7Levitt. Responses of plants to Environmental Stress[ M]. New York: Academic, 1972,697.
8Levitt. Freezing temperature responses of plants to environmental Strees[ M]. New York: Academic Press, 1979,1:267-290.
9HANNINEN H. Modelling bud dormancy release in trees from cool and temperate regions[J]. Acta Forestalia Fennica,I990,213:l-4,7.
10PULATOV B,LINDERSON M LJONSSON A M. Modeling climate change impact on potato crop phenology, and risk of frost damage and heat stress in northern Europe[J], Agricultural and Forest Meteorology, 2015, 214:281-292.
