Causes and control methods of early bolting of the latest carrots

The phenomenon of early bolting will occur in the growth process of carrots, which means that the fleshy roots of carrots are affected by low temperature in the early stage, and bolting occurs during vegetative growth, which will lead to more carrot fiber and can not be eaten normally. seriously affect the yield and quality. So what is the reason for early bolting of carrots? How to prevent and cure it? Let's take a look at the detailed introduction.

1. Low temperature at seedling stage

In the carrot seedling stage, if the low temperature below 15 degrees, as long as more than half a month can make its vernalization, flower bud differentiation. However, spring sowing carrots are prone to bolting because of low temperature in the early stage, high temperature in the middle stage and long sunshine. The higher the sowing is, the longer the low temperature time is, the higher the bolting rate is, and vice versa.

Control methods: when sowing carrots in spring, we should choose the appropriate sowing time, avoid the low temperature at the seedling stage as far as possible, and sow when the temperature is stable. If the seedlings encounter a low temperature climate, we should take good heat preservation measures to reduce the bolting rate.

2. Reasons for variety

In addition to environmental factors, carrot bolting is also related to its own heredity, and the natural bolting rate of some varieties is higher. In addition, the seeds are old and the vigor is low, the seedlings will grow weakly, and the bolting rate will increase in the later stage.

Control methods: varieties with strong winter and late bolting should be selected when planting, new seeds should be used at the same time, sowing should be timely according to local climatic conditions, and sowing should not be too early or too late.

3. Improper cultivation

Soil fertility and the improper proportion of nitrogen, phosphorus and potassium during fertilization will affect the stomach and kidney of carrots, indirectly lead to flower bud differentiation and lead to early bolting.

Prevention and control methods: to strengthen fertilizer and water management, choose deep soil layer, loose and fertile soil planting, fertilization mainly organic fertilizer, chemical fertilizer mainly nitrogen and potassium fertilizer, less phosphate fertilizer, reduce bolting rate.

4. Causes of growth regulators

During the growth of carrots, in order to promote their growth and improve their yield and quality, many farmers will spray growth regulators, but carrots are more sensitive to acetic acid and will promote their growth, so they should be used carefully.

Prevention and control methods: be careful when using growth regulators, spraying acetic acid or carrots have early bolting phenomenon. Growth regulators that inhibit bolting can be sprayed, such as 0.1% Mel 0.5% maleic hydrazide, which can delay the bolting time of carrots.

The above are the reasons for early bolting of carrots and the introduction of prevention and control methods, hope to help you, want to know more related knowledge, please pay attention to us.