What chemical fertilizer is good for apple trees in autumn?

Total nutrition and basal fertilizer application in autumn are the key periods of field management in the later stage of orchard. Applying base fertilizer to orchard in autumn can not only improve soil and increase tree nutrients, but also promote flower bud differentiation and increase fruit setting rate and yield in the coming year. According to statistics, applying 70% of the fertilizer needed in orchard in autumn at one time has obvious effect of improving quality and increasing production. Fertilization of fruit trees should be carried out as soon as possible after the Millennium and before the first frost, starting from the solar term fertilization of the Millennium. After unloading the apples, pay close attention to fertilization. The same fertilizer, autumn is far better than spring! In order to improve the storage nitrogen level of trees and promote the growth and development of next year. At this time, the temperature is high, the rainfall is abundant, the base fertilizer has enough time to warp, the leaf function has not declined, and it has strong photosynthetic function, and nutrients flow back to the roots, because the autumn shoots of fruit trees stop for a long time around mid-September, and the roots enter the peak growth period. At this time, the root system of fertilized fruit trees absorbs the most and the utilization rate of base fertilizer is the largest. In the case of shortage of organic fertilizer, it is suggested to use commercial organic fertilizer and apply total nutrient base fertilizer in autumn: the trinity model of bio-organic fertilizer+compound fertilizer+medium and micro fertilizer, which lays the foundation for the healthy growth of fruit trees. Interaction, fertilization once, nourishing life, cleverly supplementing calcium, boron and potassium during the growth period.

Fertilization amount/time should be appropriately adjusted according to the age of trees, the growth and load of fruit trees.

Principle: Apple 15 years old and above special series "Wuji Feng" bio-organic fertilizer 10- 13kg/ plant +3 15 compound fertilizer+0.5kg/ plant.

After precipitation and fertilization in late autumn, it can effectively prevent dry rot! Dig a big ditch for deep application of chemical fertilizers, put all kinds of chemical fertilizers into the ditch, and mix the chemical fertilizers with the ditch soil.

Tips:

In this paper, it is mentioned that the fruit trees with weak "growth" or old, weak, sick and disabled should be applied with base fertilizer and trimmed at the first time after the Millennium. Normal fruit trees can be delayed until the leaves fall off, not later.