Causes of early bolting in cabbage

Cabbage is a kind of herb of Cruciferae, which has a wide range of distribution in the north and south of China. Early bolting is often encountered in cabbage planting, mainly because organs are formed prematurely, which leads to flower bud differentiation. It has a great impact on the yield of cabbage, and the planting efficiency of growers will be reduced as a result. So what is the reason for the early bolting of cabbage? Let's take a look at it.

1. Seedling size

The early bolting of cabbage can not be separated from the seedlings. There are two kinds of seedling size: calendar seedling age and physiological seedling age. When planting the same variety, if the calendar seedling age is the same, then the growth speed is fast. In other words, the older physiological seedlings are easily affected by low temperature and vernalization. Under normal circumstances, the vernalization standard of seedlings is generally about 6 leaves. When the leaf area is 7 cm and the stem diameter is about 0.5 cm, the bolting rate of seedlings is relatively high, so we should pay attention to control the size of seedlings and reduce the phenomenon of early bolting.

2. Temperature at seedling stage

Temperature also has a direct effect on the growth of seedlings, if the temperature is higher in the seedling stage, the growth rate of seedlings is accelerated, but it is also easy to form large seedlings. If the seedlings are too large, it will increase the probability of vernalization, so it will increase the bolting rate. Therefore, when we plant cabbage, we should adjust the sowing time reasonably according to the seedling mode to ensure that the temperature is within the suitable growth range of cabbage. The temperature is controlled to control the size of the seedlings. When the temperature is kept at about 15 degrees for cabbage seedlings, the bolting rate can be effectively reduced.

3. Planting time

Planting time is also one of the main reasons for early bolting of cabbage. If the planting is too early, the seedlings are prone to cold in late spring, delay the time of seedling delay and increase the bolting rate. However, it should not be planted too late, if it is planted too late, it will prolong the growth period of cabbage. Unable to form large balls in a suitable environment, and eventually become semi-adult plants. Therefore, we should reasonably control the planting time according to the planting area. For example, when planting in the north, it should be planted late, on the contrary, it should be planted early in the south. It can effectively avoid or reduce the early bolting of cabbage.

4. Climatic reasons

Finally, one of the reasons for the early bolting of cabbage is the uncomfortable climate. If it is an early-maturing variety of cabbage, when planted in winter, the temperature is high, it will accelerate the growth of seedlings, and there will be cold in late spring after entering spring. Therefore, it is very easy to cause cabbage bolting in advance. When planting cabbage in the south, the growth of cabbage will be inhibited because of the surplus of autumn and the fast time of entering winter. It is easy to overwinter before the ball, and then into the spring long sunshine climate, it is easy to appear early bolting phenomenon. Especially when it is warm in winter and cold in spring, the bolting rate is higher.

This is a brief introduction to the early bolting of cabbage. There are many reasons for the early bolting of cabbage. We mainly focus on prevention and strengthen management from all aspects. In order to effectively reduce bolting phenomenon. That's all for today's introduction. This article is for reference only. I hope it can help you all.