Choose good breeds. Choose a variety that has a short growing period, strong cold resistance, late bolting, and a hollow shape. At present, there are many radish varieties suitable for spring cultivation, such as white jade spring, spring white jade, spring radish 9646, and Changchun big root. Land preparation. Select soil with loose soil, Mushi rotted 3,000 kg of organic fertilizer and 30 kg of compound fertilizer. Fertilizer is applied at one time before site preparation and then tilled. The squid was made into a turtle shape with a height of 25 to 30 cm and a width of 1 m. Each pod was planted in two rows with a 30 cm spacing and a row spacing of 40 cm. Proper sowing. When planting spring radish, the sowing period should be strictly controlled and must not be sown prematurely, because the plants are prone to convulsions in advance under low temperature conditions. In general, seeding should be performed when the surface soil temperature reaches above 10°C. In actual production, it can be flexibly controlled according to the cultivation facilities and the selected varieties. Planting in greenhouses can be planted from late January to mid-February, and harvesting begins in early April; open-field mulching can be planted from mid-March to early April and harvested from mid-May to early June; If the shed is covered with a plastic film, the sowing date can be advanced to mid-March. Sowing should be used sowing, each seed sowing 1 to 2 seeds, mu sowing volume of 100 to 200 grams. Cover 0.5 cm thick fine soil after sowing, then cover the film. Field management. 4 to 5 days after sowing can be emerged, after the emergence of seedlings in a timely manner to split membranes induced seedlings, seedlings grow to 2 to 3 leaf during the seedlings. About 20 days after sowing, the fleshy root of the radish began to expand. At this time, the mud was pressed against the film break to prevent the film from being lifted. The optimum growth temperature of spring radish is 12°C or more. The management of the early growth period should be based on heat preservation, appropriately increasing the temperature in the shed, and promoting the growth of rosette leaves. In case of strong cold air, cold-proof materials should be stamped. In the late growth period, when the temperature rises, it should be ventilated and cooled in time. During the day, the temperature in the shed is controlled between 20°C and 25°C. At night, the temperature inside the shed is controlled at about 15°C. The shed film and greenhouse film are gradually removed depending on the weather conditions. After the middle of April, the greenhouse film can be removed for open cultivation. During the growth process of spring radish, watering is generally not required, and watering is only performed when the soil in the trench is white. During the root swelling period of radish, the water requirement is larger, and it may be better to use drip irrigation when water can be soaked in soil moisture. If furrow irrigation is used, it should be carried out at noon on sunny days, and the water should be ditched and drained for 2 hours after filling. The first top dressing was carried out 30 days after sowing, and the second top dressing was made about 45 days later. When composting, 25 kg of compound fertilizer per acre can be used to irrigate the root of the liquid fertilizer with a concentration of 0.5%. If the soil moisture is high, it can be applied at a depth of 10 cm from the root of the radish. Pest Control. The pests are mainly aphids and cabbage caterpillars, which can be controlled by pesticides such as ecbenaryin and insecticides. The diseases are mainly downy mildew and black rot, which can be prevented by adopting crop rotation and enhanced ventilation. Such as the use of drugs to prevent disease, downy mildew can be alternately sprayed to kill, mancozeb and other liquid medicine, black rot available agricultural streptomycin, copper preparations and other liquid irrigation. Timely harvest. When the fleshy root diameter is more than 5 cm and the weight is about 0.5 kg, it can be harvested in batches. When harvesting petiole leaves 3 to 5 centimeters cut, cleaned after listing, if you do long-distance transportation, do not wash.
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