How to prevent bolting in spring radishes? A detailed guide to the latest preventive measures
The most prominent problems in spring radish cultivation are freezing injury and chilling injury caused by early growth stage issues, and premature bolting in the later stage. Once radishes bolt, not only will yield and quality decline, but they will also lose their commercial value, bringing great losses to farmers. So how should spring radish bolting be prevented? Follow along with the editor to learn more.
1. Choose seeds carefully
Before introducing new varieties, it is necessary to understand the requirements of different types and varieties for low-temperature vernalization, especially for varieties cultivated in spring. For example, if southern varieties are introduced to the north and planted in early spring, premature bolting is very likely to occur. However, if seeds are introduced from a region with lower temperatures than the local area, premature bolting will not occur. Therefore, before introducing seeds, be sure to choose seeds carefully.
2. Use triple-layer covering
Spring radish cultivation should choose facilities for triple-layer covering, that is, on the top film of the arch shed, at a distance of 15 cm, add another layer of plastic film, and then add a film over the ground film. Because ventilation is needed at both ends of the arch shed, the bed should not be too long, and both sides should be compacted with clods of soil. After sowing, keep it closed and insulated without ventilation during the germination stage. Ventilation begins at the seedling stage, and after thinning and final thinning, remove the ground covering film. In terms of temperature management, maintain appropriately high temperatures in the early stage and lower temperatures in the later stage, that is, high temperature at the seedling stage to promote seed germination and seedling growth, while also preventing low-temperature vernalization.
3. Strengthen management
Before sowing, plow early, use decomposed organic fertilizer as base fertilizer, and after covering with ground film, build the shed and cover with film. Sow when the shed temperature stabilizes above 11 degrees. For sowing, open holes at a row spacing of 25 cm, sow 4-6 seeds per hole, cover with soil 2-3 cm after sowing, and close the shed after sowing to prevent low temperatures. If the shed temperature exceeds 25 degrees, ventilate appropriately to cool it down. When there are 5-6 true leaves, carry out thinning and final thinning, leaving one plant per hole. When the temperature gradually rises, remember to ventilate at noon to lower the temperature. When the fleshy root begins to expand, it is advisable to maintain mainly 18-20 degrees to prevent excessive growth from high temperatures. When the nighttime temperature is above 10 degrees, the film can be removed in due course, and after that it can be harvested. If cultivation with ground film covering is adopted, the cultivation method is not much different from open-field cultivation, because ground film covering can increase ground temperature by 2-3 degrees and can advance the sowing period by 10-15 days.
The above is an introduction to preventive measures for spring radish bolting. We hope it can help you. To learn more related knowledge, please follow us.