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(2) Yangmiangou transplanting: It can increase soil temperature and reduce freezing damage. The direct effect of cold currents can also be avoided due to the lower stem segments and stem growth points of the rape.
(3) Pre-winter soil and cover soil: Protecting the stem and heart is the key to anti-freezing. Through soil and cover soil, ease the rapid changes in the temperature of the stem segment, but also reduce the degree of leaf transpiration, the extreme minimum temperature in winter areas slightly higher, in dry and frozen years or for 5 to 6 leaves below the seedlings should be used to cover soil measures; Wet winter weather, can adopt the method of ramming soil, and then cover the soil before thawing after freezing. Cover soil should not be too thick, the depth of 4 ~ 7cm is appropriate, too shallow does not work, too deep affect the growth of spring.
(4) Re-apply wax fertilizer to promote strong seedlings: Apply organic fertilizer between the rows before wintering or early winter, such as composting or excrement of 15-20 tons/mu, and adding 100-150 tan/mu. If Miao Wang can lightly.
(5) Increase the cover: Before winter, covering rape seedlings with soil miscellaneous fertilizers, grass ash, crop stalks, etc., can maintain the ground temperature to avoid direct damage to the leaves from cold air, and can also bridge the earth seams to prevent air leakage hanging seedlings.
(6) Preventing early squatting and early-flowering: Early seeding of rapeseed grows faster, and when it encounters higher temperatures before winter, it is prone to premature pods and early flowering, so that the cold resistance of rape can be reduced, and it is prone to reduce production due to freezing injury. . Therefore, on the basis of cultivating strong seedlings and early plantings, we will strengthen field cultivation management. The rapeseed field with early planting, strong growth, and tendency to grow crops was sprayed with paclobutrazol solution before and after December 20th. The early pods that had emerged should be promptly removed, and the appropriate amount of fast-acting fertilizer should be followed to promote the development of branches and improve branching. The amount of knot angle.
During the winter, catch six oils from the cold
(1) Irrigation of winter water: Improving the water content in the field is an effective measure to reduce the damage caused by freezing. Winter irrigation in arid conditions is very beneficial to the fight against cold and frost.