What fertilizers are mainly used for summer topdressing? A full analysis of type selection
What fertilizers are mainly used for summer topdressing? Please explain that in summer, field crops are mainly topdressed with nitrogen fertilizer, while cash crops such as vegetables, tobacco, grapes, and cotton need potassium fertilizer in addition to nitrogen fertilizer. For example, for spring corn, use a one-time application of urea as the base fertilizer as a reference. Apply the other half of the urea as topdressing at the end of July and...
What fertilizers are mainly used for summer topdressing? Please explain
In summer, field crops are mainly topdressed with nitrogen fertilizer, while cash crops such as vegetables, tobacco, grapes, and cotton need potassium fertilizer in addition to nitrogen fertilizer. For example, for spring corn, use a one-time application of urea as the base fertilizer as a reference.
Apply the other half of the urea as topdressing at the end of July and the beginning of August. The nitrogen fertilizer use efficiency of the latter can be increased by 10%-20%. This shows that the use efficiency of nitrogen fertilizer topdressing is significantly higher than the application method of using all nitrogen fertilizer as base fertilizer. For summer topdressing of nitrogen and potassium fertilizers, trenches must be opened and covered with soil to avoid nitrogen volatilization loss caused by surface application of nitrogen fertilizer and potassium fixation in the surface layer caused by alternating wet and dry conditions.
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