In winter, rape seedlings must not only have larger seedlings, strong seedlings, but also have strong cold resistance. Therefore, based on the application of base fertilizers, cultivation of strong seedlings, and timely transplanting, the seedlings of winter rape are mainly Should do a good job of the following measures: First, early application, give enough seedlings. Early application, application of sufficient seedlings to promote early-onset strong seedlings, generally after 7-10 days after transplanting to raise seedlings fertilizer, fertilization method should be based on the characteristics of seedlings need to gradually increase the amount of fertilizer, first light after the thick, from less To many, to apply nitrogen fertilizer-based principle of topdressing, to apply sufficient basal fertilizer field, topdressing urea, biogas and other fast-acting fertilizer 1? 2 times, the base fertilizer deficiency should pay attention to increase phosphate fertilizer, potassium fertilizer, boron fertilizer. The second is to strengthen pest control. The main insect pests in rape seedlings include ground tiger and cabbage caterpillar, which can be mixed with base powder or zinc pyrithione. The main diseases are white rust, etc., and carbendazim, thiophanate-methyl, and carbendazim can be used. Such as spraying; serious weeds in the field to be removed in a timely manner, the choice of acetochlor, cover grass and other control.
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