7Renard C M G C. Variability in cell wall preparations: Quantification and comparison of common methods [J]. Carbohydrate Polymers, 2005, 60: 515-522.
8Han J H, Hong K H, Jang H I, et al. Effect of characteristics of the bags and microclimate in the bags on russet of "Whangkeumbae" pear fruit[J]. Korea J Hort Sci Technol, 2002, 20(1): 32-37.
9Fallahi E, Colt W M, Baird C R, et al. Influence of nitrogen and bagging on fruit quality and mineral concentrations of "BC-2 Fuji" apple[J]. Hort Technology, 2001, 11(3): 462-466.
10Witney G W, Kushad M M, Barden J A. Induction of bitter pit in apple [J]. Sci Hort, 1991, 47: 173-176.