European Journal of Nutrition & Food Safety

Turmeric (Curcuma longa L.) is a crucial crop used for its therapeutic properties. In addition to curcumin, turmeric also contains anti-oxidants, flavonoids, alkaloids, poly-phenols, saponins, terpenoids, essential oils, and oleoresins. The season, varied biotic and abiotic stress conditions, growth stage, and concentration of different secondary metabolites all have an impact on the metabolic pathways that are in charge of the accumulation of related natural products. The goal of the current study was to standardize turmeric's growing stage for the prospective harvest of secondary metabolites. Six treatments made up the experiment, which included various harvesting stages from the fourth month following planting through maturity. Data were analysed using a completely random design. With maturation, there is an increase in secondary metabolites. The maximum potential harvest of secondary metabolites from shoot were observed in harvesting at seventh month after planting. According to the study, it was observed that the maximum curcumin, anti-oxidant activity, tannins Terpenoids, essential oil, and oleoresin of shoot (0.88%, 70.24%, 1.08%, 1.325%, 2.28% and 4.58%, respectively) was observed in harvesting at 7^th MAP. The maximum flavonoids, alkaloids and poly-phenols of shoot (0.85%, 0.763% and 0.755%, respectively) were observed in treatment harvesting at 8^th MAP.