There are taboos about growing rape.

Although the broad masses of farmers have a high enthusiasm for planting rape, some people have many, chaotic and miscellaneous varieties; others continue to plant crops, and rape can not grow and develop normally; in addition, there is the problem of white seed cropping or partial application of nitrogen fertilizer. These are taboos of rape. For this reason, we should pay attention to the following points: select high-quality rape varieties. That is, the ones with high oil yield, low erucic acid content and low glucosinolate content in vegetable cake are selected. The newly launched "double low" varieties are Zhongyouza 2, Zhongyouza 4, Zhongshuang 6, Zhongshuang 7, as well as Huaza, Ningza, Xiangza, Wanza, Youyan and other new varieties. All localities should select 1-2 leading varieties according to the local ecological environment and planting habits. Rotation should be carried out to change stubble to plant rape. Continuous stubble reduces the fertilizer supply capacity of the soil as a whole, resulting in a shortage of some elements and aggravating the disease, resulting in a 10-15% reduction in yield. Therefore, the field where rape stubble was planted last year must be planted by rotation when sowing in autumn. Re-apply base fertilizer and fertilize before the year. For high yield, rapeseed must catch autumn hair and winter strong, produce 100 kg of rapeseed, absorb 8.8-11.3 kg of pure nitrogen, 3.0-3.9 kg of phosphorus pentoxide, 8.5-10.1 kg of potassium oxide and 0.5 kg of boron. 70% should be applied when applying base fertilizer and topdressing before the year.