The year's plan is in spring. At present, epidemic prevention and control is in a critical period. Grape management in spring is approaching step by step. Seeing the threat of epidemic spread, recently, Fan Yafeng, an agronomist at Heyang County Agricultural Radio and Television School in Shaanxi Province said that cultivated red grapes In early spring, management must be carried out.
First, fasten the scaffold before replacing the broken cement rod, cross arm, and tighten the steel wire before planing the soil (note that it is best to use galvanized anti-rust iron wire or steel wire, angle iron on the scaffold selection). It is necessary to reposition the cross-arms. Three high-wire five-wire V-frames, one is 90-95 cm from the ground, the other is about 120-125 cm from the ground, and the three is about 160-165 cm. Leaf growth and ventilation create conditions. In particular, do a good job in fastening ground anchors to prevent wind damage.
Second, the best time to unearth the red grapes from the shaved soil is 10 to 15 ° C. When the grape roots begin to move, that is, from March 20 to early April each year, you can refer to the local apricot tree blooming. Before unearthing, it is best to plan the soil to check the germination of grape bud eyes. The best results are when the bud eyes are enlarged at about 50%. If the excavation is too early, the grapes are susceptible to late frost and wind and drought in the spring, causing moisture loss, delayed germination and irregular germination. If the excavation is too late, the first is that it is easy to damage the germinated buds during the excavation and shelves Most of them have inflorescence buds), which not only affect the yield, but also cause tree trauma, disease infection, and affect tree vigor. The second is that the germinated buds are likely to cause burns after they are directly exposed to the sun.
3. The main side vines should be determined according to the tree shape after the excavation and kidnapping. The direction and position of the tying should be determined. The main vines should be fixed on the surface of the rack with horizontal ties. Points to note in work:
1. After unearthing, untie the branches that are bound together, and leave them in place for 2-5 days depending on the buds, and then bind them to the shelves. Lying on the ground horizontally can increase the germination rate of winter buds in the middle and rear parts and enlarge the fruiting area. At the same time, the main tissue root strain caused by the abduction immediately is avoided.
2. Grab abduction should pay attention to the reference frame type. Because of the favorable situation, the main pole should be at an angle of about 60 degrees with the ground. Pay attention to two points when abducting. The second is to keep the top of the parallel main branch part parallel to the steel wire, to avoid the phenomenon that the top of the tree is raised, the top is too strong, the top is slightly overgrown, the middle and lower branches are slightly delayed, and the flowering results are uneven. .
3. For single-arm V-frame shaping, pay attention to the distance between the two main poles (arms) between 20-30cm (also known as several corners) when abducting, leaving enough space for the growth of the middle and lower branches.
4. During the abduction, the steel wire should be fastened to avoid swinging left and right, which will cause the branches to wear and disease infection, but the branches cannot be tied too tightly, so as not to affect the later development. It is recommended to use a commercial nylon stick card, which is easy to use and reusable.
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