To increase the nutrient level of the tree, top-dressing nitrogen fertilizers should be applied in the bud and young fruit period to ensure the nutrient requirements of the flowers and fruits.
For Zanthoxylum tree at the full flowering stage, it can effectively inhibit the downward transport of organic nutrients and increase the supply of nutrients to the branches and leaves.
The opening period of the open armor is full bloom, and the first opening of the jujube tree begins at 10-20 cm above the ground and is peeled off with a knife ring up to the xylem. The width is 0.3-0.5 cm. The strong tree should be wide and weak. Narrow, peeled and coated with insecticide to protect the mouth.
In the flowering period, the jujube is chopped with a narrow and sharp axe, and is asked for the same depth and depth, reaching deep into the xylem. As a result, the young tree is cut once a year. The fruit tree is chopped 3 to 6 times a year, three times each time, and the axe is plum-shaped. 2-3 centimeters per circle.
Spraying growth hormone and trace elements naphthalene acetic acid, gibberellin, butyric acid can promote the jujube tree fruit setting, and the best effect is to spray 10-50 ppm gibberellin at flowering stage. Trace elements such as boron, manganese and zinc all play an important role in jujube flowering and fruit setting. Spraying 3000 times borax solution at flowering stage can obviously increase fruit setting rate.
Sprinkling water during flowering, increasing air humidity When the relative humidity of air is lower than 60%-70%, the pollen germination rate will obviously decrease. During the flowering period, the winds in the north are more dry and droughty. Therefore, spraying water during the flowering period can effectively increase the fruit setting rate. The best water spray time is in the evening, followed by the morning and the worst in the middle and afternoon.
The bee-assisted pollination of jujube is a good honey plant, and flowering at the flowering stage can help spread the pollen.