after flower bud differentiation, the mixed fertilizer of nitrogen, phosphorus and potassium is mainly used, which is beneficial to fruit development and root growth, and can improve fruit quality. In order to improve the fruit setting rate, sodium borate and zinc sulfate can be sprayed 3 times at flowering stage, which can effectively improve the fruit setting rate. Moreover, jujube trees have many flowers, low fruit setting rate and serious flower and fruit dropping, which is also a key period for pest control. Therefore, strengthening the management of jujube orchards in May and June has a great impact on the annual output. The work in this period mainly includes soil, fertilizer and water management, improving fruit setting rate, pruning in summer and pest control.

organic fertilizer: it can increase the nutrients of plants, store more nutrients for fruits, and convert starch into soluble sugar, which makes the taste better and improves the quality. Therefore, the application of organic fertilizer is one of the important reasons why the harvested dates are sweet or not. Topdressing at the young fruit stage not only directly affects the yield, but also affects the quality of the fruit. The special water-soluble fertilizer for Fujinmen fruit expansion is the main one. Foliar fertilization. Also called topdressing outside the roots. Trace elements can promote the fruit-bearing rate and yield of jujube trees, especially boron. Spraying boron can not only promote the early flowering of jujube trees, but also promote pollination and fruiting; But also can overcome the adverse effects of rainy weather on flowers, and achieve the purposes of protecting flowers and fruits and improving the fruit setting rate.

Applying 1kg urea or 1kg compound fertilizer at the last flowering stage can significantly increase the yield. The application method is: dig a deep annular ditch with a width of 4 cm at a distance of 2 meters from the trunk, sprinkle the fertilizer in, fill it with water, and fill the ditch after the water permeates. The amount of fertilization depends on the comprehensive situation of jujube tree size, fertilizer types, soil fertility and fruit yield. For the big trees in the full fruit period, more fertilization should be applied, and more fertilization should be applied appropriately in the case of more fruits, lower soil fertility and poor fertilizer quality. On the contrary, fertilization can be appropriately reduced.

No matter which fertilizer is topdressing, the distance of topdressing should be determined according to the length of root system, otherwise it will easily cause fertilizer damage. No matter what kind of fertilizer, it should be backfilled and watered in time after chasing. This is beneficial to the absorption of fertilizer.