1. Selection of varieties and determination of sowing date: The carrots in the off-season spring are sown in carrots. The selection of the varieties is very strict. It must be selected late in the evening and the heat resistance is strong. Variety is good, the growth period is short. Such as red reputation five inches and so on. The minimum temperature for carrot sprouting is 7 degrees, and the sowing time for spring carrots in Nanyang area is from mid-to late March to early April. Sowing is early and prone to convulsions. If sowing is late, it is easy to encounter storms in the late growth period. Drainage is not timely. It will cause roots to fail cultivation. 2 plot selection and site preparation Carrots have deep soil, loose soil, and good drainage. They are rich in organic soils or loam. As long as the cultivation measures are properly applied on some clay grounds, they can also produce higher yields. The selection of spring carrots must be based on high-lying land that is easy to pour and easy to drain, and whether the drainage is smooth on the clay land is one of the important factors that determine the success of cultivation. In particular, the requirements for varieties with low meat quality and low cellulose content are even greater. strict. Because carrot roots are deep in the soil, if the soil is too shallow and the soil is not loose enough, the roots of the meat are easy to bend, short, and even occur. Therefore, it is required that the soil be deeply ploughed, combined with deep ploughing, and the base fertilizer should be applied in combination with deep ploughing. The basal fertilizer is preferably rotted organic fertilizer (such as the use of fresh glutinous fertilizer, prone to fork roots), the first 667 square meters of organic fertilizer 5-6 cubic meters, if there is no organic fertilizer, 667 square meters can be applied to 50 kg compound fertilizer plus a small amount of urea and potassium dihydrogen phosphate, and then deep plowing 25-30 cm, the soil blocks broken into ridges, ridge width 1.0-1.3 meters, ditch width 0.3-0.4 meters, ditch About 0.2 meters deep. The topsoil on the ridge surface must be finely crushed and leveled to facilitate sowing and germination. 3 sowing requirements In order to ensure that the carrots are neat and homogeneous, appropriate measures must be taken. First of all, we must pay attention to the quality of seeds and germination rate. If necessary, we should first conduct a germination test to ensure proper seeding rate. It is best to soak seeds first in spring so as to facilitate emergence. When the weather is dry, it is best to soak the soil and loosen it, then sow the soil. 4 seeding procedure (1) Soaking Seeds In the afternoon on the day before sowing, soak the seeds with warm water at 37 degrees Celsius for 12-16 hours, remove them and dry them, and mix them with dry sand and sow them. In order to make the sowing even, add more Sand soil. (2) Seed sowing and seeding can be. The cover soil is about 1.5 cm thick. Sowing the seeds with thick rakes 2-3 times to make the surface smooth, and the top of the seeds should be finely crushed. After sowing, tap the back face with a spade, so that the seeds and the soil are tightly bound. (3) Carrot spraying herbicide generally slower emergence, after soaking, from sowing to emergence takes 9-10 days, during which weeds are often unearthed before the seedlings, causing weeds, so the best sowing the day or the next day, each 667 square meters of herbicide 150-200ml water 50 kg sprayed sorghum, the control of the main weeds up to 80% -90%. (4) Watering After sowing, if it does not rain, it must be watered along the ditch on the sowing date, otherwise it will affect the emergence rate. When watering, water should be allowed to seep from bottom to top to keep the topsoil loose and help carrots sprout. After the spring sowing of radish sowing, a layer of mulch on the surface of the radish can increase the temperature and keep the soil surface moist. It can also prevent the soil from hardening due to raining. The mulch was removed before the carrot seedlings were to be uncovered 9 days after sowing. 5 Field Management Due to the early and mid-spring carrot growth, the temperature is more suitable for its growth, so the upper part of the spring carrot is often more prosperous, easy to cause imbalance in the distribution of nutrients above and below the ground and affect the yield. Spring radish seedlings must be subjected to thinning and cultivating, generally should be 2-3 times between the seedlings, the dense seedlings and diseased strains removed, the first seedlings when the seedlings 1-2 true leaves; seedlings 4-5 tablets When the true leaves are for the second time the seedlings (or Dingmiao); Ding Ding spacing is 10-15 cm square. See seedlings when the best way to use seedlings to prevent loosening the soil between the seedlings, causing root damage, causing dead seedlings, fork roots, affecting yield and quality. In the vigorous growth stage above the ground, the water should be properly controlled, and the cultivators should be planted to prevent the growth of fleshy roots due to the length and length of the seedlings. The root enlargement period is the period when the carrot grows fastest, and it is also the period with the most demand for water. It is necessary to fully replenish the water, and watering is best performed in the morning and at night. Carrots are usually top dressing 2-3 times, the first time before and after the Dingmiao, after the next 20 days or so top-dressing second or third fat. 6 Prevention of pests and diseases Spring carrots have less pests and diseases, and it has been observed that there are basically no other pests or diseases except for the harm of small tigers during the seedling stage. To deal with small tigers (commonly known as silkworm), dipterex, phoxim and sauteed oil cakes, wheat bran or lettuce leaves can be used as poison baits and spread in the fields before evening. 7 harvest Spring carrot from the species to the harvest for about 90 days, because the harvest period of spring carrots is hot summer, high temperatures, heavy rainfall if the harvest is not timely, in the event of heavy rain or heavy rain, poor drainage in the field, prone to fleshy root erosion phenomenon It is more obvious on the clay ground. Therefore, after the heavy rain, it must be drained immediately and flushed with well water to cool down. Once the fleshy roots grow, they can be harvested. After harvesting, if temporary sales are not finished, it can be stored in a cool, ventilated place at 18 degrees Celsius and extended to the market.
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