How long does fresh onion last and how long can the onion last

The storage of onions should be yellow or red varieties that are resistant to storage. Onions are harvested when 2 or 3 leaves turn yellow and begin to lodging, and the outer scales of the bulb dry out. Stop irrigation 5 to 7 days before harvest to reduce the moisture content of shallots and promote ripening.

The following methods can be used to achieve the effect of storage and preservation. 1.Hanging Method.

After the onion is harvested, it is dried for 3 4 days on a sunny day, and the dried onions are braided, each about 1m long, and the two are combined to hang as one, and hang on the tripod of the ridge or under the eaves, or a well-ventilated hanging room. 2.Basket storage method.

Tie the dried shallots into small handfuls and pile them into round stacks, the shallots are outward, the leaves are inward, and they are stacked once every 4 5 days, and they must not be rained. When the shallots are fully dried, remove the leaves, put them in wooden baskets or bamboo baskets, and store them in the warehouse. 3.

Kang Tibetan method. Cut off the green onion leaves, dry the onions for 3 to 4 days, put them in a bamboo sieve, and hang them at a height of 2 m above the stove where the fire is often lit.

Onions can last for more than three months. However, in the process of preservation, it should be placed in a dry and dark environment to avoid dampness of the onion, and it is best to cover it with plastic wrap and put it in the cold dismantled warehouse, and the temperature should be kept at about minus two degrees Celsius, so that the preservation time of the onion can be extended. Onion is a perennial herbaceous plant of the family Liliaceae.

Native to western Asia, it is widely cultivated in China and abroad. It is one of the main vegetables in China. China's onion production areas mainly include Fujian, Shandong, Gansu, Inner Mongolia, Xinjiang and other places.

Morphological characteristics: Onions are biennial or perennial herbs. string-shaped, dark green cylindrical hollow leaves with waxy surface; The leaf sheath is thick and scaly, dense around the short stem, forming a bulb (commonly known as shallots); umbel-shaped inflorescences with small white florets; Capsule.

The rhizome is covered with a thin layer of skin (white, yellow, or red) on the outside, and layers of flesh on the inside, usually white or yellowish.

Onions can be stored in a cool, dry, dark place for about 30 days and at room temperature for a week.

Common storage methods for onions:

1. Indoor storage method.

Choose a place with high and dry terrain, ventilation and shade, use sleepers, straw and other materials to pave the bed, and place the dried onion braids on it in a staggered manner, and pave a rectangular stack with a slightly higher middle middle. The top of the stack is covered with several layers of reed mats to prevent rain from drenching in and keep the stack dry.

2. Basket Tibetan method.

After the onion is harvested, the selenium is dried, and the leaves turn yellow and bundled into small piles into round stacks, the shallots are outward, the leaves are inward, and a hollow cone is formed inside. Once the shallots are dry, remove the leaves and put them in a basket or box. Each basket is 20-30 kg, stacked in the cellar or in an ordinary warehouse.

3. Hanging Tibetan method.

The dried onions are braided into braids, each about 1 meter long, and the two are combined into one hanging, with 80-100 heads each. Hang the braided onion braids on a shelf, so that the braids are 10 cm off the ground, and surround them with mats, taking care to prevent rain. After winter, it can be stored indoors or in a storage warehouse.

1. Onions can only be stored at room temperature for about three months, but if they are stored in the cold reed closure bank, their storage time can be greatly improved, and the cold storage can not only improve the onion storage time infiltration, but also effectively ensure the quality of the onion. Onion cold storage is currently one of the important ways to keep onions fresh.

2, onion preservation cold storage is through low temperature storage to extend the extension time of onions, the most suitable refrigeration temperature of onions is minus 2, the temperature before storage is higher onions, it can not be directly stored, must first cool the onions at a lower temperature for a while, each time the amount of storage is 10% of the storage capacity is better.

3. The onion must be coated with plastic wrap before storage, to ensure the quality of onion storage, and at the same time, attention should be paid to ventilation to avoid rotting caused by no ventilation in the place where the onion is placed.

4. Onions should be watered about ten days before harvesting, which can better improve the storage life of onions. Onions must be thoroughly disinfected before entering the cold storage to ensure the safety of onion storage.

Onions are a very common ingredient in life, and they can be stored for a long time in about the same time as potatoes, but if they are cut, they need to be refrigerated in the refrigerator. The cut onion does not need to be placed in the room, it is not very useful, the onion is suitable for eating, and it is not suitable to be placed in the room to remove formaldehyde or treat colds.

Cut onions can't be stored at room temperature for too long, at most more than ten hours, if you want to keep longer, you need to wrap them in plastic wrap and then put them in the refrigerator, so that the storage time will be a little longer.

There is no benefit. It is said online that the benefit of cutting off the scallions in the shed and putting them in the room is that it can prevent colds, because onions can absorb bacteria.

But in fact, the smell of onions contains a sulfide, and eating some onions every day will have a certain inhibitory effect on the respiratory chain and bacteria in the intestines, but it is inaccurate to put onions in the room whether this smell can absorb bacteria. Colds are often viral flu, and the virus that causes colds accounts for 70%-80% of the pathogenic microorganisms, and onions do not inhibit the virus.

Traditional Chinese medicine believes that onions have the properties of a hot and warm solution. Onion ** cold, relying on its slightly spicy taste, plays a role in spreading colds and sweating, but it is too weak to play a role in concentrating the room. In traditional Chinese medicine, you can directly drink soup or water boiled with onions, which can bring the effect of onions into the human body and prevent colds.

Therefore, there is no benefit in cutting the onion and leaving it in the room.

Generally, when cutting onions, you can put a basin of cold water next to it, which is conducive to absorbing molecules in the air and reducing the occurrence of spicy eyes. There is heat in the eyes, mainly because during the cutting process due to the release of the smell of onions, which leads to the presence of a spicy taste in the air, which will lead to the occurrence of tears, which is a normal phenomenon and in the case of 3 to 5 minutes will relieve and disappear the noisy people.

Hello, onions last more than three months. However, in the process of preserving the over-covered acacia, it should be placed in a dry and sheltered environment to avoid moisture on the onion, and it is best to use plastic wrap to cover it and put it in cold storage, and the temperature should be kept at about minus 2 degrees, so that the preservation time of the onion can be extended.