First, under the tree management
1. Fertilization. Spring fertilization includes the application of base fertilizer in early spring and quick-applied fertilizer in late spring. In the late spring, the quick-to-apply fertilizer is dominated by nitrogen fertilizer, and it is carried out before and after germination from April to May. General adult trees are on the side of the outer side of the tree, digging 4 to 8 small pits 30 to 40 cm deep, each topdressing 0.5 to 1 kg of urea, 2 kg of superphosphate, and young trees reduced.
2. Spring irrigation. Most of the northern spring is arid and less rainy, and jujube trees are poured with germinating water before sprouting to supplement the required water for jujube sprouts. The amount of irrigation should be based on the weather, public opinion, tree potential, age, etc. Spring irrigation is best combined with dressing.
Second, pest and disease prevention
1. Scratch the old skin, clean the fruit drop, sick fruit, remove the diseased jujube strains, and burn them together.
2. Before the budding of the jujube tree, spray 3 to 5 Baume degrees lime sulfur or 80 to 100 times liquid solibar to kill part of the overwintering pests and diseases.
3. Repair a mouth. For those who have not yet completely healed because of excessive armor or nail beetle damage, they must use spring time for repair. One is to remove the hidden nail beetle in the mouth of A. The second is to clean up the dead and injured tissue at the mouth of A. The third is to wrap the mouth of A with a plastic film.
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