干寒地区山楂树的地上下部生长发育期短。根系开始活动晚，被迫休眠早；发芽开花晚，枝、叶、果实生育期短。气温是制约山楂栽培的主要因素。在品种选择上应发展早熟、抗寒、适应性强的山楂品种 Hawthorn in dry and cold hawthorn growth and development of the ground is short. Root activity began late, was forced to sleep early; buds flowering late, branches, leaves, fruit growth period is short. Temperature is the main factor restricting hawthorn cultivation. Variety selection should be developed precocious, cold, adaptable varieties of hawthorn