What about the latest rape early bolting and early flowering?

Rape is a common vegetable, which is generally distributed in the Yangtze River basin. When planting winter rape, the time of bolting and budding is usually from February to March. If bolting and blooming before the Spring Festival, then it is the phenomenon of early bolting and early flowering of rape. The phenomenon of early bolting and early flowering will have a great impact on the yield of rape. So what should rape do early bolting and early flowering? The following editor will give you a brief introduction, let's have a look!

1. Preventive measures

1. Water and fertilizer management

When planting rape in autumn and winter, we should pay attention to watering. Whether transplanting or direct seeding, if the soil is too dry, it is very disadvantageous to the growth of rape. Therefore, it is necessary to water in time to resist drought and promote rape seedlings to grow roots and leaves. If the temperature is too low in winter, it should be irrigated in time to replenish water and maintain soil temperature at the same time. For some rape seedlings with weak growth, urea should be applied early to promote seedling growth and prevent early bolting and early flowering. On the contrary, strong seedlings do not need to be fertilized to avoid overnutrition and speed up the growth of rape.

2. Chemical regulation

When the rape 4-leaf stage, bolting stage and early flowering stage, it is the key period for rape to control its prosperity. We can choose paclobutrazol, uniconazole and other control agents for chemical control. When planting rape, if the sowing time is too early or the vigorous growth leads to the phenomenon of early bolting and early flowering of rape. Then it is necessary to use a strength control agent to spray with water, not re-spray or leakage spray. The best time to spray strength control agent is before overwintering. It can not only prevent the phenomenon of early bolting and early flowering in rape, but also improve the cold resistance of rape.

II. Remedial measures

1. Pick bolts in time

Bolting is carried out when the early bolting of rapeseed grows to about 15-20 cm. The bolting tip is removed about 8 cm, according to the growth habits of rape, if the bolting tip is removed, then the growth process of rapeseed can be delayed for about three weeks. And because the growth branch of rape is very large, bolting not only will not affect the yield, but also can increase the yield. Do not pick bolts in cloudy and rainy days, should be carried out in sunny days, after picking bolts should be properly sterilized, improve the speed of wound healing, appropriate fertilization. Then foliar fertilizer was sprayed in the later growth stage to ensure the normal growth of rape.

2. Proper fertilization

When the bolting of rape is very high or has already flowered, then it is generally not recommended to pick bolts again. At this time, Greater Cold should be properly sprayed with phosphorus and potassium fertilizer after the solar terms have passed to enhance the growth of rape. If the rape variety planted is double-low rape, then we should also pay attention to supplement good boron fertilizer. Because this variety is very sensitive to the change of boron element, it should be carried out at bolting stage and early flowering stage to meet the demand of boron element in rape.

The above is a brief introduction to how to do early bolting and early flowering of rape. That's all for today's introduction. This article is for reference only. I hope it can help you all.