The method for applying potash fertilizer to Chinese cabbage is:
Shiji
For Chinese cabbage production of more than 10,000 kilograms, 300-500 kilograms of refined organic manure or 300 kilograms of dried chicken manure and 3 cubic meters of straw manure should be used per mu and then applied to compound fertilizer (with a N, P, and K content of more than 35%). Sacreful potassium sulfate compound fertilizer with 30-40 kg. The above two fertilizers can be applied and mixed. Nitrogen fertilizer (46% of urea, 15 kg), phosphate fertilizer (14% of calcium superphosphate, 30 kg), and potassium fertilizer (50% of potassium sulfate, 12 kg) were used as compound fertilizer without compound fertilizer. It is best to concentrate on ditching, ridge up with soil, and sow cabbage seeds on ridges.
â– Topdressing
Cabbage needs the fertilizer to account for more than 60% of the total amount of fertilizer needed during the entire growth period. In addition to applying two topdressing nitrogen fertilizers (urea 20-25 kg) during this period, another 5-7 kg of potassium sulfate is applied topically. The ridges are ditched and covered with water.
â– Foliar spraying
The 0.2% potassium dihydrogen phosphate can be sprayed from the rosette stage to the ball stage of the Chinese cabbage, sprayed once every 7-10 days, and sprayed three times in total. When spraying, it is best to be in the morning, evening or cloudy all day.
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