1. **Pottery Storage and Preservation**: After harvesting, clean the bulbs by removing dirt, debris, and any damaged or diseased ones. Spread them on a tile floor for 12 to 15 days to dry properly. Once dried, place them in earthenware pots. Ensure that the storage area is dry and well-ventilated, as using unglazed pottery jars can lead to moisture absorption. Each pot should hold about 80 to 100 kg of bulbs. When the pot is full, cover it tightly. It's important to note that during the early stages of storage, earthworms (or bulbs) have high respiration rates, so they need to be uncovered for proper ventilation to distribute moisture evenly within the pot. During rainy seasons, when humidity is high, the moisture content in the bulbs may increase rapidly, so covering them with a layer of cloth or paper can help control excess dampness. In hot and humid weather, water evaporates quickly, so sealing the containers tightly is essential to prevent the bulbs from drying out and rotting. Regular inspections should be conducted every 25 to 30 days during storage. Using this method, the shelf life of alfalfa bulbs can exceed six months.
2. **Fine Sand Storage and Preservation**: After harvest, store the bulbs in a cool, shaded room or basement. Construct a buried pit using bricks, and at the bottom, spread a layer of fine sand about 5 to 7 cm thick. Place the bulbs on top of the sand, then cover them with another 3 to 4 cm layer of sand. Repeat this process layer by layer, but ensure the total height of the stack does not exceed 1 meter. This method has proven effective in maintaining bulb quality and prolonging storage life.
3. **Solution Storage and Preservation**: Collect the stem bulbs, wash them thoroughly, and immerse them in a sodium hypochlorite solution for preservation. According to testing, this method can extend the storage period of the bulbs significantly. At a temperature of 0 to 2°C and a relative humidity of 98% to 100%, the bulbs can be preserved for up to 10 months. If stored at temperatures below 5°C, the preservation period can last between 6 to 8 months. This technique is especially useful for long-term storage and maintaining the viability of the bulbs.
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