The scientific use of compound fertilizers produced by granulators to regulate soil fertility requires following the following steps:

1. Soil testing and analysis

Before applying compound fertilizer, it is recommended to conduct soil testing to understand the existing nutrient status and pH value of the soil. This can help determine the specific nutrient deficiencies in the soil and guide the rational allocation of compound fertilizers. Common soil testing indicators include nitrogen, phosphorus, potassium content, as well as organic matter and trace elements.

2. Choose the appropriate compound fertilizer

The formula for compound fertilizer should be selected based on soil testing results and crop requirements. Compound fertilizers generally contain three main nutrients: nitrogen, phosphorus, and potassium, and different crops have varying demands for these nutrients. You can choose compound fertilizers with high nitrogen content to promote leaf growth, or choose compound fertilizers with high phosphorus and potassium content to promote root development and improve stress resistance.

3. Reasonable fertilization amount

The amount of fertilizer should be determined based on the type of crop, soil conditions, and the content of compound fertilizer. In general, the application amount of compound fertilizer can be calculated according to the following method:

Base fertilizer application: applied before crop sowing or planting, usually based on 10-30 kilograms of compound fertilizer per acre.

Topdressing: Additional fertilization is applied during the growth period of crops, and is supplemented at specific stages of the growth period according to crop needs.

4. Fertilization method

Spread method: Spread compound fertilizer evenly on the surface of the earth, and then carry out plowing operations to mix it into the soil. Suitable for basal fertilizer application.

Strip or hole fertilization: Fertilization between rows or in holes of crops can reduce nutrient loss and improve utilization efficiency. Suitable for topdressing application.

Drip irrigation fertilization: Suitable for facility agriculture, the compound fertilizer is dissolved through the drip irrigation system and directly transported to the root area to improve fertilizer utilization efficiency.

5. Fertilization timing and frequency

Adjust the frequency and timing of fertilization according to the crop growth cycle. Usually applied in stages during the growth period to avoid excessive fertilization at once, which can lead to fertilizer waste or crop root burning. Especially nitrogen fertilizer, which is prone to loss or volatilization, should be applied in appropriate installments.

6. Precautions

Avoid excessive fertilization: Excessive application of compound fertilizers can cause soil compaction, nutrient imbalance, and water source pollution.

Timely irrigation: Proper irrigation after fertilization can help dissolve fertilizers and improve absorption efficiency.

Combining organic fertilizers: Regular application of organic fertilizers can improve soil structure, increase soil organic matter, and enhance the effectiveness of compound fertilizers.

Scientific use of compound fertilizers can not only increase crop yields, but also improve soil fertility, which is beneficial for soil health in the long run.