Onions enter a dormant period after harvest, and the typical dormancy period is 1.5-2.5 months. After the dormant period, the onion is kept in a dormant state by using a low-temperature drying condition, that is, in a forced dormancy period. The suitable temperature for storage of onions is 0 ° C - 3 ° C, and the relative humidity is 80% or less. Humidity is too high and perishable, and it is easy to root and germinate. The following Hui Nong network Xiaobian will briefly introduce several onion storage technologies.
First, the treatment measures before and after storage
1. Stop watering one week before harvest. Must be harvested on sunny days; if harvested after rain, the bulbs may sprout in advance.
2. Bulbs must be harvested after full maturity. Remove the stalked, damaged, and diseased bulbs before storage.
3. If the quantity of storage is not large, the method of seed bulb storage can be used for storage; if the storage quantity is large, it can be piled up in a ventilated place without direct sunlight, and the bulb ball is outside the leaves, in order to facilitate ventilation and ventilation, the pile A layer of straw can be laid first.
4. During storage, especially in the early stage of storage, it should be carefully checked. If the mildew and germinating bulbs are found, they will be removed.
5. In order to reduce the loss, the stored bulbs should be treated before the release of the dormant period.
Second, storage methods
1, hanging
The dried onion must be selected again, and the soft yellow leaves are grown into a "scorpion" of about 1m, each 40-60 heads, two single scorpions are combined for one hanging, and then dried for 5-6 days, to the leaves Whole yellow, store the onion head thoroughly dry. First choose a cool, ventilated, dry house or shade, then hang the onion on a wooden stand, remember that the onion should not touch the ground, nor can it be rained or soaked in water. It is recommended not to turn the onion during storage. Although this method has good ventilation and is not easy to rot, it has poor germination inhibition effect and is therefore only suitable for short-term storage.
2, indoor storage
After harvesting, the onions are fully aired for 3-6 days (avoiding mechanical damage during harvesting), and about 30 kg of onions per bag are stored in a cool, ventilated place in the room. Moldy or rotten onions should also be inspected and removed during storage. This way the onions can be stored for three months.
3, outdoor storage
Choose a site with high terrain, dry soil and good drainage. First, put the straw on the ground, and lay the straw on the ground. Each bag of onion is about 30 kg and grows 3 m in length, 1-1.5 m wide, 1 m high, and the top cover. 3--4 layer mat or a layer of linoleum, surrounded by two layers of mats, tied tightly with rope, keep the environment of the onion in a dry and ventilated environment, check the leaks after rain, if there is rain It should be handled in time. Generally, it does not flip during storage, and this method can be stored for more than 3 months.
4. Storage in mechanical refrigerators. Cold storage is a good storage method for onions. When using this method, the harvested onions must be pre-cooled for 1-2 days, basketed or stacked, or placed in a woven bag for storage or palletizing. The warehouse maintains a temperature of about 0-3 °C and maintains a relative humidity of 80% or less. However, due to the high humidity of the refrigerator, the onion bulbs tend to grow adventitious roots, so it is necessary to pay attention to ventilation and ventilation, and remove the moldy onions in time. This method can be stored for more than half a year.
The question about how to store onions is shared here. China's onion industry is currently in a good development situation. With the understanding of onion nutrition and the growth of downstream market demand, it is believed that China's onion industry is running a new development opportunity.
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