The walnut tree begins to grow roots each time, laying the foundation for the growth and development of the above-ground part, and there are several growth peaks throughout the year. According to this principle, the management of fertilizer and water in early spring flowers should be done well.

1, to apply base fertilizer: walnut trees in the early spring buds before sprouting, the root activity to grow, until the bud to shoot when stopped, time in March to early April, must be completed before the end of March Schiff's fat task.

2, to promote flower fruit fertilizer to promote: After the growth of walnut trees to stop growing fast to fruit fast-growing, you must apply good spring fertilizer, promote slightly, promote flower, increase fruit set rate. Open ring shallow ditch (about 20 to 30 cm deep), depending on the size of the tree, each plant nitrogen fertilizer (mainly urea) 0.2 to 1.0 kg, and with the addition of phosphorus and potassium fertilizer, after the application of soil. Its main role is to promote shoot growth and flowering. In the winter, more base fertilizers or even Yang fertilizers may be applied during this period.

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