Influence of sulphur and trace elements on rasa-guna-based growth parameters of garlic (Allium sativum L.)

Abstract

The growth and quality of garlic (Allium sativum L.) are influenced not only by macronutrient fertilization but also by sulphur (S) and a suite of trace elements that regulate plant metabolism. This paper evaluates graded rates of sulphur (0, 50, 100, 150 kg ha⁻¹) with/without foliar trace‑element supplementation (Zn, Mn, Cu, Fe) and interprets responses through a Rasa‑Guna lens. Results indicate an optimum around 100 kg S ha⁻¹, with trace‑element supplementation amplifying gains in bulb weight, yield, chlorophyll, allicin content, and storage‑life. The study bridges classical qualitative descriptors (rasa, guna) with modern plant nutrition, offering an integrated nutrient‑management strategy for garlic.