Effect of Potassium on Growth, Yield and Quality Character of Grapes

An experiment was conducted to find out the "Effect of potassium on growth, yield and quality characters of grapes cv. Muscat". The potassium fertilizer was given as soil application and foliar spray in the form of Sulphate of potash (SOP) at 0, 200, 400, 600, 800, 1000 grams/vine, and also 600 grams + 0.5% of foliar spray, 600 grams + 1% of foliar spray application at pea and marble stage application is done to find the response of potash on grapes. There is a need to develop well-calibrated soil nutrient management in vineyard for maximising yield and quality of grapes. The potassium application as 600 grams along with 0.5% foliar spray shows the best results in leaf area index, total chlorophyll, total sugars, reducing sugars, non reducing sugars, juice content, total soluble solids, pH of juice and least acidity level was observed and this treatment also obtain the maximum diameter of berries, length and width of bunch than other treatments. It shows the maximum yield of (27.37 t/ha) and also enhances the shelf life by retaining grape berries in the stalk for about 9 days from harvest.