How do Northeast Grape survive the Winter

The climate in Northeast China is cold in winter. The minimum temperature for grape growth is about 12 ℃-15 ℃, and the lowest ground temperature is about 10 ℃-13 ℃. So, how do northeast grapes survive the winter?

1. Anti-cold method of burying soil on the ground

It is suitable for plants with small plants and few branches, and the nearby soil can be taken and buried when the root system is not affected. First of all, the branches after pruning and pruning are placed on the ground in its natural direction, and the branches of the scaffolding can be tied up with straw rope, etc., and then cushioned with a soil pillow at the base of the branches, which can prevent the branches from breaking and increase the cold protection effect of the root system at the same time. Finally, the soil was taken 1.5 meters away from the root system, and the whole plant could be strict. The thickness of buried soil depends on the local climate and soil conditions, the varieties cultivated and the cold resistance of rootstocks. Generally, the thickness of buried soil in North China and other places should not be less than 30 cm, and it can be thickened appropriately in cold areas.

Second, the method of protecting against cold by burying underground soil

It is suitable for plants with more branches or older trees. First of all, the pruned branches and vines are tied up in their natural direction, and then they can be divided into several groups according to the amount of branches, and then dig ditches on the ground along its direction. the ditch is deep and wide according to the size of the bundles of branches, so that the branches and vines can be completely put into the ditch or half into the trench, with a general depth of 30cm 50cm and a width of 50cm. It is necessary to dig shallowly near the root to prevent injury to the root. If there are conditions, you can also put the branches and vines into the ditch, cross the wooden pole on the ditch, and then cover it with a layer of 10 cm thick crop straw, leaves and hay, and finally cover the soil for 3 times, each time the soil should not be too thick, and gradually thicken and bury the soil as the temperature drops, the heat preservation effect is better.

III. Protection against cold by plastic film

It is suitable for grapes which are inconvenient to dig trenches in the courtyard to protect against cold. The pruned plants are bundled and pressed on the ground in their natural direction, and then covered 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 in plastic agricultural film and cultivated strictly around. Be careful not to break the plastic film during the cold prevention period, otherwise the cold air will easily cause freezing damage.

Fourth, the method of protecting against cold by locally buried soil.

It is suitable for the areas where the minimum temperature in winter is not lower than-10 ℃, the air humidity is high, and the varieties with strong cold and drought resistance. Under the condition that the grapes are not pruned or removed from the shelves in winter, a 30-meter-thick mound of 50 cm thick is grown at the base of the plant before the soil is frozen, and it will be pruned again in the following spring.

In addition, it should be noted that when burying the soil, the soil should be flat, the block should be thin, the buried soil should be strict, and the thickness of the covered soil should be uniform. Check frequently in winter and find that there are cracks to be filled with soil.