Seasonal variations in nutrient elements in leaves and fruits of four grapefruit varieties

Seasonal dynamics in macro and micronutrient concentrations were evaluated in leaves, peel and pulp of four grapefruit varieties viz. Marsh Seedless, Flame, Rio Red and Red blush, grown at Punjab Agricultural University, Fruit Research Station – Jallowal, Jalandhar, Punjab, India. Significant variations in nutrient concentrations at specific growth and development stages were observed in different grapefruit varieties. Leaves of grapefruit varieties recorded higher concentration of nutrients followed by peel, while pulp contained minimum nutrient accumulation. With the progression of season, most of the nutrient elements were observed to increase in leaves of grapefruit varieties. N and P were observed to be higher in fruit peel while K, Ca, Mg and micronutrients were found to be higher in fruit pulp.