In early spring, the awning carrots in the shed are about to emerge. After the emergence, the following management steps should be taken care of: Prevention of underground pests, beetles, ground tigers, and other underground pests will not only result in dead seedlings, but also increase the number of malformed carrot roots. Once there is an infestation of the ground pests, bait can be used to seduce, that is, 50% phoxim EC 50 ml plus 0.5 kg water and 5 kg of sauteed wheat bran are applied to the seedling roots. Wind protection is a very important task before the removal of the arch membrane, especially after the seedlings are set. Therefore, the compacted soil should be sufficient and stepped tightly. When it is found that there are cracks and holes in the film, it should be repaired as soon as possible. Dingmiao and strong seedlings From late March to early April, when the carrot plants grow to 3-5 true leaves, the young plants are planted at a spacing of 12-14 cm, the bad plants are eliminated, and the seedlings process is combined with cultivating tillage weeding. The cultivator should be shallow. So as not to hurt the root. Watering is usually done 5-7 days after the seedlings are set, the amount of watering should be small, and 8-10 kg of humic acid should be applied per acre with water. When the maximum temperature on the day of release is close to 25°C, the decidua should be released as appropriate. Several arched membranes were covered with earth, and the truncated arches were used to make the membranes a tuyere. At the beginning of the morning, it was opened in the morning and it was closed in the evening and the membrane was re-compacted. Afterwards, the number of tuyere gradually increased, the tuyere was no longer closed, and the amount of ventilation increased with the temperature. Pouring root water, squat root carrots grow to 8-9 true leaves, ie meat root length to 0.6-0.8 cm, begin to enter the underground root expansion period, which is the period when carrots need water and fertilizer. Can be combined with watering per acre to apply multi-element compound fertilizer 20-30 kg, while spraying 0.2% -0.3% of potassium dihydrogen phosphate.
