Erase double buds, triple buds, deformed buds and all buds 40 cm from the ground, leaving the strong ones weak; When pruning, only one bud is left in the bearing mother branch with two buds. The principle of selection and retention is to be as close to the trunk as possible to prevent the resulting parts from moving outward; When two or three buds are produced at the same node, only one bud is selected. The principle is to leave strong buds without weak buds, flowers without gaps, and choose the right position.

2. Pick up the core from the vice tip and pick up the core.

Cut 3 ~ 5 cm from the tender tip of the new shoot. Picking is carried out before flowering until the new buds stop growing. Picking the core of new shoots before flowering can inhibit the prolonged growth of new shoots, make the nutrients made by leaves turn to inflorescences, make fertilization good and improve the fruit setting rate; Picking new shoots in the later stage can improve the light conditions on the shelf surface, promote flower bud differentiation, increase yield, enrich branches and vines, and lay a good foundation for increasing production next year.

Step 3 pick leaves

In the late stage of ear ripening, properly removing some old leaves that have lost their functions can improve the lighting conditions around the ear, which is beneficial to the coloring of the ear and improve the commodity value; However, the time to pick leaves should not be too early or too much. Picking too many leaves too early will weaken assimilation due to the reduction of leaf area, which is not conducive to the accumulation of nutrients in the tree, and it is also easy to make the ear suffer from sunburn.

Extended data:

Matters needing attention in winter maintenance of grapes:

There are two factors that affect the safe overwintering of grapes, one is low temperature, and the other is dry wind.

Dormant grape plants have certain resistance to low temperature, but the cold resistance of different parts of the plants is very different, and the buds have the strongest cold resistance and can tolerate low temperature of about MINUS 20 degrees. Roots have the weakest cold resistance. When the soil temperature is below MINUS 5 degrees, it will cause freezing injury, and the cold resistance of branches and vines is between buds and roots.

Generally speaking, when the outside temperature is lower than-15 degrees, grape plants are prone to freezing injury. In order to enhance the cold resistance of grape plants, irrigation times should be reduced at the late stage of grape harvest to prevent the plants from growing vigorously, improve the maturity of branches and buds, make them gradually adapt to lower and lower temperatures and enhance the cold resistance.

The cold protection time should be arranged about one week before the local soil freezes, neither too early nor too late. This can fully exercise the cold resistance of plants and improve their ability to resist low temperature. At the same time, it can prevent excessive soil temperature and humidity, which leads to the breeding of germs and infection of branches. The main measures to prevent cold in winter are root soil cultivation, soil mulching and plastic film mulching.

Reference: Baidu Encyclopedia-Grapes