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First, the choice of origin. The climate, soil, and water quality environment of the place of production must comply with the regulations for the production and management of pollution-free vegetables. Greenhouses are suitable for steel sheds spanning 4.5-6 meters. It requires deep soil, loose soil, high organic matter content, good drainage, and no pollution.
Second, soil preparation and fertilization. Before the ploughing, more than 2,000 kg of farmyard manure is fully cooked per acre. After mid-to late September to early October, tillage is carried out for 2-3 days. 75 kg of compound fertilizer per acre is used as a base fertilizer, and plowing is performed 1 time. . The surface must be flat and thin, and 2 meters wide. Then carry out soil disinfection and control of underground pests. The bactericide is selected from 50% carbendazim 600 times solution or 70% thiophanate-methyl 800-1000 times solution spray, and the insecticide can be sprayed with 48% Lester's EC 800-1000 times solution.
Third, staged sowing. Listed during the Spring Festival, the sowing date is mid-to-late September; after the Spring Festival, the sowing period is mid-to-late October. Sowing before planting fully, the sowing rate per mu is 0.15 kg. The sowing method is to use acupuncture on demand (the variety is not suitable for transplanting). The spacing of the plants is 25 cm and 30 cm, and the density is 8000 holes per mu. Sow 2-3 seeds per hole, then cover with composted soil, and pour enough water. After sowing, 90% Niles 50ml/50kg water was used to control weeding.
Fourth, field management
1. Dingling: Seedlings begin to emerge 4-6 days after sowing, and 2-3 true leaves grow after the start of seedlings. After the seedlings, one seedling per hole is set, with about 8,000 strains per acre.
2, buckle shed and management. Bai Yuchun radish is a suitable time for buckling in the middle and late November. The film was started when the average temperature dropped below 10°C on the day. This species is more tolerant of low temperatures, and it is exposed to fine weather after the shed. It is uncovered during the day and it is covered with a film when it encounters cold air or rainy weather. Before the New Year's Day, more air is released. After the New Year's Day, the temperature is relatively low, and there should be little or no ventilation. The temperature in the shed is maintained at 10-20°C.
3, fertilizer and water management. The relative humidity in the shed is kept below 70%. In the six-to-eight-leaf stage, topdressing was performed once, and 15 kg of urea per acre was applied to the water. A small amount of weeds can be removed manually.
4. Pest control. The main pests and diseases are cruciferous soft rot and aphids. To prevent cruciferous soft rot disease, use 12% of agricultural streptomycin sulfate wettable powder 10 million units of water plus 50-75 kg of water per mu, or use 57.6% of chlorothalonil dry granules 1000-1200 times spray, combined with irrigation . For controlling aphids, Imidacloprids can be used to spray water.
V. Harvesting. When the root diameter expands to 8-10 cm and the length is 25-30 cm, it can be harvested, usually before and after the Spring Festival to mid-to-late February. The petiole is preserved 5-6 cm when harvested, and is graded and packaged for sale.
Bai Yuchun radish greenhouse pollution-free cultivation techniques in autumn and winter
Baiyuchun radish is planted as a greenhouse in autumn and winter, with a growing period of 90-100 days and a yield of more than 5,000 kg per acre. It is one of the ideal varieties for anti-season vegetable cultivation.
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