What fertilizer is used for seedling raising?

Nitrogen fertilizer and trace element fertilizer can be used to raise seedlings. The application of trace element fertilizer in the later stage of crops is beneficial to the balanced absorption of crop nutrients and the vigorous growth of seedlings. After using fertilization, it should be managed in time and watered in time. For example, urea can be used to raise corn seedlings; High nitrogen compound fertilizer+urea; Organic fertilizer; 1, urea seedling is fast, but the disadvantage is that the nutrient is single and can not meet the growth of unfertilized corn; 2. High nitrogen compound fertilizer+urea can raise seedlings and increase phosphorus and potassium fertilizer. Disadvantages, increased cost, not green food; 3. Organic fertilizer. Can supplement nitrogen, phosphorus, potassium and trace elements, is green and environment-friendly, and has long fertilizer effect. Disadvantages. The investment is large, the usage per mu is large, and the effect is not obvious without it; Top dressing with 10_, which is far away from the roots, or top dressing with a top dressing device has good fertilizer effect.