Abstract:
【Objective】 To understand the change of quality index of apricot fruits under different normal temperature storage conditions and to provide data reference for the determination of suitable harvest period and the optimization of normal temperature storage conditions.
【Methods】 Xinjiang good apricot varieties "tree dried apricot", "white apricot" and "glossy white apricot" were taken test material, and according to the fruit development time and fruit color in 70% mature and 80% mature, the picked fruits without damage were stored at room temperature and sampled at 3d intervals to determine fruit quality indicators and related metabolic enzyme activity.
【Results】 The results showed that under the normal storage conditions, the average decreasing rate of the six indexes was 41.36%, 6.10%, 57.60%, 47.03% and 61.70%, respectively. The content of soluble solids, total sugar content, pectin content and plasma membrane permeability showed an increasing trend, with the average increase rate of 9.38%, 118.08%, 238.64% and 194.27%, and octens were 14.58%, 85.28%, 229.48% and 199.82%, respectively. Cellulase and pectinase maintained high enzyme activity in the early storage period, with polyphenol oxidase activity and peroxidase activity gradually increasing. The soluble solids, total sugar content were significantly lower than those of octamature fruits, and hardness, titratable acid content and vitamin C content were higher than those of octamature fruits, but the difference was not significant.
【Conclusion】 During the normal temperature storage period, the fruit structural substances in the early stage and the inclusions in the later period change greatly. The physical structure of the 7th ripe apricot fruit is stable, and the external quality of the fruit is maintained well. The inclusion content of octomature fruit is relatively less decomposed, and the internal quality is maintained better. The storage tolerance of the three apricot varieties from strong to weak is "tree dried apricot", "oily big white apricot" and "big white apricot".