Suitable for plants with small plants and few branches and vines. Under the condition of not affecting the root system, borrow soil nearby for cultivation and burial. First, put the pruned branches on the ground in the natural direction. You can tie the branches in the shed into bundles with straw ropes, and then place soil pillows at the roots of the branches, which can prevent the branches from being crushed and increase the cold-proof effect of the roots. Finally, soil is taken from the root system at a distance of 1- 1.5 meters, and the whole plant is strictly cultivated. The thickness of buried soil depends on local climate and soil conditions, cultivated varieties and cold resistance of rootstocks. The thickness of buried soil in North China and other places is generally not less than 30 cm, and it can be appropriately thickened in cold areas.

2. Underground cooling method:

Suitable for plants with many branches or older trees. First, tie the pruned branches and vines in the natural direction, or divide them into several groups according to the number of branches, and then dig trenches in the natural direction on the ground. The depth and width of the ditch depend on the size of branches and branches, so that branches and vines can be completely or partially placed in the ditch. Generally, the depth is 30-50 cm and the width is 50 cm. Dig shallowly near the root to prevent the root from being damaged. After the branches and vines are put into the ditch, they should be cultivated strictly with soil and covered with soil for 20-40 years. If possible, you can also put branches and vines in the ditch, cross the wooden poles on the ditch, and then cover with a layer of 10 cm thick crop straw, leaves and hay. Finally cover the soil for 2-3 times. Don't cover the soil too thick every time. As the temperature drops, it will gradually thicken and bury, and the heat preservation effect will be better.

3. Local buried cooling method:

It is suitable for areas where the lowest temperature in winter is not lower than-10℃ and the air humidity is high, and varieties with strong cold resistance and drought resistance. When the grapes are not pruned or taken off the shelf in winter, a mound with a thickness of 30-50 cm should be cultivated at the base of the plant before the soil is frozen, and then pruned in the following spring.

4. Plastic film protection cooling method:

Suitable for grapes that are inconvenient to dig ditches in the courtyard to prevent cold. After binding the trimmed plants, press them on the ground in the natural direction, and then cover them with a layer of sawdust, wheat straw, corn straw or rice straw with a thickness of 40 cm. In order to prevent air drying and ventilation, the outer layer is wrapped with plastic agricultural film and the surrounding area is cultivated with soil. Be careful not to break the plastic film during cold protection, otherwise cold air will easily cause frostbite.

Matters needing attention

1. Before burying the soil for cold protection, you should pour 1 time of frozen water, which can increase soil moisture and improve the ability of cold resistance and drought resistance, which is conducive to the safe overwintering of plants, and can also bring soil for cold protection. However, attention should be paid to burying the soil after the topsoil is dry to prevent the bud eyes from becoming moldy due to excessive soil moisture.

2. If trench is used for cold protection, it should be dug in advance, fully dried and then buried for cold protection.

3. When taking soil, it should not be too close to the root, but should be-1.5 meters away from the root neck to prevent ventilation from damaging the root.

4. When burying soil, the soil should be flat, the blocks should be fine, the burying soil should be strict, and the covering soil thickness should be uniform. Always check in winter, fill in the places where cracks and rat holes are found, and add soil where there is not enough soil.