Fruit trees are in the young stage, some as long as 1 ~ 3 years, some 3 ~ 5 months. This stage is mainly based on vegetative growth, which mainly completes the development of roots, branches, branches and crown skeletons. The nutrient supply is mainly nitrogen, phosphorus and potassium fertilizer. In this period, sufficient phosphate fertilizer and appropriate nitrogen and potassium fertilizer should be applied to promote the rooting of fruit trees and accelerate their growth and development.
In the fruiting period, the growth of fruit trees changed from vegetative growth to reproductive growth. At this stage, the demand for potassium is increasing, and phosphorus and potassium fertilizers should be applied to expand the crown and promote flower bud differentiation.
The proportion of potassium fertilizer application should be increased in the full fruit period.
Because it is necessary to meet the nutritional needs of branches and leaves growth and fruit growth in the fruiting period, it is necessary to pay attention to the coordinated application of nitrogen, phosphorus, potassium fertilizer and medium and trace element fertilizer in this period. Therefore, if there are insufficient trace elements in the soil, it is likely that there will be element deficiency of medium and trace elements in the full fruit period, and it must be supplemented in a timely and appropriate manner according to the actual situation of the soil and the needs of fruit trees.
In the aging period, with the weakening of the vegetative growth of fruit trees, in order to delay its decline, we should do a good job in fertilizer and water management in the orchard in combination with tree regeneration, increase the application of organic fertilizer and nitrogen fertilizer, so as to promote the recovery of vegetative growth, promote regeneration and rejuvenation, and extend the fruiting period and full fruiting period.