Potassium dihydrogen phosphate is a commonly used fertilizer known for its strong efficacy and excellent results. However, many people are unsure if zinc fertilizer can be used together with potassium dihydrogen phosphate. Let's explore this topic in detail.
Can Zinc Fertilizer Be Used with Potassium Dihydrogen Phosphate?
It is generally recommended not to use zinc fertilizer together with potassium dihydrogen phosphate. When zinc sulfate is added to a solution of potassium dihydrogen phosphate and stirred, the solution becomes cloudy and forms flocculent precipitates. This reaction negatively impacts the effectiveness of the fertilizer. Therefore, it is best to use them separately. However, potassium dihydrogen phosphate can be used with chelated zinc because chelated zinc is processed to have a protective layer around the zinc ions, preventing them from reacting with other elements, allowing the leaves to absorb it directly. If the product is not labeled as chelated zinc, ordinary zinc fertilizer should not be mixed with potassium dihydrogen phosphate.
What Fertilizers Should Not Be Used with Zinc Fertilizer?
1. Phosphate Fertilizers
Zinc fertilizer should not be mixed with phosphate fertilizers. Mixing them can form zinc phosphate precipitates, reducing the effectiveness of both zinc and phosphate fertilizers.
2. Alkaline Fertilizers
Zinc fertilizer should not be mixed with alkaline fertilizers. If mixed with lime, ash, ammonia water, or other alkaline fertilizers, the acidic and alkaline ions react, reducing the fertilizer's efficacy.
3. Pesticides
Zinc fertilizer should not be mixed with pesticides. Mixing zinc fertilizer with Bordeaux mixture, lime sulfur, or other alkaline pesticides also reduces its effectiveness.
Precautions When Using Zinc Fertilizer
1. Use Zinc Fertilizer Selectively
Do not use zinc fertilizer blindly. It is most effective on zinc-sensitive crops and zinc-deficient soils. Typically, if the soil's available zinc content is less than 0.5 mg/kg, zinc fertilizer application is beneficial.
2. Avoid Overuse
Excessive use of zinc fertilizer can be toxic to crops. It is important to use the appropriate amount.
3. Consider the Residual Effect
Zinc fertilizer has a long residual effect in the soil, so it does not need to be applied annually. Generally, it is sufficient to apply it every other year.
Conclusion
This guide explains whether zinc fertilizer can be used with potassium dihydrogen phosphate. They should not be used together, so it is important to pay attention when using these fertilizers.
