First, the cultivation season and variety selection China's carrot cultivation is mostly in the summer and autumn, timely sowing is an important condition to obtain high yield and high quality. The northeastern region can be planted from the end of June to the end of July. Different sowing times are different for the selected species. Planting seeds in the summer and autumn may be based on the following principles: 1. Select varieties that have been cultivated in the north and have been successful or have a large cultivation area. 2. Choose a popular, easy-to-sell variety on the market. 3. Select varieties with strong adaptability and moderate growth period. 4. Select good quality, high nutrient content, suitable for processing varieties. Second, soil selection and soil preparation Fertilization Carrots have higher requirements for soil, and should choose deeper plough layer, loose soil, well-drained sandy loam soil or loam soil. Generally, the former pods are scallions, cabbage pods, and grain crops. Cultivation is generally ridge cultivation. Before soil preparation, we must first plough the stubble and then apply it to the base fertilizer. Generally, every 667,000 square meters, 3,000 to 4,000 kilograms of decomposed organic fertilizer is applied, some ash and 1 to 2 kilograms of bio-potash fertilizer, and 30% of the organic fertilizer is best blended. Chicken droppings. Finally deep ridges. If the fertilizer is not enough, it can be applied in the form of ridge cracking fertilizer, ridge width of 65 to 70 cm. Third, sowing and sowing after the management of the ridge in the north mostly used seeding sowing method, in the ridge out of 20 to 25 cm wide, 2 to 3 cm deep ditch, the seeds evenly sprinkled in the ditch, generally every 666.7 square The amount of rice used is 300 grams. In order to ensure uniform seeding, an appropriate amount of fine sand can be incorporated into the seeds. After sowing, the cover soil is 1 to 2 centimeters, and then it is pressed and watered. In order to maintain the moisture in the soil and prevent the sunlight from being exposed to high temperatures, some wheat straw or straw can be covered on the ridge after sowing, and the grass cover can be gradually removed after emergence. Carrot seedlings are long, but also in the high temperature and rainy season, all kinds of weeds grow quickly, and herbicides can be sprayed after sowing to prevent the growth of weeds. Using 33% “Shi Tianbu†EC to spray 150 ml of water and 75 kg of water per 666.7 square meters, the effect is very good. Two seedlings are to be planted before seedlings, and the first seedlings are carried out when the seedlings are 2 to 3 leaves. The seedlings are not normally grown, weak and sown, and the seedlings are separated by 3 cm; the second seedlings are in the seedlings. When 4 leaves are carried out, leave the seedlings at a distance of 6 cm. Each time the seedlings are combined with cultivator loose soil. After the first thinning, weeding is still required. Herbicides can be used. The method of use is the same as after sowing. IV. Irrigation and Fertilization Carrots have strong drought tolerance and have less demand for fertilizers than other crops. However, to produce high-quality and high-yield products, we must strengthen fertilizer and water management. After sowing until the emergence of seedlings, if it is rain-free, it should be continuously watered to keep the soil moist. Seedling seedlings after the water is not large, it is not appropriate to water, so that the soil see dry see wet, in order to facilitate hair roots, prevent seedlings grow. The seedling period coincides with the rainy season. After the heavy rain, it is necessary to drain water in time. After the seedlings are set, they should be poured with water once and the seedlings should be cultivated. When the fleshy root begins to swell, the seedlings are completed. From the time when the fleshy roots swell to 15 days before harvest, they should be watered in time to keep the soil moist to promote the growth of fleshy roots. Carrot seedling period requires a small amount of fertilizer, adequate base fertilizer generally do not consider top dressing, if you need to top-dressing can be combined with irrigation after the second thinning treatment of organic fertilizer, can also apply urea, apply 10 kg per 666.7 square meters to promote Seedling growth. After the flesh root enlarges, the amount of fertilizer is required to increase. With the heavy fertilization with water, potassium fertilizer should be added in the application of organic fertilizer. The application of potassium sulfate may be 10 kg for 666.7 square meters or 20 kg for 666.7 square meters for compound fertilizer. The last cultivator before the mulching of the leaf culms, the fine soil was cultured to the root head to prevent the roots from expanding and then exposed to the ground, producing a blue head and affecting the quality. Fifth, harvest and storage of carrots from sowing to harvest time, according to the different varieties of different growth period, early maturities 80 to 90 days, late-maturing varieties 100 to 140 days. In general, the fleshy roots are fully swollen and can be harvested when they meet the requirements of the commodity. The harvest is too early, the fleshy root is not fully expanded, the yield is low, and the quality is poor. Harvested too late, easy to cork, lower quality.
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