METHOD FOR PRESERVATION OF FRESH PLANTS BY VACUUM PRE-COOLING SYNCHRONOUSLY COMBINED WITH MODIFIED ATMOSPHERE TECHNIQUE

摘要

The present invention belongs to the field of post-harvest preservation technique of fresh plants, and discloses a method for the preservation of fresh plants by vacuum pre-cooling synchronously combined with modified atmosphere technique. The method comprises the following steps: (1) screening field-picked fresh plants, and selecting individuals with uniform size, consistent maturity, and no obvious defects; (2) placing the screened individuals in a vacuum pre-cooler for pre-cooling; (3) after the plants being pre-cooled to the final temperature, the device automatically shuts down the refrigerator and vacuum pump, and the pre-configured mixed gas is introduced from the intake air inlet into the vacuum chamber for re-pressing; and (4) taking the re-pressed fresh plants out of the pre-cooler, and performing modified atmosphere packaging and refrigerating. The method proposes that a specific mixed gas is filled during the vacuum pre-cooling and re-pressure stages, and the re-pressure process after pre-cooling is closely integrated with the modified atmosphere technique to reduce the respiration metabolism of the plant to a suitable low level, significantly prolonging the shelf life of the product for more than 5 days.