Two cultivars, ‘Golden Delicious’ apple and itsnon-russeting mutant ‘Feng Shuai’ were used in the first experi-ment (2011), and only ‘Golden Delicious’ was used in the second experiment (2012). Both genotypes were 15 years old, which weregrafted on the rootstock of Malus robusta Rehd, and planted insandy loam soil.