Compound fertilizer is most effective when used as a base fertilizer. The application method involves incorporating the compound fertilizer—containing balanced amounts of nitrogen, phosphorus, and potassium—into the soil at a specific depth before sowing. The ideal depth varies depending on the crop type. For grain crops and vegetables, it's typically around 20 cm, while fruit trees require deeper placement, usually between 30 to 40 cm. Applying fertilizer at the correct depth ensures that nutrients are available to the plant throughout its growth cycle.
Most of the phosphorus and a significant portion of potassium required during the growing season are provided through basal application. However, nitrogen, being highly mobile, should not be over-applied in the form of compound fertilizer. At least half of the nitrogen should be applied later as a top dressing during the plant’s active growth phase to avoid loss and ensure efficient uptake.
The nutrient ratio in any compound fertilizer is fixed, so when determining the base fertilizer rate, it's common to calculate based on the phosphorus or potassium content. This means that part of the nitrogen needs to be supplied separately as a top dressing in the mid to late stages of growth.
Compound fertilizers are generally not recommended for foliar application or water-soluble irrigation. Even if the phosphate component is fully soluble, it tends to remain near the soil surface and isn't easily taken up by the root system. In some regions like Guangdong, vegetable farmers sometimes use imported 45% (15-15-15) compound fertilizer dissolved in water for leafy vegetables, but this practice often results in low nutrient efficiency. It leads to wasted fertilizer, increased costs, and poor returns, indicating a need for better application methods and more tailored nutrient management.
Led Curing Devices,Led Light Curing,Led Light Curing Machine,Led Curing Device
Rolence Enterprise Inc. , https://www.rolencedent.com