Carrot is a root vegetable in mid-autumn and winter, but now with the maturity of planting technology, it can be grown all year round. Therefore, with the arrival of spring, many people are planning to plant carrots. I’ll show you the high-yield cultivation techniques of carrots in spring.
1. Sowing Period
Before planting carrots in spring, we should firstly choose the varieties and control the sowing period. The varieties of carrots in spring should give the priority to those with few leaves, fast swelling speed. It is guaranteed that weight of the rhizomes can reach about two kilograms about two months after sowing. Then the average temperature of the day is stable above 10 degrees, and if the weather lasts for more than a week, you can plant. If it is a greenhouse mulch planting, or you grow them in a grow tunnel or cold frame, it should be sown in December-January. And if it is open field mulch cultivation, it should be sown in April.
2. Soil and Fertilization
The soil for planting carrots is very crucial. It needs to maintain a good permeability, drainage and irrigation capacity, softness, and sufficient fertility. The previous crop of the soil should not be the same kind of carrots. Before sowing, we should sterilize the soil and plow the soil deeply about 30 cm, spraying with chemicals for disinfection. When preparing the land, we also need to combine the work of applying basal fertilizer. The base fertilizer is based on fully decomposed farmyard manure, combined with an appropriate amount of compound fertilizer to ensure the growth of carrots.
3. Planting Density
The planting density needs our attention, and the plant-row spacing should be kept at about 40*30cm. When sowing, enough human and animal manure should be poured into each seeding hole, and then a seed is sown in each seeding hole, and then covered with about one centimeter of fine soil. Do not plant too shallowly, otherwise lodging will easily occur and affect the root shape. At the same time, the sowing should not be too deep. Too deep will delay the emergence of radish, resulting in a decrease in the rate of strong seedlings. And we also use nutrient pots to cultivate preparatory seedlings for replenishment. If the stubble is tight, it can also be transplanted into grow bags directly. It is not only easy to manage, but also can improve the utilization rate of greenhouse facilities.
4. Field management
About a week after sowing, we should pay attention to sealing the greenhouse to promote the emergence of seedlings. Because the temperature changes in early spring are relatively large, it is necessary to do a good job of seedling hardening after the seedlings are sprouted. Temperatures remain around 18 degrees during the day and around 12 degrees at night. When the seedlings have about three true leaves, it is necessary to do a good job of replenishing the seedlings. In the seedling stage, radishes do not require much fertilizer and water, so they can be fertilized without watering. Then after the late growth period, it should be topdressed twice or so. Fertilizers are generally dominated by nitrogen and potassium fertilizers. The fertilizer should not be too much to avoid fertilizer damage, but it should not be too little, otherwise it is prone to bran heart and early bolting.