NPK compound fertilizers are the “nutrient suppliers” for crop growth, but excessive application will only backfire, disrupting nutrient balance and leading to abnormal crop growth, reduced quality, or even death. Even with high-quality products produced using standard NPK compound fertilizer granulation technology and professional fertilizer granulators, excessive application can still cause irreversible damage. There are four common types of harm:

First, excessive vegetative growth, leading to lodging and disease. Excessive nitrogen fertilizer causes crops to grow excessively tall and weak, making field crops prone to lodging; and the overly vigorous growth leads to poor ventilation and light penetration, easily triggering aphid infestations, powdery mildew, etc., increasing management costs.

Second, flower and fruit drop, and reduced quality. Excessive phosphorus and potassium inhibit the absorption of calcium and boron, leading to flower and fruit drop, low fruit setting rates, and problems such as deformed fruits, poor taste, and a significant decrease in market value.

Third, root damage and reduced absorption. Excessive application increases soil osmotic pressure, leading to “root burn,” manifested as blackened and rotten roots, preventing normal water and nutrient absorption, resulting in yellowing and wilting leaves, and in severe cases, the entire plant wilting and dying.

Fourth, reduced stress resistance and increased susceptibility to disasters. Excessive fertilization disrupts the crop’s growth rhythm, reducing its resistance to cold, drought, and waterlogging.  Crops are more susceptible to damage during extreme weather events and are difficult to recover afterward.

In short, fertilization should be done “as needed.” Even when using high-quality granular fertilizers produced by NPK fertilizer production lines, the amount of fertilizer applied must be controlled to avoid over-fertilization, thereby ensuring healthy crop growth, improved quality, and increased yield.