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2. Promote balanced fertilization
Organic fertilizer, NPK and trace element fertilizers should be applied together. Appropriately reduce the amount of nitrogen and phosphorus fertilizer, supplement potassium fertilizer, and apply trace elements such as boron, zinc and molybdenum.
3, the selection of suitable fertilizer varieties is best to use less chemical fertilizers, do not excessive application of ammonium nitrogen fertilizer and ammonium nitrate fertilizer, advocate the use of low nitrogen high concentration compound fertilizer.
4, fertilization to achieve appropriate amount of chemical fertilizers should not be used too much, ammonium bicarbonate less than 25 kg / acre, ammonium sulfate less than 15 kg / acre, urea less than 10 kg / acre, superphosphate less than 25 kg / acre. When applying fertilizer, you should use less diligence.
5. Advocate deep application of fertilizer or ditch application of soil to protect fertilizer, reduce volatilization loss, reduce direct damage to seedlings, and not apply chemical fertilizer. The point should be more than 10 cm from the root of the crop. It is necessary to apply the soil deeply and water it after applying it.
6, the occurrence of fertilizer damage, timely watering diluted leaf surface sprayable compound microbial fertilizer 500 times liquid, the effect is better.
Technical points for preventing crop damage
1. Adding fully decomposed organic fertilizer Fresh organic farmyard fertilizer can be applied after it is fully decomposed. Adding organic fertilizer can improve soil structure, reduce fertilizer dosage and reduce salt damage.
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