First, management before picking
1. Prevent falling dates. Jujube trees enter the mature stage to the pre-harvest stage. In case of heavy winds and heavy rains, they often cause dead dates. Therefore, for jujube trees with more results, the poles must be fixed and the tree body must be strengthened by pulling branches and supporting branches. , reduce the date caused by strong winds.
2. Adjust the crown. If there is a lack of space or space in the jujube tree, it can be pulled out to fill the space to adjust the crown and expand the result area.
3. Plan to protect your money. Before the harvest, the land with poor soil moisture in the jujube garden still needs to be watered once.
4. Prevent disease. Pre-harvest, the jujube tree prone to diseases such as ringworm disease, soft rot, black spot, shrinking fruit disease. For the diseased jujube garden, the diseased fruit on the tree should be removed as soon as possible to pick up the dead Fruits, remove the diseased leaves and fallen leaves on the ground, reduce the chance of pathogens infecting each other, and spray 70% BPA 800 times liquid. Or chloramphenicol 1200 times control. Fruit coloring to mature picking period, the jujube tree branches to rake the grass to trap the last date larvae of Myzuspermum, Juicy fruit coloring to the mature picking period before emergence of adult worms to relieve the grass, concentrated burned, reduce the source of insects.
5. Harvest timely. In order to ensure the flavor and value of jujube, we must do timely harvesting. When picking jujube fruit, lightly pick lightly, reduce the wound, so as not to invade the mold. For jujube preparations that are ready for storage and preservation, they can be picked in advance when the redness is about 1/3 of the whole jujube in the later period of ripening.
Second, the management after picking
1. Foliar spraying fertilizer. After jujube trees are picked, they are immediately sprayed with 0.3% to 0.5% urea and 0.4% to 0.5% potassium dihydrogen phosphate mixture to supplement nutrient deficiencies after fruit picking, to avoid premature defoliation, and to improve post-photosynthesis. Efficiency, increase tree nutrient accumulation, promote flower bud differentiation.
2. Reapply base fertilizer. Base fertilizers can be applied after harvesting until the leaves are fallen, but they are generally suitable for mid-October. Generally from the growth stage to the full fruit stage, 50-80 kg of organic fertilizer is applied to the big trees, and 0.3-0.5 kg of urea and 1.0-1.5 kg of superphosphate are mixed at the same time. The basal fertilizer should be combined with the soil of the jujube orchard and ploughed. .
3. Plowing to improve soil. Cultivating the garden before the soil is frozen can not only improve the soil structure and promote the growth of the roots, but also can turn fallen leaves, residual fruits, and weeds into the ground, and can also be used to overwinter winter peaches. The pests, such as jujube rifles, turned to the surface and were eaten by birds or frozen to death. Jujube forests with intercropping of dates and grains were intercropped and the soil under the canopy and under the canopy was deep-rooted; The depth of the garden should be 15 to 25 centimeters. The closer to the trunk, the shallower the plowing should be. The farther away from the trunk, the deeper the plowing.
4. Control pests. After defoliating, spraying 3 to 5 Baume degrees lime sulfur plus 200 times sodium pentachlorophenol can eradicate some wintering germs and pests.
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