The winter vegetables in open field mainly include cold-resistant vegetables such as garlic and spinach. Attention has been paid to the following key links in production:
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First, pour good antifreeze water and increase cold resistance. According to the soil moisture, combined with plant growth, timely overweeping wintering water, improve the ability of crops to resist cold.
Second, do a good job in film management to prevent wind blown film. In winter, when there is a lot of windy weather, if the mulch film does not cover tightly, it is easy to be blown by strong winds, which will not achieve the effect of warming and keeping warm. Therefore, before the winter comes, check the mulch film coverage of the vegetable field, and properly compact the soil to prevent the wind from scratching the plastic film.
Third, the application of crop straw or decomposed organic fertilizer, appropriate insulation. In winter, in the fields of garlic and spinach, the spreading of crop stalks such as corn and wheat, or decomposed cow dung, chicken dung, etc., can not only play a role in keeping warm, but also prevent the wind from scraping the film. 
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