Abstract: In order to compare the adaptability of salinity of Malus micromalus cv., the growth characteristics of 'Dong Hong', 'Wu Mei, 'Ya Dang', 'Xi Yangyang', 'Xuan Li', 'Kai ersi', 'Wang Zu', and 'Hong Baoshi' were researched in the nursery of Yuan Da landscape company in Tianjin. The results showed that the stem diameter of 'Dong Hong' at base was largest（2.740 cm）and 'Wang Zu'（2.065 cm）was the smallest . The diameter of 'Hong Baoshi' at 1.2 m height of stem was the largest（2.445 cm）, and 'Wang Zu'（1.895 cm）was the smallest. The plant of 'Dong Hong' was the hightest（46l cm）and the canopy of 'Kai Ersi' was the widest（344.200 cm）, and one of 'Wu Mei'（122.450 cm）was the narrowest. The annual branch of 'Wu Mei' was longest（54.933 m）, and one of 'Hong Baoshi'（30.400 cm）was the shortest . The annual branch of 'Ya Dang' was most（14.200）, and one of 'Wang Zu'（6.400）was the least . The leaves of 'Wu mei' was most（46.067）, and one of 'Hong Baoshi'（11.133）was the least . The average growth rings of in 'Dong Hong at stem was the widest（0.633 cm）, and one of 'Wang Zu'（0.464 cm）was the narrowest. The salt tolerance of the eight varieties was 'Dong Hong' and 'Kai Ersi'>'Ya Dang', 'Hong Baoshi' and 'Xuan Li'>'Xi Yangyang' and 'Wu Mei'>'Wang Zu' by the comprehensive membership function analysis.

Key words: saline-alkali, varieties, North American Begonia, growth, salt tolerance