关键词: 砂梨（Pyrus pyrifolia Nakai）, 果实营养, 抗氧化活性

Abstract: The nutrient components and antioxidant performance indexes of four sand pear cultivars, Cuiguan, Cuiyu, Jinshui NO.2 and Xinshui pear cultivated in southern China were measured and analyzed. The results showed that the Jinshui NO.2 pear had the highest content of vitamin C, which was （3.59±0.02） mg/100 g; The Xinshui pear had the highest content of soluble solid, which was 12.32%±0.38%; The content of titratable acid in Cuiguan pear was the lowest, which was （0.60±0.07） g/kg; The Cuiyu pear had the lowest content of total phenol, which was （0.035±0.003） mg GAE/g, which cultivar of the fruit flesh was most resistant to browning. Correlation analysis showed that vitamin C and titratable acid were important factors affecting the antioxidant capacity of the pulp of these four sand pears. There was a significant positive correlation between total phenol and fruit soluble solid content, which was also a key factor to evaluate the nutritional level of sand pear fruit.

Key words: sand pear（Pyrus pyrifolia Nakai）, fruit nutrition, antioxidant activity