The best way to improve the fruit set rate of jujube
To improve the nutrient level of the tree, the quick-acting nitrogen fertilizer should be applied in the germination stage and the young fruit stage to ensure the nutritional needs of the flower and fruit.
For Zhuangshu in the full bloom period, the jujube and the armor can effectively inhibit the downward transportation of organic nutrients and improve the nutrient supply of the foliage flowers.
The tender period of open armor is the full bloom period. The first time the jujube tree is opened at 10-20 cm on the ground, peeled deep with the knife ring to the xylem, the width is 0.3-0.5 cm, and the strong tree should be wide and weak. Narrow, peeled and coated with insecticide to protect the mouth.
In the flowering period, the jujube slashes the backbone with a narrow axe, pleading for the depth and depth, reaching the xylem. As a result, the saplings are cut once a year, and the trees are cut 3-6 times a year. Each time they cut three times, the axe marks are plum-shaped. , 2-3 cm per lap.
Spraying growth hormone and trace elements naphthaleneacetic acid, gibberellic acid and indolebutyric acid can enhance jujube fruit set, among which the best effect is to spray 10-50ppm gibberellin during the flowering period. Trace elements such as boron, manganese and zinc all play an important role in jujube flowering and fruit setting. Spraying 3000 times borax solution during flowering can obviously increase the fruit setting rate.
Spraying water during flowering, increasing air humidity When the relative humidity of air is lower than 60%-70%, the germination rate of pollen will obviously decrease. During the flowering period, there are many winds and droughts in the north, so spraying water during the flowering period can effectively increase the fruit setting rate. The water spray time is best at dusk, followed by the morning, with the worst effect in the middle and afternoon.
The bee-assisted pollination date is a good honey-sourced plant, and the bee can support pollen transmission during flowering.
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