Red milk grapes in winter without burying the cold can be, generally believe that winter -17 ℃ absolute minimum temperature isothermal line is our grapes in winter burying the cold and not burying the cold in the open field overwintering demarcation line. China's grape winter cover and not cover the demarcation line roughly from Shandong Laizhou to Jinan, to Henan Xinxiang, Shanxi Jincheng, Linyi, Shaanxi Dali, Jingyang, Qianxian, Baoji, Gansu Tianshui, and then south to Sichuan Pingwu, Malcolm, Yunnan Lijiang line.

The area south of this line of grapes without cover can be safe overwintering; and north of this line in the winter absolute low temperature of -17 to -21 ℃ between the region, the need to bury the soil to prevent the cold light cover in order to be safe overwintering; and in the winter of the absolute minimum temperature of -21 ℃ line of the north of the region of cultivation of grapes, the winter should be buried in the soil to prevent the cold tight cover, due to the improper prevention of the cold, so that the yield and benefits of its serious impact on, light Branches and vines dry, buds frozen, branch surface mold, buds black, delayed germination, reduce production and income; heavy will be the death of the whole plant. Improve the grape overwintering buried soil, related to the yield of grapes, quality, life, the key to efficiency. China's agricultural technology network will be the grape overwintering buried soil technology is introduced as follows:

Buried soil, from the grape planting rows of one meter away from the place to take the soil, the more the soil is dry, the better. In 10 days before burying the soil should be buried soil digging up, let it air-dry standby. When burying the soil will be patted fine, without bumps, buried to 25 centimeters thick. If there is a drought and watering is needed before wintering, it must be done 15 days before burial. When burying the soil under the grape rows and racks can not have dead branches and leaves, not to mention the accumulation of water or ice. When the leaves dry after winter pruning, cut at the end of October after the burial of the soil according to the above requirements, which can avoid the harm of heavy early frost.

When the soil buried to 25 centimeters, and then take half-dry not wet soil thickened to 30 centimeters, with a shovel gently patted solid can be. Buried soil must be buried, buried tight, leaving no gaps. In the process of burying the soil, we must often check, a dew wind, immediately replenish the buried, buried tight, still dry buried wet shoot.

The next year's grape strips out of the ground to be delayed until early May. Because of the buried soil dry, the temperature rises slowly, not only will not smother the strip, but also to avoid the harm of heavy late frost. Can make the grape strip buds do not freeze, not mold, branch buds intact, reliable results.