| The characteristic fruits of Lingnan are rich in nutrition and have unique flavor. The planting area and yield of litchi and longan in China rank first in the world, and Lingnan area planting accounts for about 50%-60% of the whole country. However, the actual economic value of fruit industry is far lower than the value of fruit itself due to the bottleneck of preservation processing technologies. At present, the researches on the preservation technologies of Lingnan characteristic fruits at home and abroad include chemical preservation, modified atmosphere packaging preservation, irradiation preservation, new intelligent modified atmosphere packaging preservation, edible coating preservation, microencapsulation natural anti-microbial agents, and low-temperature plasma preservation, among which the first three are traditional technologies, while the last four are new technologies. Researches on processing include fruits drying （hot air drying, heat pump energy saving drying, freeze drying）, fruit fermentation （fruit wine, fruit vinegar, lactic acid bacteria fermentation）,juice processing （traditional thermal and chemical sterilization, new non-thermal sterilization （high pressure and pulse electric field）, novel concentrating （freeze concentrating, gas hydrate concentrating）, and comprehensive utilization of by-products. The research directions of preservation and processing are the improvement of traditional technologies and the exploration of new technologies. The former is mainly used in combination, while the latter mainly adopts the methods of physical field assistance and biological fermentation, both of them cannot meet the industrial demand. The maturity and industrialization of new technologies, and their effective combination with traditional technologies will be the focus of future researches. This paper summarized the research progress in the preservation and processing technologies are systematically analyzed from the aspects of current situation and existing problems of the preservation and processing of Lingnan characteristic fruits, and new preservation and processing technologies, aiming to provide references to promote the development of Lingnan characteristic fruit industry. |
