How do giant bee grapes survive the winter and why do they freeze

How to survive the winter of grapes, do the following measures to avoid freezing:

1. Plastic pruning.

1. Pruning time: In areas that are not cold-proof in winter, pruning can be completed from 2 weeks after the leaves fall to before February of the following year; Areas that are more prone to frost damage are best pruned after severe cold; In winter, it is necessary to bury soil to protect the area from the cold, and it can be pruned after the leaves fall to protect against the cold.

2. Pruning method: It should be determined according to the growth of grape trees in the area, and adhere to the principle of leaving more thick branches, less medium to weak branches, too dense and thin and thin. The length of the pruning is determined by the number of buds left by the mother vine, the general length of the pruning is divided into 3 kinds, 2-3 buds are pruned at short tips, 4-7 buds are pruned at the middle tip, and 7-11 buds are left by long tip pruning, here, there is also very short tip pruning, leaving only 1-2 buds at the base, and pruning with extremely long tips, leaving more than 12 buds.

2. Real-time garden cleaning: In connection with winter pruning, the dead branches and leaves in the garden and the scattered diseased fruits, diseased ears, diseased leaves, diseased branches, tendrils, etc. discarded in the garden after fruit picking are unified and buried or destroyed outside the garden, so as to reduce the wintering base of diseases and insects, so as to reduce the risk of diseases and insects in the coming year.

3. Spraying protection: After all the leaves of the grapevine have fallen leaves, carry out a garden cleaning and sterilization in time, spray 1-2 times, and choose 40% DuPont Fuxing 6000 times + 90% DuPont Wanling 2500 times + 1500 times synergist, or 21% peracetic acid 100-150 times + 90% DuPont Wanling 2500 times + synergist 1500 times, or 5-6 Bordeaux liquid stone sulfur mixture + 90% DuPont Wanling 2500 times + synergist 1500 times a plus net. When spraying, it is required to be detailed and thorough, and the tree and ground are sprayed evenly.

It is best to choose a sunny or cloudy day in the morning at the time of spraying, and the medicine has a good effect on the prevention and control of black pox, felt disease, white rot, scale osteiasis, etc.

4. Deep ploughing of garden soil: Most vineyards are overgrown with weeds, the soil permeability is poor, and the soil is compacted after a long time of park operation. It is required to carry out a deep tillage, which can loosen the soil and protect moisture, increase the aeration permeability of the soil, and promote the growth of the root system.

The depth is generally 25-30 cm is good, the plant should be shallow, the row should be deep, and it can also be combined with basal fertilizer. It can be drained and irrigated, deep ploughing of the high compartment, and flat compartment surface, so as to create a good growth environment for high-quality and abundant grapes.

1. Before the arrival of low temperature, growers should purchase cold-proof sponges from manufacturers in time to wrap the trunk, generally 2 meters long and 1 meter wide, with a thickness between, according to the circumference of the trunk, cut into sponge pieces larger than the perimeter, and use hemp rope to wrap from the lower part of the trunk to the top. This can play a role in waterproofing, windproofing and reducing the temperature difference between day and night. After bandaging, the base of the trunk is deeply buried in the soil, and the temperature of the trunk can be increased by 3-5 degrees after bandaging, which greatly reduces and avoids the occurrence of frost damage, and the insulation sponge can be removed after the beginning of spring and reused in the next year.

2. Bury with sand or bury the soil to prevent the cold First tie the grape branches and vines cut in winter along the ditch, cover 20 cm or 30 cm with sand or soil, and then when the soil freezes 10 cm, cover 50 cm with leaves and firewood, and extend 1 meter around. At the same time, several straws (sorghum stalks) are buried, and the upper end is exposed, which plays the role of ventilation and light transmission.

3. Hollow cold protection in the ditch with bricks and adobe to build a trough, tie the branches and vines after winter pruning and put them in the middle, build a shed with wooden poles, put straw and straw bags, cover 20 cm to 30 cm, and then cover 50 cm of slippery leaves or firewood, leave a few ventilation holes along the ground, and can measure temperature and ventilation at any time. It closes at 0 o'clock and opens the following year when it is clear.

Fourth, plastic film cold protection After the winter pruning of the branches and vines bundled, put in the ditch, covered with plastic film, buried with soil around the periphery, and then cover the finch with leaves and firewood and grass more than 50 cm, leaving ventilation holes along the ground. Freezing cold protection can be used in the front of the nucleus early three methods to cover the soil 10 cm to 20 cm, from November to early December, the temperature is minus 20 hours, even watering several times, forming a thick water shell, play a role in cold protection. Mulch the soil away from the roots of the grapes to avoid frostbite to the roots.

In mid to late April of the following year, leaves and weeds are removed for the first time, and ventilation holes are opened for ventilation, and all mulch is removed in early to mid-May.