1、 Location of fertilization

How far it is from the root when applying fertilizer depends on the size of the plant. If it is a biennial plant, the distance should be 40 cm. Three year old plants should be 50 cm away. Those born for more than four years should be 80-100 cm away, that is, the longer the age, the farther the distance. Because the age is up to, the longer the root system extends, do not be too close, and it is easy to burn the root

2、 Depth of fertilization

In addition to paying attention to the location, we should also pay attention to the depth of fertilization. Fertilizer should be applied in the distribution layer according to the root distribution, so as to better absorb and play a role. When fertilizing, a ditch with a width of 30-40 cm and a depth of 40 cm can be dug, that is, the depth is about 40 cm. Too deep or too shallow will affect the absorption

3、 Selection of fertilizer

When fertilizing, the base fertilizer is usually pig manure, cow manure, duck manure, chicken manure, stable manure and other organic manure. In addition, the mobility of phosphate fertilizer is poor, so it is mostly applied together with base fertilizer, with 25-50 kg of calcium superphosphate per mu. If it is used continuously for many years, it can be stopped for one year. In the later stage, different kinds of fertilizer should be selected according to different growth periods. For example, in the budding stage, urea fertilizer can be applied. Before flowering, phosphate fertilizer and potassium fertilizer should be applied, which can promote flowering. Topdressing treatment should also be carried out after flowering. Compound fertilizer can meet the demand