Effects of Simulated Transportation Vibration on Quality and Softening Metabolism of Winter Jujube

In order to investigate the effects of transportation pavement grade on the quality and softening metabolism of winter jujube, this study simulated the actual transportation conditions of winter jujube on high, medium, and low road surfaces through setting vibration frequencies of 4, 10 and 20 Hz on a vibration test bench. The effects of transport vibrations on nutrient composition, softening metabolism, and polysaccharide content in winter jujube were evaluated. Additionally, the shelf life quality of winter jujube was evaluated at room temperature (25.0±1.0 ℃). Results showed that winter jujube appeared earlier decay, hardness decline was accelerated and red index increased with the increase of vibration frequency. The respiration intensity of winter jujube fruit in the vibration treatment groups increased. Throughout the shelf life, the respiratory intensity of the 20 Hz treatment consistently showed a higher level, thereby accelerating the physiological activity of the fruit and leading to substantial con