Fresh fruit and vegetable preservation technology is an integrated technology that requires close cooperation among various technical links. If any one of these links goes wrong, it may lead to failure of storage and economic losses. 1. Selecting stored agricultural products In storage operations, we must select suitable varieties, make full use of existing conditions and technologies, and grasp regional differences and time differences in order to obtain greater economic benefits. If some agricultural products may be profitable after being stored for a short time or transferred from another place, they do not need to be stored for a long time, otherwise they will be counterproductive. Such as cucumber, beans, eggplant, zucchini and so on. However, some varieties cannot achieve annual supply through facility cultivation. They can only harvest one season a year, and harvest time is short. The long-term storage of these vegetables will increase income. Before storage, first of all, it is necessary to understand the tolerance of the varieties. Generally speaking, the late-maturing varieties are more resistant to early-maturing varieties, the fruits and vegetables cultivated in regions with large temperature differences between day and night, and the fruits and vegetables that are cultivated in high-altitude regions. Secondly, it is necessary to select varieties according to the needs, and it is necessary to select late-maturing varieties when planning long-term storage, and select medium-early-maturing varieties when planning medium- and short-term storage. Third, stocks should be set according to market conditions. What varieties are popular and sold quickly will be stored. Fourth, we should also pay attention to the mix of different flavors to meet the needs of different consumer groups. 2. Storage requirements of different fruits and vegetables Certain fruits and vegetables have the same storage conditions and no adverse effects on each other. They can be stored in the same warehouse; while others are not, for example, the suitable storage temperature of apples is 0°C, and the suitable storage temperature of bananas Is 13 ~ 15 °C, if the banana is stored below 10 °C, it will produce cold damage, manifested as peel browning, can not be properly cooked and so on. Second, although some fruits and vegetables require the same storage temperature, because one of the volatile gases of fruits and vegetables has an adverse effect on the other, it should not be stored in the same store as kiwifruit is particularly sensitive to ethylene, and its ethylene concentration is extremely low ( In the case of 0.1 mg/kg), the fruit softens and the storage period is shortened. Therefore, apples and pears that release such gases should not be stored in the same warehouse. Third, some fruits and vegetables require higher relative humidity, such as apples and pears; while others require lower relative humidity, such as chestnuts, walnuts, etc. Therefore, these two types of fruit should not be stored in the same warehouse. 3. The use of preservatives to affect the storage of fruits and vegetables include temperature, humidity, and gas composition, among which temperature is the main factor. Under the suitable storage temperature conditions, with the use of preservatives and fresh-keeping bags, better preservation results will be obtained. 4. Pay attention to pre-harvest management Pre-harvest management refers to all cultivation techniques before harvesting, including fertilizer and water management, pest control, thinning and fruit thinning, and plastic trimming. In the management of fertilizer and water, attention should be paid to the application of organic fertilizer and inorganic fertilizer; balanced supply of N, P and K should be paid attention to by appropriate amount of trace elements; balanced supply in the early stage should be paid attention to in the pouring of water, and appropriate control in the later period, and the last time in 15 days before harvesting. Water; In the prevention and control of pests and diseases, attention should be paid to the use of highly effective, low-toxic or non-toxic, low-residue or residual pesticides and fungicides to produce safe and high-quality products; in addition, pre-harvest sprays of erythropoietin, non-nuclear agents, and bulking agents Fruits and vegetables such as hormone drugs are not suitable for storage.
An insulin injection pen is a medical device used to administer insulin to people with diabetes. It looks like a pen and contains a cartridge filled with insulin, a needle, and a mechanism for delivering the insulin dose. The pen is designed to be easy to use and is often preferred by patients over traditional syringes and vials. The insulin injection pen is available in different types, such as reusable and disposable pens, and can be used with different types of insulin. It is important to follow the instructions provided by the healthcare provider or pharmacist when using an insulin injection pen to ensure proper dosing and injection technique.
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