Spring is the season for grapes to germinate and spread leaves, branches to elongate, heading, flowering and fruiting. Strengthening the management of spring grapes can improve grape yield and quality.
From mid-late February to early March, germination water was irrigated and quick-acting nitrogen fertilizer was applied. Conditional orchards at this stage should be irrigated in time to ensure that the buds are tidy. At this time, when the flower buds continued to differentiate and the new shoots began to grow vigorously, a lot of nutrients were needed. Therefore, the manure and urine mixed with cooked manure were mixed with 0.2% urea.
From March to mid-late April, the shoots, buds, flower spikes, and disease prevention and control. After winter refurbishment, the winter buds on the mother branch usually germinate, and you should pay attention to leaving buds at this time. If you leave too many buds, it is easy to waste nutrients, and the tree is weak, which is not conducive to fruit setting. However, if you leave too few buds, it is easy to promote the vigorous growth of branches, and it is easy to drop flowers and fruits.
Wiping buds: Generally, when there are multiple buds germinating on one fruiting branch, one bud is left every 15-20 cm, and two or five new shoots are left on each fruiting branch. The rest is wiped from the base. When wiping the buds, the non-fractal buds or weak buds in the double buds are generally wiped out, leaving only one tip of each bud eye. In order to ensure the yield, when the new shoot grows to 4-5 leaves, it can be decided to leave it depending on whether the first coil of silk has flower spikes, but this wastes more nutrients.
Fixed shoot vines: The new shoots that are reserved have 5 leaves topping above the spikes before flowering, and 8 leaves topping without flowers. After topping, a large number of auxiliary shoots were germinated, leaving only 1 or 2 auxiliary shoots at the top and 2 leaves repeatedly topping, and the remaining auxiliary shoots were all wiped off. At the same time, we must tie the vines in time according to the growth of the vines.
Treatment of flower and fruit spikes: In order to ensure fruit setting, artificial tips are usually used to remove 1/5 of the spike tips, and 0.3% boron fertilizer and 0.5% urea are sprayed during flowering. After 5 days of flowering, fruit trees with more fruits were artificially thinned and then bagged for protection.
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