Bulbous fennel, also known as fennel and sweet fennel, is a variant of the fennel species of the genus Umbelliferae. The main edible parts are the bulbous stems formed by the cohesion of the bases of the leaf sheaths. It has a unique aroma and sweet taste and is more flavorful than the leafy fennel. More intense. Appropriate storage before New Year's Day and Spring Festival can effectively improve economic efficiency. The main problems of storage of bulb anise are dehydration, wilting, leaf sheath defoliation and browning. The main way to prevent these problems is to control the appropriate temperature and choose the right package.
1 Storage Environment Requirements Bulb fennel suitable storage temperature is 0 °C, suitable for storage of relative humidity above 95%, when the humidity of the storage environment is too low, the outer leaves of bulbs and fennel dehydration wilting, increase loss, reduce commodity.
2 Storage Technology Measures
2.1 Pre-harvest requirements The production process should pay attention to balanced fertilization. Excessive application of nitrogen fertilizer will reduce its tolerance to storage; no watering for 1 week prior to harvest can effectively improve its resistance to storage.
2.2 Harvesting and trimming Bulbous fennel can be harvested from the time of planting to harvesting, usually about 3 months, when bulbs are fully inflated and the heart and leaves are significantly shortened. Harvest time is best to choose the lowest temperature in the morning. Harvest the root plate with a knife and leave about 5 cm leaf sheath on the bulb. In the process of harvesting and transporting bulbous fennel, the surface of the leaf sheath can easily cause mechanical damage, which not only affects the quality of the product, but also increases the loss and reduces the storage. Therefore, it is necessary to avoid unnecessary mechanical damage from the beginning of harvesting. When harvesting, it is best to move the vegetable basket to the ground and wrap the wrapping around the basket to prevent food damage during transportation. After harvesting, the bulbs, fennel, and fragrant codes that meet the storage requirements are placed in the vegetable baskets to prevent over-cooking and convulsions of bulbs and fennel. Because of its rapid entry into the aging period, the sheaths of the fennel will be changed earlier.
2.3 Transportation After harvest, bulb fennel should be transported to cold storage as soon as possible. The loading and unloading truck should gently move the vegetable basket to avoid mechanical damage caused by collision.
2.4 Pre-cooling can be cold pre-cooling and differential pre-cooling. 1 Cold storage pre-cooling, pre-refrigeration temperature is set at 0 °C, pre-cooling will be basket along the flow of cold wind within the library stacking row, between rows and rows to leave 2O-30 cm gap (wind), by The wall is about 15 cm away from the wall, and the stacking height is lower than the fan. Pre-cooling time 12-24 h (hours). 2 Differential precooling, precooling temperature is set at 0 °C, pre-cooling according to the requirements of differential pressure precooler stacking and pre-cooling operations. Pre-cooling time is about 30 minutes (minutes).
2.5 Packaging Packaging is very important to improve the quality of storage of bulb anise, can effectively delay the emergence of leaf sheath change time, if not packaged, storage for a few days will become sheath sheath, effective packaging can be extended to 20-30 d (days). However, packing too strict will cause browning of leaf sheaths, so it is particularly important to choose suitable packaging materials. It is best to choose 0.O1-0.02 mm PE plastic film, single or 2-3 1 package. Wrap it in a basket and store it. 0.03 mm PE plastic film can also be used to make the bag on the storage basket, folded or zipped. If the storage capacity is large, the baskets can be coded into 2-3 rows of baskets. The length of the baskets can be determined according to the number of dishes and the size of the cold storage. The height of the baskets should be lower than that of the cold storage fans, with 0.03-0.04 mm. The PE plastic film is made into a large account, and it is stored on the dish.
2.6 Storage The cold storage temperature is 0°C. Keep the temperature of the cold storage balanced during storage to avoid undue fluctuations. Usually can be stored 2O-30d (days), and then continue to extend the storage time, due to the change of leaf sheath and seriously affect its commercial nature.
1 Storage Environment Requirements Bulb fennel suitable storage temperature is 0 °C, suitable for storage of relative humidity above 95%, when the humidity of the storage environment is too low, the outer leaves of bulbs and fennel dehydration wilting, increase loss, reduce commodity.
2 Storage Technology Measures
2.1 Pre-harvest requirements The production process should pay attention to balanced fertilization. Excessive application of nitrogen fertilizer will reduce its tolerance to storage; no watering for 1 week prior to harvest can effectively improve its resistance to storage.
2.2 Harvesting and trimming Bulbous fennel can be harvested from the time of planting to harvesting, usually about 3 months, when bulbs are fully inflated and the heart and leaves are significantly shortened. Harvest time is best to choose the lowest temperature in the morning. Harvest the root plate with a knife and leave about 5 cm leaf sheath on the bulb. In the process of harvesting and transporting bulbous fennel, the surface of the leaf sheath can easily cause mechanical damage, which not only affects the quality of the product, but also increases the loss and reduces the storage. Therefore, it is necessary to avoid unnecessary mechanical damage from the beginning of harvesting. When harvesting, it is best to move the vegetable basket to the ground and wrap the wrapping around the basket to prevent food damage during transportation. After harvesting, the bulbs, fennel, and fragrant codes that meet the storage requirements are placed in the vegetable baskets to prevent over-cooking and convulsions of bulbs and fennel. Because of its rapid entry into the aging period, the sheaths of the fennel will be changed earlier.
2.3 Transportation After harvest, bulb fennel should be transported to cold storage as soon as possible. The loading and unloading truck should gently move the vegetable basket to avoid mechanical damage caused by collision.
2.4 Pre-cooling can be cold pre-cooling and differential pre-cooling. 1 Cold storage pre-cooling, pre-refrigeration temperature is set at 0 °C, pre-cooling will be basket along the flow of cold wind within the library stacking row, between rows and rows to leave 2O-30 cm gap (wind), by The wall is about 15 cm away from the wall, and the stacking height is lower than the fan. Pre-cooling time 12-24 h (hours). 2 Differential precooling, precooling temperature is set at 0 °C, pre-cooling according to the requirements of differential pressure precooler stacking and pre-cooling operations. Pre-cooling time is about 30 minutes (minutes).
2.5 Packaging Packaging is very important to improve the quality of storage of bulb anise, can effectively delay the emergence of leaf sheath change time, if not packaged, storage for a few days will become sheath sheath, effective packaging can be extended to 20-30 d (days). However, packing too strict will cause browning of leaf sheaths, so it is particularly important to choose suitable packaging materials. It is best to choose 0.O1-0.02 mm PE plastic film, single or 2-3 1 package. Wrap it in a basket and store it. 0.03 mm PE plastic film can also be used to make the bag on the storage basket, folded or zipped. If the storage capacity is large, the baskets can be coded into 2-3 rows of baskets. The length of the baskets can be determined according to the number of dishes and the size of the cold storage. The height of the baskets should be lower than that of the cold storage fans, with 0.03-0.04 mm. The PE plastic film is made into a large account, and it is stored on the dish.
2.6 Storage The cold storage temperature is 0°C. Keep the temperature of the cold storage balanced during storage to avoid undue fluctuations. Usually can be stored 2O-30d (days), and then continue to extend the storage time, due to the change of leaf sheath and seriously affect its commercial nature.
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