Application Methods of Potassium Fertilizer in Vegetable Cultivation
There are many types of potassium fertilizer, and different types have different application methods. Commonly used potassium fertilizers include potassium chloride, potassium sulfate, potassium-magnesium fertilizer and plant ash. Potassium chloride and potassium sulfate are physiologically acidic fertilizers and should be applied together with lime and organic fertilizer. For chlorine-sensitive crops such as potatoes, potassium chloride and potassium-magnesium fertilizer with high chlorine content should not be applied...
There are many types of potassium fertilizer, and different types have different application methods.
Commonly used potassium fertilizers include potassium chloride, potassium sulfate, potassium-magnesium fertilizer and plant ash. Potassium chloride and potassium sulfate are physiologically acidic fertilizers and should be applied together with lime and organic fertilizer. For chlorine-sensitive crops such as potatoes, potassium chloride and potassium-magnesium fertilizer with high chlorine content should not be applied.
Potassium-magnesium fertilizer is suitable for acidic soil. Plant ash is suitable for vegetable seedling raising, as it both supplies nutrients and absorbs heat to raise the soil surface temperature, promoting early seedling growth. In addition, using a 1% plant ash extract as a foliar topdressing also has a good effect on controlling vegetable aphids.
According to experiments, hole application, furrow application and band application are more effective than broadcast application. Generally, potassium should be applied about 10cm from the vegetable roots; this way, the roots can be protected from burning while the plant's uptake of potassium is also promoted.