Strengthen winter rapeseed management to prevent frost damage

When rape enters the wintering period, if the field is improperly puddled, it is vulnerable to freezing injury. After being frozen, rapeseed has caused deficiencies in trees and ridges, and is more susceptible to disease than normal rape, which seriously affects the yield. Therefore, before the winter comes, we must do a good job of field management, do a good job of preventing freezing and keeping warm, in order to promote the normal growth of rapeseed, accumulate more stored nutrients, ensure the whole seedlings, strong seedlings, and safe winter. The specific measures are as follows:

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. The soil is suitable for 8-10 cm.

Second, re-apply winter fertilizer. Before the arrival of severe cold, applying wax fertilizer and increasing phosphorus and potash fertilizers can enhance the cold-resistance ability of rape, on the other hand, it can provide nutrients for overwintering and bolting and flowering to ensure balanced growth in the later period. Generally, 1000-1200 kilograms of cooked manure is applied per acre, combined with applying 10-15 kilograms of phosphate fertilizer and 5-8 kilograms of potash fertilizer, which can significantly improve the ability of rape to resist cold.

Third, antifreeze irrigation. Before the advent of freezing or severe cold, irrigation of rapeseed fields in time can prevent a significant drop in ground temperature, mitigate the extent of freezing damage, and especially better prevent dry freezing. At the same time, after irrigation, the root system is tightly integrated with the soil, which is beneficial to the absorption of water and nutrients by rape. After the ice is frozen, the gutter shall be drained in time so as not to damage the roots.

Fourth, cover cold. Use rice straw, chaff or other crop straws to keep warm between the rows of rapeseed, and reduce the direct invasion of cold winds. Before the onset of the cold wave, sprinkle a layer of hull ash, grass ash, and ash on the surface of rapeseed. Prevent leaves from freezing.

Fifth, remove early sickness. If early rape occurs, rape will consume a lot of nutrients, reduce the cell concentration of plants, weaken the ability to resist cold, and pick up pods in time to reduce the degree of frost damage. Picking picks are done at noon on sunny days. After picking, picking up the appropriate amount of available nitrogen fertilizer in time can promote the growth of rape and prevent freezing damage.

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