What are the methods for burying grapes in soil for cold protection?
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What are the methods for burying grapes in soil for cold protection?
The common measure for preventing frost in grapes during winter is to bury them in soil for cold protection, which is a key step in grape cultivation. Its purpose is not only to protect the above-ground branches and vines from safely overwintering but also to prevent the roots from freezing. However, there are also some points to note when burying the soil to prevent cold. So, what are the methods for burying grapes in soil for cold protection? And what are the precautions?
Preparation
Grapes belong to warm temperate plants and are heat-loving crops with poor cold resistance, generally using -17°C as the dividing line between burying and not burying for overwintering. The burial of grapes is usually carried out 10-15 days before the soil freezes, after pruning in autumn and before the soil temperature approaches 0 degrees Celsius but has not frozen. Of course, the specific time should be flexibly arranged according to local weather conditions. Before burying for cold protection, the vineyard should be pruned, cleaned, disinfected, watered, and frozen.
Burying Method
There are many methods of burying soil, with the direct burial method being commonly used, which is more suitable for gardens where the winter temperature is not very low and the soil is relatively fine. Another method is to first cover with organic matter, then cover with a layer of plastic sheet or color strip cloth, and finally bury the soil. This method uses less soil and has a high safety factor. At present, most grape-growing areas in China have popularized mechanical burial, but attention should be paid to the row spacing of grapes and not to damage the roots. If it is a cold greenhouse grape or an area without severe cold in winter, only the problem of pulling the vines needs to be solved, and the plastic sheet can be pressed against the soil, so there will be no leakage of wind.
Precautions
Firstly, after the soil is buried, the soil pile should be tamped to prevent wind leakage. In addition, the soil should be as far away from the roots as possible. Generally, it is 1 meter away from the rootstock to avoid frost damage to the roots. If the branches and vines are covered, the roots will freeze, which is an unnecessary loss. When pressing the vines into the soil, they can be padded at the bending point of the trunk to avoid breaking the base, which would also cause significant loss. Due to different regional and ambient temperatures, the thickness of the buried soil also varies, and since the cold resistance of each grape variety is different, the thickness of the buried soil should be determined according to local climatic conditions and grape varieties. After burying, the soil should be checked frequently before freezing, especially the northwest side of the soil pile, and soil should be added in time after hanging soil to avoid frost damage to the plants due to too thin soil layers.
Above is the method and precautions for burying grapes in soil for cold protection, hoping it is helpful to you.
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