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Main Techniques of Soilless Pantry for Sprouts
The sprout-free vegetable disc planting process can be summarized as follows: seed selection → soaking → sowing, stacking, and priming → transferring to the production workshop → growth management → harvesting.
1. **Seed Selection**
High-quality seeds are essential for successful sprout production. The selected seeds should have a germination rate of over 95%, high purity, large size, fast shoot growth, strong disease resistance, high yield, slow fiber formation, soft texture, low cost, stable supply, and no contamination. These characteristics ensure uniform growth and reduce the risk of spoilage during cultivation.
2. **Seed Preparation and Soaking**
Before sowing, seeds are carefully sorted to remove any damaged, discolored, or moldy ones, along with impurities. After sorting, seeds are washed with clean water and soaked in a container where the water volume is 2–3 times the seed volume. The soaking continues until the seeds absorb about 95% of their weight in water. Once fully soaked, the seeds are rinsed, drained, and ready for sowing.
3. **Sowing and Pre-germination**
Seeds are evenly distributed on seedling trays. Depending on the type of sprout, sowing can be done in one or two stages.
- **One-stage Sowing**: This method is commonly used for fast-germinating crops like peas and buckwheat. After cleaning the tray and preparing the growing medium, seeds are sown uniformly. The trays are stacked and placed in a germination area. Daily checks are required, including turning the trays to ensure even growth and misting them without allowing standing water, which could lead to mold.
- **Two-stage Sowing**: This method is suitable for slower-growing sprouts or those prone to mold. After soaking, seeds are placed on a damp cloth inside the tray, then covered and kept in a controlled environment. Seeds are checked daily, and the moisture level is maintained through regular spraying. When the sprouts reach 1–2 mm in length, they are moved to the next stage, following the same procedures as one-stage sowing.
4. **Release and Growth Management**
Once the sprouts reach the desired height (as outlined in Table 1–2), they are transferred to the production workshop. Light conditions vary depending on the crop—some require bright light, while others thrive in lower light. Temperature and ventilation must be carefully managed to maintain optimal growing conditions. The air humidity should be kept around 85%, with misting applied 3–4 times daily to ensure proper moisture levels without overwatering. Regular monitoring and adjustments help ensure healthy, uniform growth throughout the production cycle.