What are the precautions for applying potassium fertilizer?
What should be noted when applying potassium fertilizer? What does potassium fertilizer do? Please note the following when applying potassium fertilizer: 1. Pay attention to soil conditions. Generally, when soil available potassium is below 80mg/kg, the effect of applying potassium fertilizer is obvious; when soil available potassium is 80-120mg/kg, apply less or none. In addition, sandy soil available...
What should be noted when applying potassium fertilizer? What does potassium fertilizer do? Please introduce
When applying potassium fertilizer, note the following:
1. Pay attention to soil conditions. Generally, when soil available potassium is below 80mg/kg, the effect of applying potassium fertilizer is obvious; when soil available potassium is 80-120mg/kg, apply less or none. In addition, sandy soil tends to have lower available potassium, so potassium fertilizer should be applied more; clay soil tends to have higher available potassium, so it can be applied less or not at all.
2. Look at the crop variety. For potassium-loving crops such as legumes, root and tuber crops, sugar beet, potato, watermelon, fruit trees, and cash crops such as cotton and hemp, potassium fertilizer needs to be increased, and the yield increase effect is obvious; for crops with lower potassium needs, application should be done with caution.
3. The timing of potassium fertilizer application should be reasonable. In a winter wheat and summer maize rotation, potassium fertilizer should be applied preferentially to maize, because the yield-increasing effect of potassium application on maize is higher than on wheat.
4. The potassium fertilizer variety should be applied reasonably. For fruit trees, tobacco, and sugar crops, potassium sulfate is better; for fiber crops, potassium chloride is suitable; for general field crops, except for a few chlorine-sensitive crops, the cheaper potassium chloride can be applied.
5. The amount of potassium fertilizer should be reasonable. Although potassium fertilizer has many benefits for crop production, excessive application is also harmful: excessive potassium application not only wastes valuable resources, but also reduces crop uptake of calcium and other cations, causing "heart rot" in leafy vegetables and "bitter pit" in apples, and can also cause soil environment and water pollution, weakening crop production capacity.
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