After the pineapple is harvested, it still undergoes a metabolic process, in which the respiration is more vigorous, the starch and sugar content of the pineapple fruit gradually decrease, the pulp tissue gradually becomes soft, and the fruit quality gradually declines after reaching the best level, resulting in over-ripening and decline. rot. As pineapple matures mainly in high temperature season, it brings great difficulties for storage and preservation. The current application of storage and preservation are mainly low-temperature Tibetan method, modified atmosphere storage method and agent preservation method. (a) The cryogenic storage method mainly suppresses respiration by lowering the temperature to achieve the purpose of storage and preservation. The response of pineapple fruit to storage temperature is related to the ripeness of pineapple fruit. If no whole yellow-green fruit is harvested at a temperature of 10°C during harvest, it will easily produce cold damage. According to the United States Hawaii test results, the maximum storage life at 7 °C for four weeks, India's recommended storage temperature is 8 °C, while South Africa recommends 8.5 °C. (2) The purpose of the modified atmosphere storage method is mainly to reduce the oxygen content in the storage and to reduce the respiration to achieve freshness preservation. According to the University of Hawaii's study of atmospheric atmosphere composed of 2% oxygen and 98% nitrogen, the preservation period of pineapple can be prolonged at a temperature of 7.2°C. (C) drug preservation law According to reports, half mature pineapple soaked in 100ppm 2,4,5-T liquid, at room temperature can be preserved for 6 to 14 days. According to another report, pineapples that yellowed 25% of small fruit were soaked in 100ppm sodium naphthaleneacetate solution and stored at room temperature for 9 days. Only 50% of these small fruits turned yellow, maintaining the unique flavor and flesh structure of the pineapple. The normal structure. Fresh incisions with 300-ppm Benzoate dip handles can effectively prevent the invasion of various types of bacteria from the incision.
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