Field management carrots can be planted about 10 days after sowing. After the seedlings are out, choose sunny and windless days. It is best to remove the cover wheat straw or mulch film in the morning. In the cold, windy days, the cover is easy to "flash seedlings". Since the film cover time is short and there is little damage, it can be stored and reused.
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When the seedlings grow 2 true leaves, choose the first seedling at noon on a clear and windless day, the seedling distance is 2 cm to 3 cm, and the seedlings are 3 to 4 pieces of true leaves. The distance is about 10 cm. After the seedlings are planted, shallow cultivating is started once, combined with cultivating, and soil is loosened, weeded, and soiled. Carrots in the germination period, seedling period positive temperature, ground temperature is low, unless it is particularly dry, it is generally not suitable to water, until the carrot fleshy roots expand at the beginning, the temperature gradually rises when the water begins to water. Carrot fleshy roots need to have the most fertilizer and water in the middle and late growth stages, and should supply sufficient water and fertilizer in time to keep the soil moist. If the watering is insufficient, the fleshy roots are small and rough. Uneven water supply can easily cause cracking of fleshy roots. Generally, the top dressing is 2 times to 3 times, and each hectare (15 mu ) is topdressed with roots with 32.5 kg of potassium dihydrogen phosphate and 45 kg of water plus 1500 kg to 1875 kg. If it is found that the aboveground growth is too strong, it is sprayed with 5% paclobutrazol WP 1500 times to promote the expansion of fleshy roots. Carrots have fewer pests and diseases, but they are susceptible to aphids in the later stages of growth. They can be sprayed with 40% omethoate 1000 times to 1500 times or 2.5% deltamethrin ( enemy kill ) emulsifiable concentrate 2500 times.
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Source: China Agricultural Promotion Network
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