Abstract: Nine jujube varieties with different types of sugar accumulation were used as materials to determine and analyze the content and significant differences of sugar acid components in jujubes of different varieties at four development stages. The results showed that the main sugar group of nine jujube fruits was sucrose, glucose and fructose, and the main acid group was malic acid, citric acid and succinic acid. The acid content of three kinds of different sugar accumulation jujubes increased continuously from fruit expanding period to ripening stage, and the sugar content was mainly reducing sugar accumulation from fruit expanding period to white mature period. Sucrose type cultivar were mainly sucrose accumulation from crisp ripening to ripe stage. Reducing sugar type varieties mainly accumulate reducing sugar from crisp ripening to ripe stage. Therefore, white mature period to crisp mature period is an important period for the accumulation of sugar components.

Key words: jujube（Ziziphus jujuba Mill.）, different sugar accumulation types, sugar and acid composition