Vacuum pre-cooling technology to keep fresh lily

Fresh lily is easily flowered and deteriorated after picking, resulting in a decline in commercial quality. At the same time, the processing and storage of fresh lily is difficult. It has always been a bottleneck restricting the sales of fresh lily. These factors have seriously affected the development and growth of lily industry. Shaodong County, Hunan Province, the essence of agricultural product development company for the first time the vacuum pre-cooling technology used in the preservation of fresh lily, making the fresh lily of the shelf life of up to 2 months. As the fresh lily picking, the body's respiration is still very strong, resulting in a large number of flowering buds in the storage and transportation process after picking, the loss of nutrient components is large, and the commercial nature is reduced. Vacuum pre-cooling technology is currently the most advanced refrigeration assistive technology in China. It places fresh agricultural products such as fruits and vegetables in a closed container, quickly draws out air and water vapor, forms a vacuum, and evaporates the water in the raw material at low pressure. The moisture evaporates and cools down to a desired temperature in a short time. At the same time, the moisture and ripening factors in the raw material tissue can be removed in a large amount in a vacuum state, which effectively inhibits the physiological and biochemical activities such as breathing of living raw materials. In combination with the plastic bag packaging, the water evaporation caused by the refrigeration of a general mechanical cold storage can be significantly reduced. Function, keep raw materials fresh, reduce the weight loss rate of storage. According to a scientific review report of the Science and Technology Department of Hunan Province, the technology is widely used in the cold storage of fruits and flowers, but its application in the preservation of day lily is still the first time. Shaodong, Hunan Province is an important production area of ​​Chinese lily, planting history for more than a thousand years. Exported to more than 20 countries and regions such as Europe, the United States, and Africa, the annual export volume accounts for more than 30% of the total export volume of dried day lily in the country, with an annual output value of 120 million yuan. However, for a long time there has been no breakthrough in the sales of fresh crop of day lily. The use of new technologies by Shaodong County's elite agricultural products company has increased the sales price of fresh yellow day lily by about 4 yuan/kg. In 2003, the company sold 2,300 tons in Guangdong alone.

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