First, cultivator soil. Before cultivating the soil, the cultivator can loosen the soil and thicken the root soil, which has a certain effect on blocking the cold wind and improving the ability to absorb heat and cold. Especially for tall seedlings, the roots and stems become shorter after earthworms are cultivated, which is conducive to keeping warm.
Second, re-apply winter fertilizer. Before the arrival of the cold, applying wax fertilizer and increasing phosphorus and potassium fertilizers can not only significantly enhance the cold-resistance capacity of rapeseeds, but also provide nutrition during the wintering period and the bolting and flowering period, ensuring balanced growth in the later period.
Third, cover cold. Use rice straw, chaff or other crop straws to keep warm in the rapeseed line, which can reduce the direct invasion of cold wind. Before the onset of the cold wave, a layer of hull ash, grass ash, and ash on fire can be sprinkled on the surface of rape leaves to prevent the leaves from freezing.
Fourth, irrigation antifreeze. Before the advent of freezing or severe cold, irrigation of rapeseed fields in time can avoid a significant drop in ground temperature and mitigate the extent of freezing damage, especially to prevent dry freezing. At the same time, the root system is tightly integrated with the soil after irrigation, which is beneficial to the absorption of water and nutrients by rape. After freezing, drainage should be cleared in time to avoid rooting due to waterlogging.
Fifth, remove early sickness. As early as the phenomenon of early inflorescence rape, will consume a lot of nutrients, so that the ability of plants to weaken the cold, should be timely picking lotus, reduce the degree of frost damage. Picking picking should be done at noon on sunny days. After picking the pods, timely apply the appropriate amount of available nitrogen fertilizer to promote the growth of rape and prevent the occurrence of frost damage.
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