(I) Storage conditions
1. Temperature -1 -0°C.
2. Relative humidity 65%-70%.
3. Gas composition O2: 5%, C02: 10%-12%.
(II) Storage methods
1. The Tibetan-Tibetan Tibetan-Tibetan is a traditional method of storage in Beijing (Beijing), Tianjin (Tianjin), and Tang (Tangshan) areas in China. It is actually an outdoor heaping form with a long storage period and good results.
First, choose high-pitched, well-ventilated, easy-to-drain sites, pad the soil, lay up the crop stalks, and then stack the dried onion petals on the straw. The stacking shape is rectangular, 5-6m long and 1.5. -2m, 1.2-1.5m high. After the curtains are well covered, the surrounding areas and domes are covered with straw mats and tied with straw ropes or iron wire. In order to prevent rain, the top can be covered with plastic film. In the early stage of storage, the temperature should be checked and the fever should be found and the blood should be poured in time.
2. Hanging the sun-dried onion braided into braids, each treaty 1m long, the two together as a hung. Raise the rack in the room (or outside), height 1.2-1.5m, length depending on the specific conditions. Hang the braided onion dumplings on the shelf so that the bottom of the dumplings is about 20 cm above the ground. Cover the plastic film to prevent rain. According to the weather, cover the mats, etc. at any time to prevent cold and frost, and timely remove the coverings. wet. This method has small storage, good effect, convenient management, and is suitable for home use.
3. Storage of large plastics Red onions were selected to remove the onions damaged by the rain and were placed in storage baskets that were sterilized with 0.5% bleach, and stored in shaded shades for storage until late July.
In the high dry terrain, well-ventilated air shed or indoor storage rack, storage rack size according to the amount of storage, generally suitable for 1000-2000kg, frame material can be round wood or angle iron, frame around the deep 15-20cm ditch. The bottom of the rack is laid 20-30cm larger than the shelf, and the onion is piled in the rack. After the stack, the onion is filled with plastic film. The bottom and the wall of the account are rolled together and buried in the groove. real.
The use of natural oxygen storage, so that the account of oxygen control at 5%, carbon dioxide control at about 13%. When the oxygen concentration in the account is too low, ventilate it through the cuffs. 4000ml of chlorine gas is introduced into the account every week to inhibit the growth of germs. When the outside temperature is too low, straw mats can be added around.
(3) Main problems and preventive measures during storage During on-time, onions have the following problems: First, fibrous roots are produced due to high humidity in the storage environment, nutrients are consumed, and diseases are infected; the other is germination after the dormancy period. . Current methods for preventing production are:
1. Use a relatively dry storage environment with a relative humidity of 65%-70%.
2. Properly dry before storage, so that the leaves become yellow and soft, the outer layer of phosphorus shrink film.
3. Qingxinsu (0.25%) treatment.
4. Radiation treatment is performed with 25-80 Gy gamma rays.
1. Temperature -1 -0°C.
2. Relative humidity 65%-70%.
3. Gas composition O2: 5%, C02: 10%-12%.
(II) Storage methods
1. The Tibetan-Tibetan Tibetan-Tibetan is a traditional method of storage in Beijing (Beijing), Tianjin (Tianjin), and Tang (Tangshan) areas in China. It is actually an outdoor heaping form with a long storage period and good results.
First, choose high-pitched, well-ventilated, easy-to-drain sites, pad the soil, lay up the crop stalks, and then stack the dried onion petals on the straw. The stacking shape is rectangular, 5-6m long and 1.5. -2m, 1.2-1.5m high. After the curtains are well covered, the surrounding areas and domes are covered with straw mats and tied with straw ropes or iron wire. In order to prevent rain, the top can be covered with plastic film. In the early stage of storage, the temperature should be checked and the fever should be found and the blood should be poured in time.
2. Hanging the sun-dried onion braided into braids, each treaty 1m long, the two together as a hung. Raise the rack in the room (or outside), height 1.2-1.5m, length depending on the specific conditions. Hang the braided onion dumplings on the shelf so that the bottom of the dumplings is about 20 cm above the ground. Cover the plastic film to prevent rain. According to the weather, cover the mats, etc. at any time to prevent cold and frost, and timely remove the coverings. wet. This method has small storage, good effect, convenient management, and is suitable for home use.
3. Storage of large plastics Red onions were selected to remove the onions damaged by the rain and were placed in storage baskets that were sterilized with 0.5% bleach, and stored in shaded shades for storage until late July.
In the high dry terrain, well-ventilated air shed or indoor storage rack, storage rack size according to the amount of storage, generally suitable for 1000-2000kg, frame material can be round wood or angle iron, frame around the deep 15-20cm ditch. The bottom of the rack is laid 20-30cm larger than the shelf, and the onion is piled in the rack. After the stack, the onion is filled with plastic film. The bottom and the wall of the account are rolled together and buried in the groove. real.
The use of natural oxygen storage, so that the account of oxygen control at 5%, carbon dioxide control at about 13%. When the oxygen concentration in the account is too low, ventilate it through the cuffs. 4000ml of chlorine gas is introduced into the account every week to inhibit the growth of germs. When the outside temperature is too low, straw mats can be added around.
(3) Main problems and preventive measures during storage During on-time, onions have the following problems: First, fibrous roots are produced due to high humidity in the storage environment, nutrients are consumed, and diseases are infected; the other is germination after the dormancy period. . Current methods for preventing production are:
1. Use a relatively dry storage environment with a relative humidity of 65%-70%.
2. Properly dry before storage, so that the leaves become yellow and soft, the outer layer of phosphorus shrink film.
3. Qingxinsu (0.25%) treatment.
4. Radiation treatment is performed with 25-80 Gy gamma rays.
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