First, the premium white No. 1 radish is a top-tier variety developed by the company. This new selection features a fleshy, white root with a crisp, juicy texture and a mild flavor, making it ideal for fresh consumption. The roots are long and cylindrical, measuring 20-25 cm in length and 4-6 cm in diameter. They have a very light or almost no spicy taste, and are resistant to cracking and mosaic disease. The growth cycle lasts about 55-60 days, with each plant weighing between 1-1.5 kg. This variety can be planted from November to March of the following year, either in greenhouses, sheds, or open fields once the spring temperature rises. It is less prone to issues like bolting or root splitting, especially when planted at the right time.
Second, the improved white jade spring radish is a South Korean variety known for its high quality. It has green leaves, a smooth white skin, and a dense, non-cracking root. This variety is highly resistant to twisting, rapid swelling, and fibrous roots. It can be harvested approximately 60 days after sowing, making it a fast-growing option for early spring planting.
Third, the improved Chinese white radish is another South Korean introduction. It has fewer leaves, a smooth white skin, and a long, cylindrical root. Like the previous variety, it is resistant to twisting, cracking, and fibrous development. It also reaches maturity in about 60 days, making it a reliable choice for farmers looking for quick harvests.
Key cultivation tips for spring radishes include:
1. Sowing Date: The best time to plant is from late August through the following year, with covered film planting suitable for November. Greenhouse planting should take place between December and January. Planting too early may lead to premature bolting, while planting too late increases the risk of pests and diseases.
2. Soil Preparation and Fertilization: Choose a deep, loose, and fertile soil. Apply 2000 kg of well-decomposed manure per acre, along with 35 kg of compound fertilizer and 1 kg of boron as base fertilizer to ensure rich nutrients for healthy growth.
3. Sowing Technique: Use on-demand sowing, placing 1-2 seeds per hole. Maintain a spacing of 35 cm between rows and 20 cm between plants. After sowing, cover the soil with a plastic film. Use approximately 90 grams of seed per acre for optimal germination.
4. Field Management: About 10 days after sowing, remove any damaged cotyledons and thin out weak seedlings. Ensure the film is removed promptly if needed. In case of drought, water the field immediately but avoid compacting the soil. Apply top dressing twice: first with 25 kg of compound fertilizer per acre after the shoulders start to appear, and then again half a month later with the same amount.
5. Pest and Disease Control: Common pests include aphids, leaf miners, and vegetable caterpillars. Diseases such as black spot and downy mildew may occur. Farmers should monitor the fields regularly and apply appropriate treatments based on local conditions.
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