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Winter jujube long high yield early high yield technology
Jujube is one of the famous varieties in China. Due to its thin and crisp skin, high sugar content and unique flavor, it has a good market prospect and high economic benefits. It has aroused great interest among the fruit farmers. Many old jujube gardens want to change the jujube, In order to increase economic efficiency, this project was conducted in Jiacun, Xing'an Township, in 2001, and the high-risk access to 50-mu 15-20-year-old Ziziphus jujuba and bollworm dates was achieved. The graft survival rate was 96%, and the growth of the new date was 100. -130 cm, achieved a year of grafting, two-year results, three-year yield effect. Now we will introduce the high-sweeping heads technical points as follows. First, scion selection. The scion shall use the outer circumference of the crown, grow and mature one-year-old jujube head or secondary branch, with a suitable thickness of 0.4-0.8 cm. The length of the scion shall be 2-3 buds. The wax shall be sealed and the scion shall be placed after wax sealing. The temperature is 0-5°C and the humidity is stored in a cold storage of about 90%. Second, big tree processing and grafting methods. Because the old trees are crowned and sparsely planted and the trunk is too high, and the winter date must be picked manually, the height of the tree should be controlled at 2-2.5 meters. The head should be wiped at 80-100 cm from the surface of the jujube tree half a month before germination. Flatten the perimeter. Use the skin grafting method. Insert 4-6 scions in different orientations, bundling with plastic strips, and then using plastic sheeting to wrap around the interface. Third, after the management of grafting 1, timely removal of sprouting, generally clear 2-3 times. 2, to strengthen the management of fertilizer and water, topdressing urea or N, P, K compound fertilizer in early June. A 0.4% urea solution is sprayed on the foliage, usually 2-3 times. In the autumn, basal manure was mainly organic fertilizer, and the gutters were applied in 30-50 kg/plant. 3. Insect pest control, in the budding stage, coincides with the prosperous period of the buds of food buds and caterpillars, and should be sprayed once or twice with water phosphorothiol or extermination, and June-August is the red spider of the jujube tree. During the period of damage, it is generally necessary to spray 1-2 organophosphorus pesticides to effectively control red spiders and other leaf-eating pests. IV. Management after grafting. In addition to pest control and fertilizer and water management is basically the same as the first year, it should also do a good job to open branches and open armor. 1, pull branches open angle. In May, the north and the south branches were pulled in the opposite direction, and the other positions of the branches were reinforced with ropes at a distance of about 5 cm to prevent chapped cracks. Then they were tied in the middle of the jujube head to pull apart the 70 angles. 2. The robustly growing jujube head can be opened at 5 cm above the interface at the beginning of full bloom, and the width should be 0.2-0.3 cm. Other weak branches can be used for multiple loops to promote early results. 3. After two years of grafting, the tree can be opened on the trunk with a width of 0.5-0.8 cm. 4. Spray 10-15 mg/L of gibberellin 5 days after the armoring, and then spray it once a week, spraying 2-3 times.