1、 Fertilization in each period

Populus tomentosa needs more phosphorus at the seedling stage, so more phosphorus fertilizer should be applied. In the growing season, how much nitrogen fertilizer should be applied? It will stop growing every autumn. At this time, some potassium fertilizer should be applied

2、 Fertilization after seedling planting

For newly transplanted boxwood, more fertilizer should be applied in the early stage to supplement sufficient nutrients, but the concentration should not be too high to avoid damage to new roots. In the seedling growth period, the number and amount of fertilization should be increased at least once a month, which can be divided into wet application and dry application, and urea can be selected

3、 Fertilization method

When applying fertilizer to boxwood, the method of spraying can be adopted. The chemical fertilizer can be directly sprinkled on the seedling soil, and then the soil should be turned over. Or use ditch application, that is, dig a ditch in the seedling soil, put chemical fertilizer into the ditch, and then cover it with soil. It can also be applied wet, sprinkle chemical fertilizer on the surface of the soil, and then water it once to melt the fertilizer in time to avoid fertilizer damage