Standardization of Nutrient Requirement for Enhancing Yield and Quality in Grape (Vitis vinifera L.) Var. Red Globe

Grape is one of the important fruit crops grown for its refreshing and nutritious berries. Adequate nutrition is very important for grape cultivation as it directly reflects in the yield and quality of the crop. A field experiment was conducted in the College orchard, TNAU, Coimbatore to standardize the nutrient requirement for the grape variety Red Globe. The experiment consisted of thirteen treatments with varying levels of N (100, 150, 200 g/vine) and K (150, 300, 450, 600 g/ vine) without altering P levels and was laid out in randomized block design with three replications. The results revealed that application of 30 kg FYM + 100:150:150 g NPK/vine (T2) improved the yield/vine (17.25 and 15.51 kg) by increasing the number of bunches per vine (23.00 and 20.13) with optimal bunch weight (750.0 and 770.3 g) in summer and winter season crops respectively. However, the application of 30 kg FYM + 150:150:450 g NPK/vine (T9) improved the quality parameters viz., total soluble solids (17.84 and 17.59 °Brix), reducing sugars (15.65% and 15.55%) and total sugars (17.22% and 17.76%) along with a decrease in acidity (0.48 and 0.49%).