1, timely topdressing before flowering The jujube flowering period is the period of vegetative growth and reproductive growth, and it is also the time when the amount of fertilizer is the largest. This period of lack of fertilizer will have a greater impact on the fruit setting rate, especially in the winter and spring and the lack of base fertilizer, bud before the fertilizer has not applied in the winter date garden should be applied in early flowering flowering fertilizer. Pay attention to fertilizer: nitrogen, phosphorus and potassium are generally used in the ratio of 1:1:1; based on fertility, tree vigor, and previous year's results, the amount of fertilizing can be reasonably arranged. The result of 5-10 years of tree fertilization is generally 0.25- 0.5 kg; when applied to the roots, it can be combined with the control of pests and leaves to spray fertilizer. 2, pay attention to the prevention and control of pests and diseases Winter jujube flowering period is a concentrated period of invasion of various pests and various bacteria. Many diseases that occur later in the fruit (such as rotenia, brown spot, perforation, and various pathogens that cause rotten fruit, etc.) mainly occur at the flowering stage. Therefore, the prevention and control of pests and diseases during the flowering period should be emphasized. The main insect pests during the flowering period are L. lucidum, spider mites, leaf aphids, and aphids. The control of green plague can be used for 15000 times of Aimeole, 1000-1500 times of dead card for bell and 1000 times of hurricane. The control of red spider, leaf aphid and other pests can be used for 1000 times of azoline and 800 times of worm. Times; open after the prevention of a beetle can kill more than 800 times insects, A nettle 5000-6000 times the net spray at a mouth, every 5-7 days once, even spray 3-4 times. The main drugs for preventing and controlling diseases during flowering are: 800 times that of bacterial diseases and 3,000 times that of streptomycin for agriculture; and 1500 times for fungal diseases, 800 times for Xinling, MnZn, or Dasheng M. -45600-800 times liquid spray. Do not arbitrarily increase the multiple of medication when using flowers during flowering, otherwise it may cause falling and fruit drop. When spraying, choose no-wind weather, 7-10 am or 4 pm. After the spraying, it will rain within 10 hours. After the rain, it should be sprayed in time. 3, timely opening Open armor is an effective measure to improve the fruit setting rate of jujube trees. This technical measure is particularly important after the winter jujube trees are converted from garden cultivation to field cultivation. Poor mastering of open armor technology can easily result in dead sticks, dead trees, and heavy fruit drop. When opening an armor, pay attention to the following principles: (1) Armored time. In the mid-to-late mid-June flowering season, when each date is over 10 blossoms, it is suitable for opening. Specific time should be flexible. In the event of rainy or cold weather, the opening time should be delayed as much as possible. When the temperature rises to above 24°C, it must be opened again. (2) Open a site. For trees over 5-10 years old, the main branch (larger than 3cm in diameter) is dominant, and the small tree in 3-4 years is mainly open trunk. When opening the armor, the dry rot should be avoided. The new date jujube heads were placed on the trunk for a short update. No matter whether it is a big tree or a small tree, it is necessary to maintain auxiliary branches. This is an effective measure to prevent dead trees after opening. The amount of auxiliary branches should account for 1/10 to 1/5 of the total branches of the tree. (3) Armor width. It is necessary to grasp the principle of "a strong tree is broad enough and a weak tree is appropriately narrow," and "the strong tree should be opened early and the weak tree should be opened late or not." The general requirement is that the width of the open armor should be 1/8 to 1/5 of the diameter of the open armor, and the width should not exceed 1 cm. (4) A mouth healing time is generally 35-40 days. If the tree vigor is significantly weakened after opening, the leaves are yellow and accompanied by spot disease, measures should be taken to promote the healing of the mouth as soon as possible. A high concentration of gibberellin can be applied at the mouth of a mouth and the mouth can be bandaged with a wide plastic tape or film. For trees with strong tree potential and fast healing, the callus should be removed in time. (5) Protection of a mouth. After opening 3-5 days, it is necessary to inspect the healing of A mouth from time to time to prevent and treat the nailworm. 4, do a good job picking up the work The temperature during the flowering period of Dongzao jujube is relatively high. After the armor is opened, the nutrients on the aerial part of the jujube are cut off. The jujube head, the secondary branch, the lignified jujube hanging, the base sprouting, etc. grow vigorously, which not only consumes the nutrients of the tree, but also is not conducive to the control of diseases and insect pests. Therefore, we must timely remove the newborn dates, cut off the base sprouting, and the second branch, lignified jujube hanging for the heart. After a short update of the spring, put the jujube head up to 5-7 second branches and then pick it up in time to control the growth. 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