After the light snow, some areas will continue to enter the snow season. Whether it is a strong cooling or a blizzard, it will have an adverse impact on the growth of crops. The most affected crops are winter wheat, vegetables and fruit trees. So what measures should be taken to prevent cold crops?
Winter wheat. For wheat in Hubei and other places in the Yangtze River Basin, rain and snow are not conducive to the emergence of wheat fields, and drainage and loosening should be carried out to promote root development. Under the condition that the temperature of the low temperature soil is high, the rust is prone to spread, and it is necessary to prepare for prevention and treatment as early as possible. It is necessary to adopt soil cultivation measures, such as clearing ditch, loosening soil, and withdrawing to achieve the purpose of ventilation and warming. Only in the farmland where the bottom fertilizer is not really lacking nutrients, if necessary, the phosphorus and potassium fertilizers can be applied in combination with the cultivated loose soil, and a small amount of nitrogen fertilizer is applied at the same time. The role of phosphorus and potassium fertilizer is to promote the roots of wheat seedlings and improve the cold resistance of crops. It is best to cover the "warm dung" to prevent freezing. Covering materials such as rice bran, broken straw, grass ash, grass charcoal and other organic fertilizers, etc., these materials can be used to change soil after being decomposed and ploughed into the soil.
vegetables. Winter storage Chinese cabbage is in the process of harvesting. Any vegetable field that controls water will be damaged to a small extent. When it is harvested, some outer leaves can be peeled off. If the water is poured in front of the vegetable field, snow and ice are coming. The loss of the dish will be larger, especially those cabbages that are watered in advance in pursuit of high yield. The body tissues contain more water, and the damage is severe after the arrival of heavy snow. For spinach, pakchoi, etc. of wintering leafy vegetables in the open field, after the cold rain and snow, the leaves are frozen, and measures such as clearing snow, heat preservation and cold protection should be taken in time. In areas where the winter storage of Chinese cabbage is seriously damaged, the production of fast leafy vegetables and sprouts is arranged, and seedlings in protected areas are seized. Ice and snow have a great impact on the production of vegetables in greenhouses. For the management of vegetables that are not crushed in greenhouses, the first is to clean up the snow on the top of the greenhouse and adopt appropriate ventilation and heat preservation measures to prevent the use of greenhouses for the production of vegetables after the snow; The second is to control water and control nitrogen, to prevent the growth of cucumbers, tomatoes and other vegetables.
Fruit tree. There are two steps that can be considered. First, once the orchard is covered by heavy snow, the snow should be removed from the branches in time to prevent the branches from being crushed, and at the same time, the tree should not be damaged twice. Then use straw straw to wrap the trunk and cover the tree tray to keep warm; in the nursery, cover the straw and film in a large area. For late-maturing orchards that have not yet been picked, timely remove the snow and thin ice from the fruit area and harvest as soon as possible to prevent frostbite on the fruit surface. Second, for frozen fruit trees such as citrus trees, after the temperature rises steadily after snow, timely trimming is appropriate. Take measures of small injury, leaf cutting, slug pruning, and large wound sawing; if the branches are intact, the leaves are not falling, artificially assisted defoliation as soon as possible; the branches and stems that are obviously frostbite are trimmed in time. The cuts should be accurately controlled and protected by waxing. For frozen dead fruit trees, we should remove them as soon as possible and replant new seedlings.
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