Preventive measures for bolting of spring radish

The most prominent problem in the process of cultivating radish in spring is the freezing and chilling injury caused by early growth, and bolting in the later stage. Once bolting occurs, not only the yield and quality of radish will decline, but also the commodity value will be lost. great losses to farmers. So how to prevent bolting of spring radish? Let's get to know it with the editor.

1. Careful selection of species

Before introducing new varieties, it is necessary to understand the requirements of different types and varieties for low temperature vernalization, especially the varieties cultivated in spring, such as the southern varieties introduced from the north in early spring, then it is easy to appear the phenomenon of early bolting. If the varieties are introduced from areas with lower temperatures than those in this area, the phenomenon of early bolting will not occur, so careful selection must be taken before introduction.

2. Adopt triple coverage

The cultivation of spring radish should choose facilities for triple mulching, that is, 15 cm apart from each other on the top film of the arch shed, and then cover the plastic film on the plastic film, because it is necessary to breathe at both ends of the arch shed, so the border should not be too long and should be compacted with clods on both sides. After sowing, the germination period is closed, the heat preservation is not ventilated, the young seedlings begin to breathe, and after the seedlings are fixed, the ground film mulching is removed. In temperature management, it is necessary to maintain appropriate high temperature in the early stage and low temperature in the later stage, that is, high temperature in the seedling stage to promote seed germination and seedling growth, and prevent low temperature vernalization at the same time.

3. Strengthen the management

Must be ploughed early before sowing, with rotten organic fertilizer as the base fertilizer, after covering the plastic film, build a shed, cover the film, and wait for the greenhouse temperature to be stable above 11 degrees to sow. Sowing can open holes according to the row spacing of 25 cm, sow 4-6 seeds in each hole, cover soil 2-3 cm after sowing, and close the shed after sowing to prevent low temperature. If the temperature in the shed exceeds 25 degrees, it can be properly ventilated and cooled. When there are 5-6 true leaves, one seedling will be fixed in each hole. When the temperature gradually rises, remember to ventilate at noon and lower the temperature when the fleshy root begins to swell. It is appropriate to keep 18-20 degrees mainly to prevent the high temperature from growing. When the night temperature is above 10 degrees, the film can be removed in time, and then it can be harvested. If plastic film mulching is adopted, there is no significant difference between the cultivation method and the open field, because plastic film mulching can increase the ground temperature by 2-3 degrees and advance the sowing date by 10-15 days.

The above is the introduction of spring radish bolting prevention measures, hope to help you, want to know more related knowledge, please pay attention to us.