High nitrogen compound fertilizer+urea;
Organic fertilizer;
1, urea has the disadvantage of fast seedling raising and single nutrient, which 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 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;
10㎝ Dig a hole from the root for topdressing, or use a topdressing device for topdressing, with good fertilizer efficiency.