Investigation and Analysis of the Glossiness of Fruit and Its Quality of Ziziphus jujuba Mill.cv.'Lingwuchangzao'

LI Yunmao; LU Hui; LI Xiang; FENG Xuerui; MA Chong; ZHANG Yue; CAO Bing

doi:10.15933/j.cnki.1004-3268.2024.10.014

Abstract：To explore the quality differences and its influencing factors of Lingwuchangzao different glossiness fruit[high glossiness fruit(S fruit)surface is flat and smooth,fruit shape is typical of long oval,with appearance of good quality;Low glossiness fruit(R fruit)surface is uneven,fruit shape for the top of the fruit is sharply convex or concave,with appearance of poor quality],taking 7 Lingwuchangzao plantations in Lingwu City,Ningxia as the object of investigation,the investigation recorded the tree age,seedling type,jujube hanging thickness,jujube hanging length and other indexes,and collected different glossy fruits(S,R fruits)as the experimental materials,determined its glossiness,single fruit quality,fruit transverse and longitudinal diameter,etc.,and the soluble solids,soluble sugar,vitamin C(Vc),titratable acid content and other intrinsic quality indexes of the fruits and carried out the comparison and correlation analysis.The results showed that different plantations had Lingwuchangzao fruits with different glossiness(S and R fruits),and the ratio of R fruits had a tendency to decrease with the increase of the age of the trees;the glossiness of S fruits was 1.56 times larger than that of R fruits.And single fruit quality,fruit longitudinal and transverse diameter,fruit shape index,fruit skin thickness,pulp thickness,nuclear longitudinal and transverse diameter,single nucleus quality,fruit hardness were all very significantly smaller than R fruits.S fruits had a lower vitamin C content,sugar-acid ratio,and solid-acid ratio than R fruits.However,there were no significant differences in soluble solids,soluble sugar,titratable acid,anthocyanoside content,and other indexes between the two types of fruits.There was a significant correlation between the ratios of S and R fruits in Lingwuchangzao plantations and various factors such as seedling type,tree age,jujube hanging thickness,leaf chlorophyll content,and others.In summary,Lingwuchangzao plantations have different glossiness fruit(both S fruit and R fruit).The quality of different glossiness fruit has its own advantages and disadvantages:S fruit has the advantages of good appearance quality,normal fruit shape,sweet and sour taste;R fruit has the advantages of large fruit size,high vitamin C content,good for storage and transportation.