(1) The characteristics of Lizao and Dongzao branch buds. Jujube tree has three kinds of main buds, deputy buds and adventitious buds. The main bud is located at the top of the development branch (Zaotou) and the lateral leaf bud, and the main bud at the top of the development branch at the top of the resulting mother branch (jujube) has more vitality. The accessory bud is located on the side of the main bud. The secondary buds born in the upper part of the development branch germinate into the resulting base branch (secondary branch), which is born in the lower part of the development branch or the resulting base branch, and the resulting secondary bud on the mother branch germinates and produces the branch (date). Adventitious buds: that is, the location and time of germination is uncertain, generally in the mechanical wounds of trunk and main branches, developed from ray parenchyma cells. It can germinate into new dates. Adventitious buds play an important role in renewal pruning. The role of the main jujube bud is to germinate the jujube head and form the skeleton of the tree or the result stick group. Pruning is to stimulate the germination of the main buds, to cultivate the stems and the resulting sticks. (2) Sapling shaping. Lizao jujube and Dongzao jujube tree are strong and happy light tree species. The pruning of young trees should adopt different tree shapes according to different densities. About 155 plants per 667m2 were planted with sparse trunks. The density of jujube trees is about 40 cm. According to the structure of each tree, the top shoots are cut off, the second branches are cut off, or the second branches are cut off by 1–2 knots. Where it is necessary to cultivate the backbone sticks and the result stick groups. , Stimulate the primary buds of the secondary branch base or secondary branch nodes (date stocks) to germinate the date heads and cultivate the stems of the bone formation or result branch groups. The primary buds of young trees have strong germination power, and they can choose to retain the stem branches or result branches at the appropriate sites. (3) Pruning of the resulting tree. The results of the jujube tree pruning task are: to maintain a good tree structure, uniform distribution of branch weight, good lighting of the crown, and constantly cultivating the results of branches and branches, maintain a strong growth potential and a longer number of years of results. In order to achieve this goal, we must promptly eliminate stubborn branches, competing branches, cross branches, over dense branches, thin and weak branches and diseased branches, retracting drooping branches, and the first and second years of raw dates on the branches, according to the size of the space. , leaving 3-5 secondary branch short culture results Zhizu. When the backbone branches prolapse and weaken, it is retracted to maintain it at 60-70 degrees. (4) summer trim. Jujube vigorous growth, pruning should be combined with winter shear and summer shear, should be based on winter shear, in order to facilitate the early formation, high-quality and high yield. The main methods of summer pruning are: 1), jujube head topping. In May-August, when the jujube heads were not lignified, 3 to 5 secondary branches were retained and the tip shoots were removed to prevent growth. Flowering jujube head topping can increase fruit setting rate and promote young fruit growth. Branch extension canopy in proper length (50-60CM) can pick up the heart, can promote branching and thick growth, increase the sharpness of the backbone, and increase the load. 2), wipe the bud. During the growing season, the useless shoots on the stems and trunks are wiped out in time to save nutrition, prevent disturbing the tree, and affect the ventilation. 3) Thinning. For the dense jujube head and no use of the jujube head in a timely manner to eliminate. 4) Pull the branches. For branches with inappropriate growth and angles, the green branches are soft during the growing season and pull branches are adjusted. 5), in addition to Meng. Root shoots sprouted on the ground around the trunk and cleared as soon as they were not propagated. 4. Reasonable fruiting, fruiting and high-yielding Jujube trees have a long flowering period, a large amount of flowers, and a low natural fruit setting rate. Artificial promotion of reasonable fruit set is of great significance for increasing yield and improving fruit quality. To promote the "head and head" to sit on the "powder fruit" and achieve fruitful results for each branch, and it will be able to produce high yields and make it a good quality fruit. (1) ring cutting, ringing (opening). In early June, circumcision and girdling were carried out around the time when the whole tree jujube flowered around 30%. Jujube trunks are circumcised below 20CM for the first time. They are cut once every 7 days before and after the first time. They are cut 3 times. The ring cutting can be performed on the trunk or main branch. Dry circumcision was performed on trees above 20 CM, with a width of 0.5-0.7 mm (circumcision, circumcision refers to a tree with less flowering and less fruit). (2) Zaotou topping. Flowering date jujube head tossing, inhibiting jujube head prosperous, so that more nutrients flow to the flower department, can increase the fruit setting rate. (3) Improve the microclimate in the field. When the weather is dry during the flowering period, the soil moisture content is low. When the tree tray is watered and the water-free condition is used, water can be sprayed on the canopy, and the water spray should be performed after 17 o'clock. Spraying for 3-4 days will increase the air humidity and improve the microclimate in the field. Promote fruit setting. (4) Put the bee on the jujube garden. Put the bees in the jujube garden or around the jujube garden to spread pollen for the jujube flower, so that the jujube flower can be fully pollinated and promote fruit setting. (5) Lazhi happy. For branches that grow more upright, branching is done and the branch angle is above 70 degrees. Slow growth potential and promote fruit setting. (6) Spray gibberellin and trace elements. A gibberellin was sprayed once at the initial flowering stage, and 0.3% borax, 0.3% zinc sulfate and ferrous sulfate were sprayed 1-2 times from the flowering stage to the young fruit stage to promote fruit setting. (7) Thinning the fruit. After physiological fruiting, fruit trees with denser fruit set were used for fruit thinning, reaching 1 fruit per Wangzao hanged, and 2-3 hanged with weak trees. ![]()
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