Five measures for rape freeze protection
The cultivating soil before cultivating the soil in the cultivator soil can loosen the soil and thicken the root soil layer, which has a certain effect on blocking the cold wind invasion and improving the ability of endothermic insulation and cold resistance. Especially for tall seedlings, the roots and stems become shorter after earthworms are cultivated, which is conducive to keeping warm.
Re-application of winter fertilizer Before the arrival of cold, applying wax fertilizer and increasing phosphorus and potassium fertilizers can not only significantly enhance the cold-resistance of rapeseed, but also provide nutrients for overwintering and bolting and flowering to ensure balanced growth in the later period.
Covering cold straw, chaff or other crop straws to keep warm between the rapeseed lines can reduce the direct invasion of cold winds. 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.
Before flooding, freezing, freezing, or freezing cold, irrigation of rapeseed fields in time can avoid a significant drop in ground temperature and mitigate the degree of freezing damage, especially for preventing 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.
Removal of early indica oilseed rape, if it occurs, will consume a large number of nutrients, so that the plant's ability to resist cold is weakened. Picking shall be timely to 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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