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Timing of High-Potassium Fertilizer Application for Grapes and Analysis of Grape Potassium Content
Abstract Timing of potassium fertilizer application for grapes: After fruit set and until the veraison stage, a monopotassium phosphate solution can be sprayed on the leaves, once every 7-15 days, for 2-3 consecutive applications, with spraying times before 9 AM and after 5 PM. Grapes have a relatively high potassium content, with 104-151 mg of potassium per 100 g of grapes.