combination of B. subtilis and P. fluroscence where the treatment has shown best in micronutrient content of carrot root (Zn, 51.84 ± 2.48 mg kg− 1) and soil (Fe, 20.12 ± 0.03 mg kg− 1and Cu, 8.71 ± 0.40 mg kg− 1). Conclusions: Positive outcomes in all the parameters have been observed when beneficial microorganisms were recruited along with vermicompost in combination with different microorganisms and using the microorganisms individually, suggesting a strong correlation between plant-microbe interactions and improving the overall quality of carrots. © The Author(s) under exclusive licence to Sociedad Chilena de la Ciencia del Suelo 2025.