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The rapeseed fertilization in winter is mainly based on the strong warming of farmyard manure such as ring fertilizer, soil fertilizer, pig manure, etc. According to the growth of rapeseed seedlings, fertilizers such as ammonium bicarbonate and ammonium chloride can be appropriately added. Immediately after fertilization, weeding and weeding, cultivating and mulching fertilizer to prevent the loss of rapeseed and fertilizer. In case of drought, it should be combined with watering and drought resistance, and water fertilization, and the effect is better.
The fertilization of rapeseed before winter or during wintering period can promote the slow growth of rapeseed in winter and enhance the ability of winter rape to resist cold. Second, the fertilizer is applied in winter for spring, which is good for early spring rapeseed; the third is to reduce fertilization in spring and prevent over-feeding in spring. The rapeseed is prosperous in the late stage; the fourth is to make full use of the winter rain and snow sensation to avoid the difficulty of topdressing during the spring drought; the fifth is the low temperature season topdressing, which can improve fertilizer utilization and reduce production costs.
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