Study On Post-harvest Physiology And Storage Technology Of 21-century Peach

21-century peach, a new cultivar, has high edible and commercial value with its affluent nutrition. But the reports about its post-harvest physiology and storage technology are seldom until now, which influenced the development of storage and process. So in this paper, postharvest physiology and storage technology of fresh 21-century peach were systematically studied under different storage temperature and different atmosphere conditions, including the medicaments preventing the peach fruit from rotting. The optimum storage technology of 21-century peach was developed. The main research contents and results were as follow:1 The study on the respiration of 21-cenury peach in different temperature showed that the distinctive respiration peak was found during storage after harvest. It belonged to climacteric fruit.2 The weight-loss rate of 21-cenury peach during storage was reduced markedly by the low temperature combined with the appropriate low-oxygen content and the package of PVC film bag with holes.3 The firmness of 21-cenury peach reduced gradually during the storage, CA had a good effect on keeping firmness. The condition that the oxygen content of 3%~5% and the carbon dioxide content of 3%-5% at the temperature of 0℃ had the best quantity.4 During storage, Vc and titratable acid content decreased constantly; the contents of reducing sugar and total sugar increased gradually in the earlier stage then decreased during the later time; MDA content rose slowly in the whole process; the activity of PPO enzyme decreased at initial stages and increased in the latter part; the variation trends of AsA-POD activity were different in each treatment.5 The Vc content was negatively correlated with the activity of PPO, which the same as the MDA content with the firmness and the activity of AsA-POD with Vc content ; the correlation coefficients were -0.821, -0.807 and -0.716 respectively.6 Freezing point of 21 -century peach was -1.2 ℃.7 The fresh fruits used to stored over a long period of time must be picked by hand , and...